Thematische Bibliographien / T6 heat treatment

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Auswahl der wissenschaftlichen Literatur zum Thema „T6 heat treatment“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "T6 heat treatment"

Özyürek, Dursun, Tansel Tunçay und Hasan Kaya. „The Effects of T5 and T6 Heat Treatments on Wear Behaviour of AA6063 Alloy“. High Temperature Materials and Processes 33, Nr. 3 (01.06.2014): 231–37. http://dx.doi.org/10.1515/htmp-2013-0060.

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AbstractIn this study, T5 heat treatment was applied to AA6063 alloy aged at 455 K for 2 hours after extrusion at 686 K. T6 heat treatment was also carried out by ageing at 455 K for 2 hours after solution heat treatment at 794 K for 1 hour. Heat treated T5 and T6 specimens were tested by pin-on-disc type wear equipment. Wear test was carried out by using 10, 20, 30 N loads and 400, 800, 1200 and 1600 m wear distance. T5 and T6 heat treated specimens were characterized with scanning electron microscope, X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and hardness measurements. Worn surfaces of the specimens was also characterised with SEM. The results indicated that small and homogenously dispersed Mg2Si precipitates formed in AA6063 aluminium alloy with T6 heat treatment were compared to the T5 heat treatment. As a result of increment precipitate size, wear resistance decreased. T6 heat treated specimens showed higher hardness compared to the T5 heat treated specimens. In addition wear resistance and friction coefficient of both T5 and T6 heat treated specimens decreased with increasing applied load.

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Zhang, Z., B. L. Xiao und Zong Yi Ma. „Influence of Post Weld Heat Treatment on Microstructure and Mechanical Properties of Friction Stir-Welded 2014Al-T6 Alloy“. Advanced Materials Research 409 (November 2011): 299–304. http://dx.doi.org/10.4028/www.scientific.net/amr.409.299.

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5 mm thick 2014Al-T6 alloy plates were friction stir welded at the welding speeds of 100-400 mm/min and the rotation rates of 400-800 rpm. The influence of post weld artificial aging and T6 treatments on the microstructure and mechanical properties of FSW 2014Al-T6 joints were investigated. It was found that artificial aging did not alter the grain structure but T6 heat treatment caused the abnormal grain growth at the nugget zone. The tensile strength of the joints could not be enhanced by the artificial aging treatment but were improved by the T6 treatment. The effectiveness of T6 treatment is related with the distribution of “S” line.

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Boonchouytan, Worapong, Thanate Ratanawilai und Prapas Muangjunburee. „Effect of Pre/Post Heat Treatment on the Friction Stir Welded SSM 356 Aluminum Alloys“. Advanced Materials Research 488-489 (März 2012): 328–34. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.328.

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The butt joints of semi solid 356 were produced in as cast conditions by friction stir welding process (FSW). This experiment studied in pre/post heat treatment (T6) using the welding speed 160 mm / min with tilt angle tool at 3 degree and straight cylindrical tool pin. The factors of welding were rotating speed rates at 1320, 1750 rpm and heat treatment conditions. They were divided into (1) As welded (AW) joints, (2) T6 Weld (TW) joints, (3) Weld T6 (WT) joints, (4) T6 Weld T6 (TWT) joints, (5) Solution treated Weld Artificially aged (SWA) joints and (6) Weld Artificially aged (WA) joints. Rotating speed and heat treatment (T6) condition were an important factor to micro, macro structure of metal and mechanical properties of the weld. Increasing rotating speed and different heat treatment condition impacted onto tensile strength due to the defects on joints. Therefore the optimum welding parameter on joint was a rotating speed 1320 rpm, the welding speed 160 mm/min, heat treatment condition of Weld T6 (WT) which obtained the highest tensile strength 228.92 MPa, as well as, highest hardness of 98.1 HV

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Ertuğrul, Onur, Zafer Çağatay Öter, Mustafa Safa Yılmaz, Ezgi Şahin, Mert Coşkun, Gürkan Tarakçı und Ebubekir Koç. „Effect of HIP process and subsequent heat treatment on microstructure and mechanical properties of direct metal laser sintered AlSi10Mg alloy“. Rapid Prototyping Journal 26, Nr. 8 (26.06.2020): 1421–34. http://dx.doi.org/10.1108/rpj-07-2019-0180.

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Purpose The purpose of this paper is to evaluate the effect of post process combinations, e.g. hot isostatic pressing (HIP) only, HIP + T6 heat treatments, and T6 only, with different aging time, on surface properties, microstructure and mechanical properties of stress-relieved AlSi10Mg parts produced by direct laser metal sintering. Design/methodology/approach HIP process and HIP + T6 heat treatments were applied to as stress-relieved direct laser metal sintered (DMLS) AlSi10Mg parts. Aging times of 4 and 12 h are selected to examine the optimum duration. To analyze the advantages of HIP process, a T6 heat treatment with 4 h of aging was also applied. Densities, open porosities and roughness values of as stress-relieved, HIPed, HIP + T6, and T6-only samples were measured. The samples were characterized by OM and SEM together with EDX analysis. An image analysis study was made to evaluate the inner pore structure, thereby to understand the mechanical behavior. Findings HIP process does not cause a significant change in surface porosity; yet it has a positive influence on inner porosity. HIP process results in a microstructure of the aluminum matrix surrounded by a network of micron and nano size Si particles. Additional heat treatment results in larger particles and precipitation. After HIPing, ductility increases but strength decreases. Samples aged 4 h present improved yield and tensile strength but decreased elongation, yet samples aged for 12 h reach a combination of optimum strength and ductility. The lower level of tensile strength and ductility in T6-only condition indicates that HIP process plays a crucial role in elimination of the porosity thus improves the effectiveness of subsequent heat treatment. Originality/value The study investigates the effect of post-process conditions and optimizes the aging time of the T6 heat treatment after HIP process in order to obtain improved mechanical properties. The stress-relieved state was chosen as the reference to prevent distortion during HIPing or heat treatment.

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Kliemt, Christian, Franz Wilhelm und Joachim Hammer. „Lifetime Improvement of AlSi6Cu4 Cylinder Head Alloy“. Advanced Materials Research 891-892 (März 2014): 1627–32. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1627.

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Efficiency increase of combustion engines in automotive development is directly related to improved material performance at high temperatures. In particular, the interaction of complex thermal and mechanical forces under service loading is one of the major factors affecting the lifetime. In this paper the aluminium cylinder head alloy AlSi6Cu4 is characterized concerning the high temperature low cycle fatigue (LCF) and thermo-mechanical fatigue (TMF) behaviour. Experiments were performed in air at temperatures between 200 and 400°C. The influence of the initial heat treatment and microstructure, testing temperatures, strain amplitudes and strain rates is reported. Two heat treatment modifications (i.e. overaged condition, T7, and a modified combined heat treatment, hot iso-static pressing (HIP), prior to peak hardening according to T6) are compared to the T6 standard used in service. The strain amplitudes ranged between 0.2 to 0.7%. For the standard T6 heat treatment LCF results at 400°C indicate increased ductility and longer lifetimes compared to 200°C. For the overaged microstructure and the modified treatment HIP + T6 under TMF exposure clear lifetime enhancements are observed which are significantly highest for the HIP + T6 version. Thus, the elimination of almost any microporosity reduces local stress concentrations and early crack initiation promoting failure. Special attention is focussed on microstructural changes during high temperature exposure.

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Zhou, Jia, Guang Yao Wang, Yang Li und Xin Ming Wan. „Influence of Heat Treatment Parameters on Mechanical Properties and Crashworthiness of Aluminum Crash Box“. Advanced Materials Research 912-914 (April 2014): 194–99. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.194.

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The influence of heat treatment parameters, i.e. solution temperature, solution time, aging temperature and aging treatment on the mechanical properties and crashworthiness of crash boxes produced with 6101 aluminum alloy were studied. The optimal heat treatment processing was obtained as follows: 510°C×45min+175°C×7h. The crash boxes were treated under different heat treatments, i.e. T1 temper,T4 temper and T6 temper and then compressed under static pressure. The results indicate that the energy absorption of crash box can after T6 treatment is significantly higher than the samples under T1temper and T4 temper, which have similar energy absorption. The peak force of static pressure crash boxes treated under T6 temper is obviously higher than the other two tempers.

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Mahathaninwong, N., T. Plookphol, J. Wannasin und S. Wisutmethangoon. „T6 heat treatment of rheocasting 7075 Al alloy“. Materials Science and Engineering: A 532 (Januar 2012): 91–99. http://dx.doi.org/10.1016/j.msea.2011.10.068.

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Tonelli, Lavinia, Erica Liverani, Alessandro Morri und Lorella Ceschini. „Role of Direct Aging and Solution Treatment on Hardness, Microstructure and Residual Stress of the A357 (AlSi7Mg0.6) Alloy Produced by Powder Bed Fusion“. Metallurgical and Materials Transactions B 52, Nr. 4 (19.05.2021): 2484–96. http://dx.doi.org/10.1007/s11663-021-02179-6.

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AbstractApplying additive manufacturing (AM) technologies to the fabrication of aluminum automotive components, with an optimized design, may result in improved vehicle light weighting. However, the post-process heat treatment of such alloys has to be customized for the particular AM microstructure. The present study is aimed at investigating the effect of different heat treatments on the microstructure, hardness and residual stress of the A357 (AlSi7Mg0.6) heat-treatable alloy produced by laser-based powder bed fusion (LPBF, also known as selective laser melting). There are two major issues to be addressed: (1) relieving the internal residual stress resulting from the process and (2) strengthening the alloy with a customized heat treatment. Therefore, stress-relief annealing treatment, direct aging of the as-built alloy and a redesigned T6 treatment (consisting of a shortened high-temperature solution treatment followed by artificial aging) were examined. Comparable hardness values were reached in the LPBF alloy with optimized direct aging and T6 treatments, but complete relief of the residual stress was obtained only with T6. Microstructural analyses also suggested that, because of the supersaturated solid solution, different phenomena were involved in direct aging and T6 treatment.

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Zhang, Xiu Zhi, Ying Jie Li, Xing Wang Duan, Ya Wei Shao, Jun Bo Xiong und Jian Sheng Liu. „The Influences of Anticipated Heat Treatment on the Electroless Nickel Plating on Magnesium Alloys“. Advanced Materials Research 139-141 (Oktober 2010): 452–55. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.452.

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In this paper, effects of anticipated heat treatment on the electroless nickel plating coated on magnesium alloys AZ91D were investigated by using heat treatments of solution (T4) and solution + aging (T6) before electroless nickel plating. The influence of anticipated heat treatment on the structure, composition and anti-corrosion property of electroless coating were studied by using Scanning Electrical Microscope (SEM), EDS and Corrodkote corrosion test. It is shown that compared with the as-casted magnesium alloys and samples treated with T4, the deposition rate of Ni, the P contained in the coating and the anti-corrosion property of samples treated with T6 are the highest for the given system studied, and T6 treatment can promote the anti-corrosion property of the coating effectively.

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Jin, Yun Xue, Qiang Qiang Tong, Xiao Ya Wang und Hong Mei Chen. „Effect of T6 Heat Treatment on Dry Sliding Frictional Wear Characteristics of Al-20Si-5Cu Alloy“. Advanced Materials Research 750-752 (August 2013): 591–95. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.591.

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The effect of T6 heat treatment on dry sliding friction and wear characteristics of Al-20Si-5Cu under a fixed sliding speed of 200r/min and sliding time of 30mins was illustrated in this paper. The result reveals that T6 heat treatment can improve morphology of primary Si and Al2Cu particles, enhance the hardness of the matrix. Wear rate increased with increasing of applied load. T6 heat treated samples have high wear resistance which is related to the improvement of microstructure, particularly with their increased hardness of matrix. But friction coefficient varies with heat treatment processes and has no sensitivity to applied loads, which fluctuates in a small range, so the friction coefficient can be considered to be stable. The wear mechanisms of T6 heat treated samples are also changed with increasing of applied load, from oxidative wear to fatigue wear.

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Dissertationen zum Thema "T6 heat treatment"

Moller, H., G. Govender und W. E. Stumpf. „Improvement of the T6 heat treatment of rheocast alloy A356“. Journal for New Generation Sciences, Vol 8, Issue 2: Central University of Technology, Free State, Bloemfontein, 2010. http://hdl.handle.net/11462/561.

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Published Article
The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for traditional dendritic alloys. These heat treatments are not necessarily the optimum heat treatments for SSM processing. The T6 heat treatment of aluminium alloys is a relatively expensive process and a reduction in treatment times would be advantageous. In order to improve the T6 heat treatment cycle for rheocast alloy A356, the effect of various parameters on the quality index were investigated. These included solution treatment time, natural aging time, artificial aging temperature and artificial aging time.

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Sarentica, Atilla. „Conventional heat treatment of additively manufactured AlSi10Mg“. Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-75056.

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Alat, Ece. „Analysis Of Magnesium Addition, Hydrogen Porosity And T6 Heat Treatment Effecrts On Mechanical And Microstructural Properties Of Pressure Die Cast 7075 Aluminum Alloy“. Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615018/index.pdf.

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Aluminum alloys are having more attention due to their high specific stiffness and processing advantages. 7075 aluminum alloy is a wrought composition aluminum alloy in the Al-Zn-Mg-Cu series. Due to the significant addition of these alloying elements, 7075 has higher strength compared to all other aluminum alloys and effective precipitation hardenability characteristic. On the other hand, aluminum alloys have some drawbacks, which hinder the widespread application of them. One of the most commonly encountered defects in aluminum alloys is the hydrogen porosity. Additionally, in case of 7075, another problem is the lack of fluidity. Magnesium addition is thought to be effective in compensating this deficiency. Accordingly, in this study, die cast 7075 aluminum alloy samples with hydrogen porosity and additional magnesium content were investigated. The aim was to determine the relationship between hydrogen content and hydrogen porosity, and the effects of hydrogen porosity, additional magnesium and T6 heat treatment on ultimate tensile and flexural strength properties of pressure die cast 7075 aluminum alloy. 7075 aluminum alloy returns were supplied from a local pressure die casting company. After spectral analysis, pressure die casting was conducted at two stages. In the first stage, 7075 aluminum alloy with an increase in magnesium concentration was melted and secondly 7075 aluminum alloy was cast directly without any alloying addition. While making those castings, hydrogen content was measured continuously before each casting operation. As a final operation T6 heat treatment is carried out for certain samples. Finally, in order to accomplish our aim, mechanical and microstructural examination tests were conducted.

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Santos, Marcus Aurélio dos. „A metalurgia do pó para produção de peças de alumínio na indústria metalúrgica“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/184879.

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O objetivo desse trabalho é analisar a fabricação de buchas a base de Alumínio empregando o processo de Metalurgia do Pó, em substituição ao processo atual de fundição e usinagem. O material testado é uma liga a base de Alumínio AlSi10Cu3, essa liga contem 87% de Alumínio, 10% de Silício, 2,5% de Cobre, 0,25% de Magnésio e Manganês, conforme a norma DIN EN 1706. As amostras foram compactadas à 600MPa, resultado obtido da curva de compressibilidade. As amostras foram sinterizadas a uma temperatura de 550ºC durante 60 minutos. Após sinterização as amostras foram submetidas ao processo de Tratamento Térmico T6, com temperatura de solubilização de 480°C por 5 horas e envelhecimento a 220°C por 5 horas, nomeado Tratamento Térmico A. Foram realizados ensaios de densidade, dureza, metalografia, compressibilidade, difração de raios-x e variação dimensional. A densidade das amostras sinterizadas atingiram 2,52 g/cm3 ± 0,25. A dureza superficial das amostras atingiram uma média de 51 HB ± 4. Com o tratamento térmico T6 a dureza elevou-se para 74 HB ± 2. A variação dimensional das amostras após sinterização foi de 0,20% na área dos corpos de prova. Foram estudadas também diferentes composições químicas para elevar a dureza superficial. Executou-se um teste com outros parâmetros de Tratamento Térmico T6 para aumento da dureza, chamado de Tratamento Térmico B, com parâmetros de temperatura de solubilização de 550°C por 1 hora e envelhecimento com 160°C por 18 horas.
The objective of this work is to analyze the manufacture of aluminum based bushings employing the Powder Metallurgy process in substitution of the current process of casting and machining. The material tested is an AlSi10Cu3 aluminum alloy, this alloy contains 87% aluminum, 10% silicon, 2.5% copper, 0.25% magnesium and manganese, according to DIN EN 1706. The samples were pressed at 600MPa, result obtained from the compressibility curve. The samples were sintered at a temperature of 550°C for 60 minutes. After sintering, the samples were submitted to the T6 Thermal Treatment process, with a solubilization temperature of 480°C for 5 hours and aging at 220°C for 5 hours, named Thermal Treatment A. Density, hardness, metallography, compressibility, X-ray diffraction and dimensional variation testings were performed. The density of the sintered samples reached 2.52 g/cm3 ± 0.25. The surface hardness of the samples reached the mean of 51 HB ± 4. With the heat treatment T6 the hardness increased to 74 HB ± 2. The dimensional variation of the samples after sintering was 0.20% by area. Different chemical compositions were also studied to raise the surface hardness. A test was performed with other parameters of T6 Thermal Treatment to increase the hardness, called Thermal Treatment B, with parameters of solubilization temperature of 550°C for 1 hour and aging with 160°C for 18 hours.

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Mossi, Charlen. „Melhoria no processo de fabricação de peça de emprego militar fundida sob baixa pressão em liga de Al-Si“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179463.

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O objetivo deste trabalho foi de otimizar o processo de fabricação da placa reforçadora de solo, fabricada pelo processo de injeção sob baixa pressão em liga de alumínio. Atualmente, a liga utilizada no processo é a SAE 305 (AA 413) e problemas de falha do componente em campo tem sido reportados pelos clientes. As peças estudadas referem-se às placas acessórias utilizadas para fornecer sustentação durante a entrada e saída de vaus por carros de combate do Exército Brasileiro, anteriormente adquiridas no mercado internacional e agora produzidas internamente. O estudo focou na alteração da composição química da liga, baseado na liga de alumínio da peça importada, tratamento de banho com modificação do silício, refino de grão e modificação no projeto do molde permanente. Adquiriu-se junto ao fornecedor a liga de Al9Si0,3Mg visando a fabricação das peças com tratamento térmico T6. Para obtenção das propriedades mecânicas foram realizados ensaios de tração, dureza Brinell e impacto. Para caracterização metalúrgica foram realizados ensaios metalográficos com auxílio de microscopia óptica. Verificou-se que a presença de magnésio na liga Al-Si exclusivamente com tratamento térmico T6, alterou o comportamento mecânico da peça melhorando seus resultados. O tratamento de banho com modificador de silício a base de sódio não produziu resultados significativos. Finalmente, realizou-se simulação do preenchimento da molde via software CAE Click2Cast, modo injeção de baixa pressão, para caracterização dos defeitos e sugestões de melhoria no sistema de alimentação. Deste trabalho, conclui-se que as melhores propriedades mecânicas de resistência a tração e dureza foram obtidas com a alteração da liga SAE 305 para a liga Al9Si0,3Mg com tratamento térmico T6 e que para atingir melhores resultados deve-se introduzir ao processo um novo molde permanente com refrigeração e alimentação adequada da peça.
The objective of this research was to optimize the manufacturing process of the reinforcing plate of soil, manufactured by the injection process under low pressure in Al-Si alloy. Currently, the alloy used in the process is SAE 305 (AA 413) and mechanical resistance problems, when used in the field, have been reported by customers. Currently, the alloy used in the process is SAE 305 (AA 413) and field component failure problems have been reported by customers. The studied pieces refer to the accessory plates used to provide support during the entry and exit of vats by tanks of the Brazilian Army, previously acquired in the international market and now produced internally. The study focused on the alteration of the chemical composition of the alloy, based on the aluminum alloy of the imported part, bath treatment with silicon modification, grain refining and modification in the permanent mold design. The Al9Si0.3Mg alloy was purchased from the supplier to manufacture the T6 heat treated parts. To obtain the mechanical properties tensile tests, Brinell hardness and impact were performed. For metallurgical characterization, metallographic tests were performed with the aid of light microscopy. It was verified that the presence of magnesium in the Al-Si alloy exclusively with T6 heat treatment, altered the mechanical behavior of the part improving its results. Bath treatment with sodium silicon modifier did not produce significant results. Finally, the mold filling simulation was carried out using CAE Click2Cast software, low pressure injection mode, to characterize the defects and suggestions for improvement in the feed system. From this work, it was concluded that the best mechanical properties of tensile strength and hardness were obtained with the change of the SAE 305 alloy to the Al9Si0.3Mg alloy with T6 thermal treatment and that to achieve better results a new permanent mold with cooling and proper feeding of the part.

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Julišová, Martina. „Optimalizace tepelného zpracování slitiny hliníku AlSi7Mg0,6“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229932.

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The presented diploma thesis deals with various types of quenching and their respective effects on mechanical and structural properties of AlSi7Mg0.6 alloy castings. Cast with precision casting technology into a self-supporting ceramic shell made by plaster investment technology, flat test bars cast by Alucast were used as experimental samples. Sample castings were used in both cast state and after T6 heat treatment. Air-flow and air-water combination with varying water passage (spraying) were used as the quenching media in the quenching process of the castings. In order to evaluate the effect of five different quenching processes on the structure and mechanical properties of the castings, the method of light microscopy, Brinell hardness test and static traction test were used. Evaluation and porosity and SDAS quantifications were carried out by means of image analysis. Experiments did not prove right the hypothesis holding that low SDAS values inevitably mean higher mechanical properties of the castings. On the other hand, distinct is the negative influence of heterogeneous structure and porosity. Despite the fact that the heat treatment was successful in reducing the influence of structural inhomogeneities, it cannot be concluded that spray quenching has an utterly positive bearing on the mechanical and structural properties of the castings.

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Domfang, Ngnekou Julius-Noël. „Étude expérimentale de la tenue en fatigue de l’alliage AlSi10Mg élaboré par fusion laser de lit de poudre Influence of as-built surface and heat treatment on the fatigue resistance of Additively Layer Manufacturing (ALM) AlSi10Mg alloy Fatigue resistance of selectively laser melted aluminum alloy under T6 heat treatment Fatigue properties of AlSi10Mg produced by Additive Layer Manufacturing“. Thesis, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique, 2019. http://www.theses.fr/2019ESMA0015.

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Ce travail montre l'impact des défauts et de la microstructure sur la limite de fatigue de l’AlSi10Mg de fabrication additive (FA). Les échantillons d’étude sont fabriqués suivant trois orientations (0 °, 45 ° et 90 °) ; les surfaces d’étude sont usinées ou brutes de fabrication. Les éprouvettes sont étudiées avec ou sans traitement thermique T6. Avant toute chose, le matériau est d’abord caractérisé en lien avec les paramètres du procédé à l’aide de plusieurs moyens (microscopie, microtomographie). Du point de la fatigue, les courbes S-N sont établies avant et après T6, principalement à R = -1 en sollicitation uniaxiale. Pour toutes les éprouvettes d’étude, l’analyse des faciès montre que ce sont toujours les défauts qui sont à l’origine de la rupture par fatigue. Ainsi, un critère est appliqué pour définir ces défauts critiques (type, taille morphologie et position) et la limite de fatigue est systématiquement analysée via les diagrammes de Kitagawa. Le rôle de la direction de construction sur la tenue en fatigue est étudié, avant et après traitement thermique T6, tant pour les surfaces usinées que brutes de fabrication. À cet effet, un scénario basé sur la taille caractéristique des grains est proposé pour expliquer les effets d’orientation post-T6. La contribution de la structure de précipitation est également étudiée ; ainsi que le rôle des défauts (type, taille, morphologie et position) sur la limite de fatigue à différents états microstructuraux : avant et après T6. Afin de comprendre les mécanismes d’endommagement par fatigue en surface, la méthode des répliques est déployée sur une éprouvette polie. Dans ce cadre, une loi de propagation des fissures naturelles, c'est-à-dire qu'elles sont dues à un défaut hérité du procédé, est identifiée. Elle permet de séparer les phases d’amorçage et de propagation, alimentant ainsi les discussions sur les phénomènes d’amorçage en présence de défauts. Par ailleurs, quelques critères de fatigue sont également discutés et l’approche Defect Stress Gradient (DSG) est adaptée au matériau d’étude en tenant compte de la taille des grains cristallographiques. Pour les sections utiles brutes de fabrication, le rôle du mode de suppression des supports fabrication sur l’amorçage des fissures de fatigue est étudié ; la définition de la notion de taille de défauts en présence de la rugosité, à l’échelle de l’ondulation de surface, est abordée. Sachant que l’amorçage peut avoir lieu sur une ondulation de surface ou sur un défaut isolé (porosité ou défaut de fusion), une méthode expérimentale est proposée pour analyser la compétition entre ces facteurs. Dans un contexte de développement industriel, l’influence sur la limite de fatigue des paramètres de procédé relatifs au laser (vitesse de balayage, puissance et distance de hachure), au lit de poudre (composition chimique, taille des particules, épaisseur du lit) est étudiée, en vue d’alimenter les discussions vers l’optimisation du procédé du point de vue de la tenue en fatigue
This work shows the impact of defects and microstructure on the fatigue limit of AlSi10Mg produced by Additive Layer Manufacturing (ALM). Samples are produced according to three orientations with respect to the construction plate (0 °, 45 ° and 90 °); the studied surfaces are machined or left as-built (AB) in the gauge section. The specimens are studied with or without T6 heat treatment. The study surfaces are machined or as built. Some specimens are subjected to T6 heat treatment. Before any others study, the material is characterized in connection with the process parameters through several techniques (microscopes and 3D X-ray microtomography). Regarding the fatigue, the S-N curves are established before and after T6, mainly at R = -1 under uniaxial loading. For all the fatigue test specimens, fracture surfaces analysis shows that it is always a defect that cause fatigue failure. Thus, a criterion is applied to define these critical defects (type, size morphology and position) and the fatigue limit is analyzed through the Kitagawa type diagrams. The role of the building direction on the fatigue strength is studied, before and after T6 heat treatment, for both machined and as-built surfaces. For this purpose, a sketch based on the characteristic grain size is proposed to explain post-T6 orientation effects. The contribution of the precipitation structure is also studied; as well as the role of defects (type, size, morphology and position) on the fatigue limit at different microstructural states: before and after T6. In order to understand the surface fatigue damage mechanisms, the replica method is used on a polished specimen. In this context, a propagation law of natural cracks, that is to say due to a defect inherited from the process, is identified. It makes it possible to separate the initiation and propagation phases, thus feeding the discussions on the phenomena of priming in the presence of defects. In addition, some fatigue criteria are also discussed and the Defect Stress Gradient (DSG) approach is adapted to the studied material, by taking into account the size of the crystallographic grains. In the specific case of specimens with as-built useful sections, the role of the process of suppression of the building supports on the initiation of fatigue cracks is studied; the definition of the concept of defect size in the presence of roughness, at the scale of the surface undulation, is discussed. Knowing that initiation can occurs on a surface undulation or on an isolated defect (porosity or lack-of-fusion), an experimental method is proposed to analyze the competition between these factors. In a context of industrial development, the influence on the fatigue limit of the process parameters, related to the laser (scanning speed, power and hatching distance), or powder bed (chemical composition, particle size, bed thickness) is studied, in order to feed the discussions towards the process optimization regarding the fatigue strength

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Lima, Luis Otavio Ribas de. „Estudo sobre o tratamento térmico de envelhecimento interrompido T6I4-65 e influência na propagação de trinca por fadiga em uma liga de alumínio AA7050“. UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2014. http://tede2.uepg.br/jspui/handle/prefix/1462.

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Made available in DSpace on 2017-07-21T20:43:45Z (GMT). No. of bitstreams: 1 Luis Otavio Ribas Lima.pdf: 8124964 bytes, checksum: d16bc8c64f9e15d57f770b1b271d6b3b (MD5) Previous issue date: 2014-06-18
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Aluminum alloys have been the primary material of choice for the aircraft due to their properties such as low density, high mechanical and corrosion resistance. Commercial aircraft apply aluminum alloys for the fuselage, wings and supporting structure due to the extensive knowledge in design and production of aluminum components, and most importantly, aluminum alloys continue to be developed, keeping it highly competitive. A great development happen with the heat-treatable alloys, which allow improvement of the mechanical properties. Among this alloys stand out the Al-Zn-Mg-Cu series, known for high strength, toughness and corrosion resistance. The improvement of those alloys occurs by the precipitation of nanometric particles MgZn2, called η phase. This study’s aim was to promote an interrupted heat treatment T6I4-65 in an AA7050 aluminum alloy, with fatigue crack growth resistance as priority. Interrupted heat treatments’ goal is optimizing the consumption of solute atoms during process of nucleation and growth of precipitates as a finely dispersion. The T6I4-65 condition obtained was analyzed by differential scanning calorimetry, DSC, optical and electronic microscopy, mechanical tests as hardness, tensile and fatigue crack growth. The T6I4-65 treatment results in a microstructure with a fine dispersion of precipitated phase η’, about 75% smaller than those resulting from in current use, T7451. This microstructure resulted in a reduction of up to 24% in fatigue crack growth rate compared to that resulting from T7451 treatment, keeping the ductility of 17% of area reduction and yield strength higher than 400MPa.
Ligas de alumínio são o principal material de uso na indústria aeronáutica devido a suas propriedades como baixa densidade, alta resistência mecânica e a corrosão. Aeronaves comerciais utilizam ligas de alumínio em sua fuselagem, asas e na estrutura de suporte devido ao extenso conhecimento no projeto e produção de componentes em alumínio, e mais importante, as ligas de alumínio continuam a serem desenvolvidas, mantendo-se altamente competitivas. Ocorreu um grande avanço com o desenvolvimento das ligas tratáveis termicamente, que permitiram a otimização das propriedades mecânicas. Entre estas ligas tratáveis, destaca se a família Al-Zn-Mg-Cu, conhecidas pela alta resistência mecânica, tenacidade e resistência a corrosão. O aperfeiçoamento destas ligas ocorre pela precipitação de partículas nanométricas de MgZn2, conhecida como fase η. O objetivo deste trabalho foi obter um tratamento térmico interrompido T6I4-65 em uma liga de alumínio AA7050 com prioridade ao aumento de resistência à propagação de trinca por fadiga. Tratamentos interrompidos tem por objetivo otimizar o consumo de átomos de soluto durante os processos de nucleação e crescimento dos precipitados endurecedores na liga na forma de dispersão finamente dispersa. A condição T6I4-65 obtida foi analisada por meio de calorimetria diferencial de varredura, DSC, microscopia ótica e eletrônica de varredura e transmissão, ensaios mecânicos dureza, tração e propagação de trinca por fadiga. Este tratamento resultou em uma microestrutura com uma dispersão de finos precipitados de fase η’, cerca de 75% menores que os resultantes de tratamentos de uso corrente, T7451. Esta microestrutura promoveu a redução de até 24% na taxa de propagação de trinca por fadiga em comparação à resultante do tratamento T7451, mantendo grande ductilidade, até 17% de redução de área e limite de escoamento superior a 400MPa.

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HUANG, ZI-WEI, und 黃子葳. „Effects of different aluminum alloys and T6 heat treatment on Tribological properties“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7f8wyz.

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博士
崑山科技大學
機械與能源工程研究所
106
Damage caused by the mechanical parts caused by wear and tear always seriously affect the accuracy of machinery. Hence, it is necessary to improve the material properties of the mechanical elements for mechanical engineers. Furthermore, low friction plays an important role in saving energy. It is important to establish a key technology for wear resistance and low friction through appropriate materials science for related industries. In general, the tribological properties of aluminum alloys are very different from those of steels. Hence, aluminum alloys should be specially considered and clarified for their tribological properties before being applied industrially. This paper therefore aims to further investigate the effects of the content of doping elements on the friction and wear of the selected aluminum alloys. Moreover, effects of T6 heat treatment on Tribological properties are also investigated. From the experimental results, it can be concluded that the higher the silicon content, the smaller the friction coefficient. The higher the content of iron and copper, the more materials are removed, showing better machinability. Moreover, three frictional models and wear mechanisms that describe the effects of the content of doping elements on the friction and wear are proposed. The wear mechanisms change as the silicon content increases, from the junction growth to the wedge and the ploughing particles. By the three models, better choices of aluminum alloys with regards to friction and wear can then be made. These results have great practical importance.

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Hu, Geng-Siang, und 胡耕祥. „Influence of Alloying Elements on Mechanical Properties of Cast Aluminum Alloys by Multi-T6 Heat Treatment“. Thesis, 2018. http://ndltd.ncl.edu.tw/handle/st2xe3.

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碩士
國立臺灣海洋大學
機械與機電工程學系
106
Cast aluminum alloy has good mechanical properties such as strength, hardness…etc, and has the characteristics of light weight. But its components contain with silicon, copper, magnesium and other elements that produced into the compound makes casting ductility poor. Therefore, most of the castings are generally considered that cannot be applied in the application of high breakdown strength, majority application are applied in the appearance of the pieces. The current method to increase the strength of castings is using heat treatment, but it’s not really effectively to enhance the strength and ductility of the casting. In this research used A356 to be the base material. The 0wt%-1wt% of manganese, 0wt%-5wt% of zinc and 0wt%-0.1wt% of strontium add into melt while casting. After manufacturing into ingots, treat with multiple heat treatment to increase the mechanical properties including tensile property, hardness and ductility. The condition of heat treatment included solution treatment with 520°C in twice continuously, quenching before ageing treatment with 170°C, 720 minutes. Two ways of studying after heat treatment, one is about the mechanical properties testing including tensile properties, hardness and ductility. Another is about the microstructure observation. Using the polishing equipment and keller’s reagent to displayed the microstructure of alloy under high magnification microscope. From the experimental results, it is found that the casting with the addition of 0.2wt% of manganese, 5wt% of zinc and 0.03wt% of strontium for 6 hours in T6 heat treatment is the best with the strength of 278.6MPa and the ductility of 3.27%. The hardness can be up to 104.5HBW, the strength can be increased by about 9%, the hardness can be increased by 23% and the ductility by about 34% compared with the A356-T61 alloy.

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Buchteile zum Thema "T6 heat treatment"

Fouad, Yasser. „Effect of Heat Treatment on Fatigue Behavior and Mechanical Properties of Al 7021-T6.“ In Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing, 1017–23. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-48764-9_124.

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He, Youfeng, Xiaojing Xu, Fan Zhang, Daquan Li, Stephen Midson und Qiang Zhu. „Influence of Process Parameters on Blistering during T6 Heat Treatment of Semi-Solid Castings“. In Shape Casting: 5th International Symposium 2014, 27–33. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48130-2_4.

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Fouad, Yasser. „Effect of Heat Treatment on Fatigue Behavior and Mechanical Properties of Al 7021-T6“. In PRICM, 1017–23. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118792148.ch124.

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He, Youfeng, Xiaojing Xu, Fan Zhang, Daquan Li, Stephen Midson und Qiang Zhu. „Influence of Process Parameters on Blistering During T6 Heat Treatment of Semi-Solid Castings“. In Shape Casting: 5th International Symposium 2014, 27–33. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888100.ch4.

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Rosso, Mario, Ildiko Peter und R. Villa. „Effects of T5 and T6 Heat Treatments Applied to Rheocast A356 Parts for Automotive Applications“. In Solid State Phenomena, 237–42. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-59-0.237.

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Pankade, S. B., P. M. Ambad, R. Wahane und C. L. Gogte. „Effect of the Post-weld Heat Treatments on Mechanical and Corrosion Properties of Friction Stir-Welded AA 7075-T6 Aluminium Alloy“. In Lecture Notes on Multidisciplinary Industrial Engineering, 79–94. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0378-4_4.

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Widener, Christian A., Dwight A. Burford, Brijesh Kumar, J. E. Talia und Bryan Tweedy. „Evaluation of Post-Weld Heat Treatments to Restore the Corrosion Resistance of Friction Stir Welded Aluminum Alloy 7075-T73 vs. 7075-T6“. In THERMEC 2006, 3781–88. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.3781.

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Mrówka-Nowotnik, Grażyna. „6XXX Alloys: Chemical Composition and Heat Treatment“. In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000212.

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Analysis of the influence of chemical composition, crystallization process and heat treatment on the phase constituents’ morphology, and mechanical properties and crack resistance of 6xxx Al alloys were conducted. The alloys with low Mg and Si content (6063) in the as-cast state are characterized by presence of Si particles and primary intermetallic phases: α-Al8Fe2Si, β-Al5FeSi, β-Mg2Si, and α-Al(FeMn)Si. Higher Mg, Si, and Mn content (6005 and 6082) leads to separation of additional phase particles: Al6Fe, Al6Mn, and Al12(FeMn)Mg3Si6, whereas high Cu content (6061—0.35% and 6066—0.95%, respectively) is responsible for precipitation of additional phase particles: Q-Al5Cu2Mg8Si6 and θ-Al2Cu. It has been established that homogenization results in total dissolution of the θ-Al2Cu and Q-Al5Cu2Mg8Si6 primary phases and partial dissolution of β-Mg2Si. Needle-like and Chinese-script α-Al8Fe2Si and β-Al5FeSi were transformed into spheroidal α-Al(FeMn)Si particles. The maximal consolidation of the 6xxx alloys is a result of precipitation of metastable particles, the transient βʺ, βʹ, and Qʹ/θʹ phases (6061 alloy) with high dispersion. The highest mechanical properties were achieved after holding in the temperature of 565°C/6 h, supersaturated in water, and aging at 175°C/10–20 h (T6). The decohesion process in the presence of tensile stresses in the room temperature proceeds through nucleation, the growth and joining of the voids, as well as the cracking of the primary and secondary large-sized intermetallic phase particles. The increase of deformation temperature up to 300°C causes the changes of the nucleation source and joining of voids—it occurs mainly along the matrix–particle interface.

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Anil Kumar, V., S. Arjun, R. K. Gupta und P. V. Venkitakrishnan. „Retrogression and Re-aging Heat Treatment: AA7XXX Aluminum Alloys“. In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000213.

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Retrogression and re-aging (RRA) treatment was introduced to increase the stress corrosion cracking (SCC) resistance while retaining the strength attainable in T6 (peak aged) temper. Retrogression is a short-term heat treatment at an elevated temperature wherein a partial dissolution of metastable precipitates occurs, which are responsible for the hardening. During the next step, the material is re-aged in the regime of typical age hardening parameters to restore the strength with improved ductility. Response of RRA treatment has been reported on AA7XXX series Aluminum alloys such as AA7075, AA7050, AA7150, AA7049, and AA7010. Studies have been done on the effect of RRA on microstructure, mechanical properties such as tensile and hardness, corrosion, exfoliation corrosion, and SCC resistance by various researchers. The key characteristic of RRA is retrogression, which makes the re-precipitation in the matrix and coarsening of grain boundary precipitates such as MgZn2, η′. The retrogression treatment however requires high temperature and a short time, which limits the industrial application of RRA, especially in the heat treatment of the components with large cross section, due to the inherent thermal conductivity limitations. Hence, further work needs to be done in this area to apply this specialized heat treatment for industrial applications. This article brings out a comprehension of the changes in microstructure, tensile properties, and corrosion resistance of the various commonly used AA7XXX Aluminum alloys in structural applications with RRA heat treatment. The future scope of the work in RRA heat treatment is also discussed in this article.

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Hernandez-Sandoval, Jacobo, Mohamed H. Abdelaziz, Agnes M. Samue, Herbert W. Doty und Fawzy H. Samuel. „Effect of Zr Addition and Aging Treatment on the Tensile Properties of Al-Si-Cu-Mg Cast Alloys“. In Aluminium Alloys [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.92814.

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The present study focused on the tensile properties at ambient and high temperatures of alloy 354 without and with the addition of zirconium. Tensile tests were performed on alloy samples submitted to various aging treatments, with the aim of understanding the effects of the addition made on the tensile properties of the alloy. Zirconium reacts only with Ti, Si, and Al in the alloys examined to form the phases (Al,Si)2(Zr,Ti) and (Al,Si)3(Zr,Ti). Testing at 25°C reveals that the minimum and maximum quality index values, 259 and 459 MPa, are observed for the as-cast and solution heat-treated conditions, respectively. The yield strength shows a maximum of 345 MPa and a minimum of 80 MPa within the whole range of aging treatments applied. The ultimate tensile and yield strength values obtained at room temperature for T5-treated samples stabilized at 250°C for 200 h are comparable to those of T6-treated samples stabilized under the same conditions, and higher in the case of elevated-temperature (250°C) tensile testing. Coarsening of the strengthening precipitates following such prolonged exposure at 250°C led to noticeable reduction in the strength values, particularly the yield strength, and a remarkable increase in the ductility values.

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Konferenzberichte zum Thema "T6 heat treatment"

Tan, CheeFai, Md Radzai Said und Wei Chen. „The Tensile Strength Effects on Precipitation Heat Treatment of 6061-T6 Aluminum Alloy“. In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87164.

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The paper presents an experimental study on precipitation of 6061-T6 aluminum alloy to determine the effects of artificial ageing on the effect of strength. The precipitation hardening usually undergoes a thermal treatment, which consists of a solution heat treatment (550°C for 1 hour), quenching (water, at room temperature) and artificial ageing. The experimental study is focused on artificial ageing upon which the temperature is varying between 175°C to 420°C at different period of time. The Vickers hardness test was carried out to evaluate the hardness before and after ageing. The optimum ageing time and temperature were also determined at the end of this experiment to obtain reductions in energy and total cost. The study leads to the conclusion that the optimum aged can be achieve within 175°C to 195°C with 2 to 6 hours of ageing time.

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Vivek, Anupam, Steven R. Hansen, Bert C. Liu und Glenn S. Daehn. „Vaporizing Foil Actuator Welding of AA6061 With Cu110: Effect of Heat Treatment Cycles on Mechanical Properties and Microstructure“. In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-4118.

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This work aims to study the effect of microstructure of the weld between aluminum alloy AA6061 and commercially pure copper, Cu 110, on its mechanical properties. AA6061-T6 and T4 aluminum sheets of 1 mm thickness were launched towards copper targets using the Vaporizing Foil Actuator (VFA) tool operating at 8 kJ input energy level. Flyer plate velocities, measured via photonic Doppler velocimetry (PDV), were observed to be approximately 800 m/s. All the welded samples were subjected to instrumented peel testing, microhardness testing, energy-dispersive x-ray spectroscopy (EDS), and SEM. The welded joints had cracks which ran through the continuous intermetallic layers and stopped upon encountering a ductile metallic wave. The welds created with T6 temper flyer sheets were found to have smaller regions with wavy interfaces free of intermetallics as compared to those created with T4 temper flyer sheets. Peel strength tests of the two types of welds resulted in failure along the interface in case of the T6 flyer welds, while the failure generally occurred in the parent aluminum in the case of the T4 flyer welds. Half of the T4 flyer welds were subjected to aging for 18 hours at 160 °C to convert the aluminum sheet back to T6 condition. Although the flyer material did not attain the hardness of the original T6 material, it was found to be significantly stronger than the T4 material. These welds retained their strengths after the aging process and diffusion across the interface was insignificant.

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Smith, Christopher, Zhigang Xu und Jagannathan Sankar. „The Effects of T4 and T6 Heat Treatment on the Corrosion Behavior of MgZnCa Alloys“. In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88196.

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Some of the most important characteristics of a medical implant biomaterial are its corrosion resistance, cytotoxicity, mechanical property, and overall biological performance. Optimizing these characteristics is therefore vital to the success of creating effective medical biomaterials. It is well known that heat treatment processes affect the microstructure of metallic alloys which consequently can have favorable influences on the mechanical properties. The determination of the effects of heat treatment on the corrosion resistance of metallic alloys is another aspect that must be examined. That is the goal of this investigation. The corrosion characteristics of two MgZnCa alloy systems (MgZnCa-31 and MgZnCa-32) were studied to determine the correlation between T4 and T6 heat treatment and the corrosion rate on the alloys. The alloys were produced by melting and casting at 730°C and then heat treated. The corrosion performances of the alloys were examined by both immersion and electrochemical analysis, which were conduct in 0.9% NaCl physiological saline solution. In terms of the effects of the T4 heat treatment, the corrosion rate of the MgZnCa-31 decreases as the time period of the heat treatment increases, whereas the MgZnCa-32 alloys have an opposite effect meaning that the corrosion rate increases as the time period of the heat treatment increases. There was no significant change in corrosion with the introduction of T6 heat treatment to both alloy systems.

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Patel, Dhruv, Chintan Davda, P. S. Solanki und M. J. Keshvani. „Effect of T6 heat treatment on the microstructural and mechanical properties of Al–Si–Cu–Mg alloys“. In INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2015): Proceeding of International Conference on Condensed Matter and Applied Physics. Author(s), 2016. http://dx.doi.org/10.1063/1.4946715.

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Ananthula, Rajeshwar. „Characterization of Retrogression and Re-Aging Heat Treatment of AA7075-T6 Using Nonlinear Acoustics and Eddy Current“. In QUANTITATIVE NONDESTRUCTIVE EVALUATION. AIP, 2004. http://dx.doi.org/10.1063/1.1711742.

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Fooladfar, Hamidreza, Babak Hashemi und Mousa Younesi. „The Effect of Surface Over-Aging on the Strength and SCC Susceptibility of 7075 Aluminum Alloy“. In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-13147.

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A novel heat treatment procedure combining the shot-peening with a two-step aging operation was proposed to improve both the strength and the stress corrosion cracking (SCC) resistance of the high-strength 7075 aluminium alloy. The heat treatment included one shot-peening stage before or between the two stages of aging at 120°C for 24 h and at 160°C for 1 h, respectively. The mechanical properties obtained during the aforementioned operations were extremely similar to those of the T6 sample owing to the unaffected bulk microstructure over such a low over-aging period. The SCC resistance of these samples was considerably improved, compared to that of the T6 sample and of the conventional shot-peened T6 sample due to the over-aging of the surface like the T7 treatment leading from the diffusion acceleration by the dislocations generated in the surface layer during shot-peening. In spite of the further depth of deformation caused by shot-peening prior to the first step of aging, the sample shot-peened after the first step of aging showed no significant decrease in the SCC resistance because of its higher generated dislocation by shot-peening.

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LUCIAN, Ciprian Pavel, Ion MITELEA, Ion Dragoş UŢU und Corneliu Marius Crăciunescu. „Effects of post weld heat treatment (PWHT) on mechanical properties and microstructure of EN AW-6082 T6 aluminum alloy“. In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.741.

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Zhenglong, Liang, und Zhang Qi. „Simulation and Experiment Research on Squeeze Casting Combined With Forging of Automobile Control Arm“. In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86006.

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Aim to improve mechanical properties of the casting aluminum components, a novel process that combined squeeze casting with local forging was proposed. THERCAST® and FORGE® were used to simulate the combined forming process of the automobile control arm. The effects of pouring rate, forging temperature and T6 heat treatment on microstructure evolution and mechanical properties of the samples formed by this combined process were investigated. The results showed that the pouring rate and forging temperature have a negligible effect on microstructure of those samples. The combined process of squeeze casting and forging could obviously refine microstructure, eliminate porosity and improve micro-hardness. After T6 heat treatment, the Si particles were dramatically spheroidized, and the micro-hardness was improved.

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Arhami, M., F. Sarioglu und A. Kalkanli. „Effect of Heat-Treatment and Reinforcement With Silicon Carbide on the Microstructure and Mechanical Properties of AlFeVSi Alloy“. In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42073.

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The aging response of Al-Fe-V-Si composite was compared with the un-reinforced alloy. The effects of solutionizing time, alloying element and SiC reinforcement on the age hardening response, microstructure and mechanical properties of these alloy and its composites was also investigated. The study was performed by T6 heat treatment at three different solutionizing times. Room temperature tensile testing was conducted for peak aged specimens to determine the effect of this heat treatment on the strength of squeezed cast un-reinforced and reinforced Al-Fe-V-Si alloy with SiC particles. The presence of SiC particles accelerated the aging kinetics of the composites compared to the unreinforced alloys. The time to reach peak age hardness was decreased by addition of SiCp. Mainly two different Fe-intermetallics; small α-Al7(Fe, V)3Si and large β-Al18Fe11Si phases were present in the system studied. The fracture surfaces of composites revealed decohesion of SiC particles from the matrix and cracking of needle like-β intermetallics was observed.

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Iswanto, Priyo Tri, Hasan Akhyar, Viktor Malau, Suyitno und Reza Wirawan. „Effect of T6 heat treatment and artificial aging on mechanics and fatigue properties of A356.0 aluminum alloy produced by 350 rpm centrifugal casting“. In 2016 6th International Annual Engineering Seminar (InAES). IEEE, 2016. http://dx.doi.org/10.1109/inaes.2016.7821938.

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