Journal articles: 'Aluminum alloys – Mechanical properties'

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Zhou, Jia, Jun Ping Zhang, and Ming Tu Ma. "Study on the Formability of Aluminium Alloy Sheets at Room and Elevated Temperatures." Materials Science Forum 877 (November 2016): 393–99. http://dx.doi.org/10.4028/www.scientific.net/msf.877.393.

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This paper presents the main achievements of a research project aimed at investigating the applicability of the hot stamping technology to non heat treatable aluminium alloys of the 5052 H32 and heat treatable aluminium alloys of the 6016 T4P after six months natural aging. The formability and mechanical properties of 5052 H32 and 6016 T4P aluminum alloy sheets after six months natural aging under different temperature conditions were studied, the processing characteristics and potential of the two aluminium alloy at room and elevated temperature were investigated. The results indicated that the 6016 aluminum alloy sheet exhibit better mechanical properties at room temperature. 5052 H32 aluminum alloy sheet shows better formability at elevated temperature, and it has higher potential to increase formability by raising the temperature.

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Kucharčík, L., M. Brůna, and A. Sládek. "Influence of Chemical Composition on Porosity in Aluminium Alloys." Archives of Foundry Engineering 14, no. 2 (June 1, 2014): 5–8. http://dx.doi.org/10.2478/afe-2014-0026.

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Abstract Porosity is one of the major defects in aluminum castings, which results is a decrease of a mechanical properties. Porosity in aluminum alloys is caused by solidification shrinkage and gas segregation. The final amount of porosity in aluminium castings is mostly influenced by several factors, as amount of hydrogen in molten aluminium alloy, cooling rate, melt temperature, mold material, or solidification interval. This article deals with effect of chemical composition on porosity in Al-Si aluminum alloys. For experiment was used Pure aluminum and four alloys: AlSi6Cu4, AlSi7Mg0, 3, AlSi9Cu1, AlSi10MgCu1.

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Last, H. R., and R. K. Garrett. "Mechanical behavior and properties of mechanically alloyed aluminum alloys." Metallurgical and Materials Transactions A 27, no. 3 (March 1996): 737–45. http://dx.doi.org/10.1007/bf02648961.

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Hernández-Méndez, F., A. Altamirano-Torres, José G. Miranda-Hernández, Eduardo Térres-Rojas, and Enrique Rocha-Rangel. "Effect of Nickel Addition on Microstructure and Mechanical Properties of Aluminum-Based Alloys." Materials Science Forum 691 (June 2011): 10–14. http://dx.doi.org/10.4028/www.scientific.net/msf.691.10.

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In this work a comparative study between microstructure and mechanical properties of aluminum-nickel alloys with different contents of nickel was carried out. Alloys were produced by powders metallurgy. Characterization results indicates that the microstructure of the aluminum-nickel alloys present a thin and homogeneous distribution of an intermetallic compound in the aluminum’s matrix, identified as Al3Ni. Furthermore, it was find out that the amount of intermetallic Al3Ni increase as the nickel content in the alloy rises. Regarding the mechanical properties evaluated; it was establishes that the hardness, compression and flexion resistances also were improved due to the presence of the intermetallic compound.

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Zhao, Xuehang, Haifeng Li, Tong Chen, Bao’an Cao, and Xia Li. "Mechanical Properties of Aluminum Alloys under Low-Cycle Fatigue Loading." Materials 12, no. 13 (June 27, 2019): 2064. http://dx.doi.org/10.3390/ma12132064.

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In this paper, the mechanical properties of 36 aluminum alloy specimens subjected to repeated tensile loading were tested. The failure characteristics, stress-strain hysteresis curves and its corresponding skeleton curves, stress cycle characteristics, and hysteretic energy of specimens were analyzed in detail. Furthermore, the finite element model of aluminum alloy specimens under low-cycle fatigue loading was established and compared with the experimental results. The effects of specimen parallel length, parallel diameter, and repeated loading patterns on the mechanical properties of aluminum alloys were discussed. The results show that when the specimen is monotonously stretched to fracture, the failure result from shearing break. When the specimen is repeatedly stretched to failure, the fracture of the specimen is a result of the combined action of tensile stress and plastic fatigue damage. The AA6061, AA7075, and AA6063 aluminum alloys all show cyclic softening characteristics under repeated loading. When the initial stress amplitude of repeated loading is greater than 2.5%, the repeated tensile loading has a detrimental effect on the deformability of the aluminum alloy. Finally, based on experiment research as well as the results of the numerical analysis, the calculation method for the tensile strength of aluminum alloys under low-cycle fatigue loading was proposed.

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Mamala, A., and W. Sciężor. "Evaluation of the Effect of Selected Alloying Elements on the Mechanical and Electrical Aluminium Properties." Archives of Metallurgy and Materials 59, no. 1 (March 1, 2014): 413–17. http://dx.doi.org/10.2478/amm-2014-0069.

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Abstract Modern industry expects aluminum products with new, unusual, and well-defined functional properties. Last years we are able to notice constant development of aluminium alloys. In food industry, power engineering, electrical engineering and building engineering, flat rolled products of 1XXX series aluminium alloys are used.8XXX series alloys registered in Aluminium Association during last 20 years may be used as an alternative. These alloys have very good thermal and electrical conductivity and perfect technological formability. Moreover, these materials are able to obtain by aluminium scrap recycling. Fundamental alloy additives of 8XXX series are Fe, Si, Mn, Mg, Cu and Zn. Aluminium alloying with these additives makes it possible to obtain materials with different mechanical ale electrical properties. In this paper, the analysis of alloy elements content (in 8XXX series) effect on chosen properties of material in as cast and after thermal treatment tempers has been presented.

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Araújo Filho, Oscar Olimpio, Alexandre Douglas Araújo de Moura, Everthon Rodrigues de Araújo, Maurílio José dos Santos, Cezar Henrique Gonzalez, and Flávio José da Silva. "Manufacturing and Characterization of AA1100 Aluminum Alloy Metal Matrix Composites Reinforced by Silicon Carbide and Alumina Processed by Powder Metallurgy." Materials Science Forum 869 (August 2016): 447–51. http://dx.doi.org/10.4028/www.scientific.net/msf.869.447.

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Powder Metallurgy (PM) Techniques consists in a suitable technique to process composites materials. A specific PM technique of mechanical alloying developed to produce new materials in the solid state is a consolidated route to obtain aluminum alloys metal matrix composites. Aluminum alloys metal matrix composites allies the good properties of aluminum and its alloys but with poor mechanical properties and the reinforcement of ceramics phases which add better mechanical properties to these alloys. The research of this materials processing by PM techniques presented new materials with improved properties. In this work an AA1100 aluminum alloy was reinforced by particulate silicon carbide and alumina types of ceramic phases. The powders were mixed and then processed by mechanical alloying in a SPEX vibratory type mill. Then the powders obtained were compacted and vacuum sintered. The sintered composites were characterized by means of Scanning Electron Microscopy (SEM) plus Energy Dispersive Spectroscopy (EDS) and Vickers hardness (HV) tests to evaluate the mechanical behavior.

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Bezerra, Carlos Augusto, Alexandre Douglas Araújo de Moura, Edval Gonçalves de Araújo, Maurílio José dos Santos, and Oscar Olimpio de Araújo Filho. "Features of the Processing of AA2124 Aluminum Alloy Metal Matrix Composites Reinforced by Silicon Nitride Prepared by Powder Metallurgy Techniques." Materials Science Forum 802 (December 2014): 108–13. http://dx.doi.org/10.4028/www.scientific.net/msf.802.108.

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Powder Metallurgy (PM) Techniques consists in a suitable technique to process composites materials. A specific PM technique of mechanical alloying developed to produce new materials in the solid state is a well known route to obtain aluminum alloys metal matrix composites. Aluminum alloys metal matrix composites allies the good properties of aluminum and its alloys but with poor mechanical properties and the reinforcement of ceramics phases which add better mechanical properties to these alloys. The research of this materials processing by PM techniques presented new materials with improved properties. In this work an AA2124 aluminum alloy was reforced by particulated silicon nitride a kind of ceramic phase. The powders were mixed and then processed by mechanical alloying in a SPEX vibratory type mill. Then the powders obtained were compacted and vacuum sintered. The sintered composites were characterized by means of Scanning Electron Microscopy (SEM) plus Energy Dispersive Spectroscopy (EDS) and Vickers hardness tests to evaluate the mechanical behavior.

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Shen, Hua, He Liang, Wei Dong Yang, Guang Chun Yao, and Chuan Sheng Wang. "Effect of Y on Microstructure and Mechanical Properties of Aluminium Alloy." Applied Mechanics and Materials 421 (September 2013): 250–54. http://dx.doi.org/10.4028/www.scientific.net/amm.421.250.

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The effects of yttrium (Y) on microstructures and mechanical properties of aluminium alloy were investigated in detail by scanning electronic microscope (SEM), energy dispersive spectrum (EDS),X-ray diffraction and tensile test. The results show that the trend of alloys tensile strength and elongation with increasing of the Y content is a broken line. When the Y content is increased up to 0.30%, the tensile strength and elongation are 105MPa and 10.50% respectively, meanwhile, the fractograph exhibited typical ductile dimple fracture pattern. Then the alloy performance is best. The high strength of aluminum alloy is attributed to the size of Al2Y phase. Addition of Y above 0.30% in aluminum alloy may generate more the coarse Al2Y particle. It can induce the decrease in the material performance.

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Fan, Yang Yang, and Makhlouf M. Makhlouf. "Castable Aluminium Alloys for High Temperature Applications." Materials Science Forum 765 (July 2013): 8–12. http://dx.doi.org/10.4028/www.scientific.net/msf.765.8.

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Most traditional aluminium casting alloys are based on the aluminium-silicon eutectic system because of its excellent casting characteristics. However, the solidus in this system does not exceed 577 °C and the major alloying elements used with silicon in these alloys have high diffusivity in aluminium. Therefore, while these elements enhance the room temperature strength of the alloy, they are not useful at elevated temperatures. Considering nickel-base superalloys, whose mechanical properties are retained up to temperatures that approach 75% of their melting point, it is conceivable that castable aluminium alloys can be developed on the same basis so that they are useful at temperatures approaching 300 °C. In this publication, we present the thought process behind developing a new castable aluminum alloy that is designed specifically for such high temperature applications and we present the alloy’s measured castability characteristics and its elevated temperature tensile properties.

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11

Valikhov, Vladimir, Nikolay Kahidze, Anton Khrustalyov, Ilya Zhukov, and Alexander Vorozhtsov. "Investigation of structure, mechanical properties and crystallization of aluminum alloys containing aluminum oxide nanoparticles." MATEC Web of Conferences 243 (2018): 00022. http://dx.doi.org/10.1051/matecconf/201824300022.

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A357 and 6082 aluminum alloys strengthened by aluminum nitride nanoparticles were obtained. The process of crystallization of the A357-0.5 wt% Al2O3 and 6082-0.5 wt% Al2O3 alloys was studied under conditions of varying the cooling rate. The A357 and 6082 aluminum alloy structure and hardness were analyzed for the Al2O3 content from 0 to 1 wt%.

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Öksüz, K. Emre, Hanlar Bağirov, Mehmet Şimşir, Ceyhun Karpuzoğlu, Aykut Özbölük, Yusuf Z. Demirhan, and Hayrettin U. Bilgin. "Investigation of Mechanical Properties and Microstructure of AA2024 and AA7075." Applied Mechanics and Materials 390 (August 2013): 547–51. http://dx.doi.org/10.4028/www.scientific.net/amm.390.547.

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Aluminum alloys have been extensively used as structural material due to its high strength and damage-tolerance. Alloy 6061, 2024 and 7075 are engineered to be lightweight and strong,and their ease of formability allows complex shapes and drawn parts,which can then be further enhanced with heat treating. In this study is aimed to improve the mechanical properties of aluminum alloys by heat treatment.AA2024 and AA7075 were selected and each alone at T3 and T6 temper conditions has been studied respectively.For the mechanical properties of AA2024 and AA7075 alloyshardness, fatigue behavior, tensile test and charpy impact test with standard V notched specimens at RTand-5 °C were analysed in the present study. Microstructural characterization has been done using standard metallography.

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13

Mofidi Tabatabaei, Hamed, Ryuji Ishikawa, and Tadashi Nishihara. "Mechanical Interlocking of an Aluminum Alloy and SS400 Structural Steel through Friction-Stir Spot Forming (FSSF)." Materials Science Forum 926 (July 2018): 17–22. http://dx.doi.org/10.4028/www.scientific.net/msf.926.17.

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In the present study, a novel method for mechanically interlocking the dissimilar alloys of A6061-T6 aluminum alloy and SS400 structural steel using friction-stir forming (FSF) is suggested. In this study, the aluminum alloy is placed on top of a steel sheet containing a screwed hole. The present study suggests that friction-stir spot forming (FSSF) can be used to form a mechanical interlock between the aluminum alloy and steel sheet. FSSF is conducted on top of the aluminum alloy, which produces sufficient heat to plasticize the aluminum alloy. This results in a flow of aluminum into the screw hole in the steel, due to the plastic deformation, thereby mechanically interlocking the aluminum with the steel. Moreover, with the proposed method, the authors present a new concept of an easily separable joining of dissimilar alloys. The mechanical properties of the developed interlock are investigated through tensile and hardness tests and microstructural observation.

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14

Mandley, Varinder, and Mamta Janagal. "Methodology to Reduce Casting Defects of Alluminium alloy using Post Heat Treatment." CGC International Journal of Contemporary Technology and Research 2, no. 1 (December 30, 2019): 77–80. http://dx.doi.org/10.46860/cgcijctr.2019.12.20.77.

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In early years with the expansion of industries and growth of technology, the usage of aluminum and its alloys is also expanding. Therefore It is additionally utilized in aviation and vehicle industries because of their low thickness, good hardness property, great mechanical properties, better consumption opposition and low coefficient of extension when compared with other metals and alloy. The initial step of assembling in the aluminum combinations begins with the throwing strategy in light of the fact that the underlying throwing structure importantly affects the achievement of thermo-mechanical properties. The initial step of manufacturing in the aluminium alloys is the casting method . The casting structure has an important effect on the success of thermo-mechanical properties. The quality of aluminum amalgams can be dictated by its size and microstructure highlights of circulation all through the throwing procedure. In this way, it is essential to characterize throwing parameters of the aluminum compounds examples for controlling the microstructure properties and throwing abandons. This paper depends on the strategy to evacuate throwing abandons and improve the hardness of the aluminum composites.

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Khmeleva, Marina, Anton Khrustalev, and Alexander Vorozhtsov. "Structure and mechanical properties of A356-C alloys." MATEC Web of Conferences 243 (2018): 00024. http://dx.doi.org/10.1051/matecconf/201824300024.

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The paper deals with influence of mechanical mixing and vibration treatment on the structure and mechanical characteristics of the aluminum alloy containing ≤ 1 wt.% of nanodiamonds (A356-C). The alloy was obtained from industrial A356 Al-Si casting alloy by means of an integrated effect of mechanical mixing and vibration. It has been shown that the introduction of nanodiamond particles contributes to improving the alloy structure and increasing its mechanical tensile properties. The structure of the A356 aluminum alloy has been refined with introduction of 0.2 wt% nanodiamonds and application of vibration melt treatment. The introduction of nanodiamonds into the melt and the vibration melt treatment enable one to increase the yield strength and tensile strength of the A356 aluminum alloy without any change in ductility.

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YOSHINO, Masaki, Hiroyoshi IWANARI, Mitsuo NIINOMI, and Toshiro KOBAYASHI. "Mechanical properties of SiC whisker reinforced aluminum alloys." Journal of Japan Institute of Light Metals 38, no. 10 (1988): 593–99. http://dx.doi.org/10.2464/jilm.38.593.

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MIZUTANI, Hideyuki, Hisakimi NOTOYA, Shigeru YAMADA, Akira TAKAYANAGI, and Kenjiro OKAMURA. "Mechanical properties and machinability of various aluminum alloys." Journal of Japan Institute of Light Metals 44, no. 1 (1994): 16–21. http://dx.doi.org/10.2464/jilm.44.16.

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18

Rajulapati, K. V., R. O. Scattergood, K. L. Murty, Z. Horita, T. G. Langdon, and C. C. Koch. "Mechanical Properties of Bulk Nanocrystalline Aluminum-Tungsten Alloys." Metallurgical and Materials Transactions A 39, no. 10 (July 16, 2008): 2528–34. http://dx.doi.org/10.1007/s11661-008-9593-3.

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19

Mounika, G. "Closed Loop Reactive Power Compensation on a Single-Phase Transmission Line." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 20, 2021): 2156–59. http://dx.doi.org/10.22214/ijraset.2021.35489.

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Zinc-aluminium alloys are alloys whose main ingredients stay zinc and aluminium. Other alloying elements clasp magnesium and copper .Zinc Aluminum Alloys over the past decayed are occupying attention of both researches and industries as a promising material for tribological applications. At this moment commercially available Zinc-Aluminium alloys and bearing bronzes due to good cost ability and unique combination of properties. They can also be deliberated as competing material for cast iron, plastics and even for steels. It has been shown that the addition of alloying elements including copper, silicon, magnesium, manganese and nickel can improve the mechanical and tribological properties of zinc aluminum alloys. This alloy has still found limited applications encompassing high stress conditions due to its lower creep resistance, compared to traditional aluminum alloys and other structural materials. This has resulted in major loss of market potential for those alloy otherwise it is excellent material. The aim of this paper is to measure the coefficient of friction and wear under different operating conditions for material with silicon content. Then wear equation will be found out for all the materials experimented under various conditions. In this paper there is discussion of the effect of Silicon on tribological properties of aluminium based Zinc alloy by experiment as well as Ansys software based and compares the same.

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Lee, Ho Sung, Jong Hoon Yoon, Joon Tae Yoo, and Kyung Ju Min. "Microstructure and Mechanical Properties of Friction Stir Welded AA2195-T0." Materials Science Forum 857 (May 2016): 266–70. http://dx.doi.org/10.4028/www.scientific.net/msf.857.266.

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Aluminum-copper-lithium alloy is a light weight metal that has been used as substitute for conventional aerospace aluminum alloys. With addition of Li element, it has lower density but higher strength. However these aluminum alloys are hard to weld by conventional fusion welding, since they often produce porosities and cracking in the weld zone. It is known that solid state welding like friction stir welding is appropriate for joining of this alloy. In this study, friction stir welding was performed on AA2195 sheets, in butt joint configuration in order to understand effects of process parameters on microstructure and mechanical properties in the weld zone. The results include the microstructural change after friction stir welding with electron microscopic analysis of precipitates.

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Kumar, Mukesh, Muhammad Moazam Baloch, Muhammad Ishaque Abro, Sikandar Ali Memon, and Ali Dad Chandio. "Effect of Artificial Aging Temperature on Mechanical Properties of 6061 Aluminum Alloy." January 2019 38, no. 1 (January 1, 2019): 31–36. http://dx.doi.org/10.22581/muet1982.1901.03.

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Aluminum alloys have been attracted by several engineering sectors due to their excellent strengthweight ratio and corrosion resistant properties. These are categorized into 1, 2, 3, 4, 5, 6, 7and 8xxx on the basis of alloying elements. Among these 6xxx series contains aluminum–magnesium–silicon as alloying elements and are widely used in extruded products and automotive body panels. The major advantages of these alloys are good corrosion resistance, medium strength, low cost, age hardening response no yield point phenomenon and Ludering. 6xxx series alloys generally have lower formability than other aluminum alloys which restrict their utilization for wide applications. Keeping in view of the shortcomings in the set of mechanical properties of 6xxx series the efforts were made to improve the tensile strength and toughness properties through age hardening. In present study heat treatment cycles were studied for 6061 aluminum alloy. Three different age hardening temperatures 160, 200 and 240oC were selected. The obtained results showed that 17.26, 7.69, and 10.51% improvement in tensile strength, toughness and hardness respectively was achieved with solution treatment at 380oC followed by an aging 240oC. Microstructural study revealed that substantial improvements in the mechanical properties of 6061 aluminum alloy under heat treatment were achieved due to precipitation of Mg2Si secondary phase.

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Emri, Igor, and Drago Kovačič. "Expert system for testing mechanical properties of aluminum and aluminum alloys." Expert Systems with Applications 12, no. 4 (May 1997): 473–82. http://dx.doi.org/10.1016/s0957-4174(97)00007-9.

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Shalomeev, V., and О. Lukianenko. "The influence of aluminum on the formation of the hardening phase in magnesium alloys." Innovative Materials and Technologies in Metallurgy and Mechanical Engineering, no. 1 (September 14, 2021): 14–18. http://dx.doi.org/10.15588/1607-6885-2021-2-2.

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Purpose. Study of the effect of alloying with aluminum on structure formation, mechanical properties and heat resistance of magnesium alloys Research methods. Methods of metallographic and micro X-ray spectral analysis. Determination of mechanical properties and heat resistance. Results. The regularities of the influence of alloying with aluminum on the formation of the hardening phase in magnesium alloys have been investigated. It is shown that an increase in the concentration of aluminum in magnesium alloy promotes refinement of the macro- and microstructure of the metal (reduces the grain size and the distance between the second-order dendritic axes) and also increases the amount of intermetallic phase. The positive effect of aluminum additives on the mechanical properties and heat resistance of cast metal has been established. The optimal level of alloying with aluminum (about 7,7 %) hes been determined, which ensures a sufficient level of mechanical properties and heat resistence. Scientific novelty. Based on the regression analysis of the experimental data, empirical equations were obtained that describe the dependences of the size of macro- and micrograins on the concentration of aluminum in magnesium alloys. It is shown that the optimal aluminum content in the magnesium alloy in the amount of ~ 7,7 % provides the best combination of mechanical properties (a sufficiently high strength and the highest plasticity) and heat resistance Practical value. It has been established that alloying magnesium alloys with aluminum is promising for improving the structure and increasing the mechanical properties and heat resistance of cast metal. This effect makes it possible to significantly expand the field of application of magnesium alloys in mechanical engineering and improve the performance of various equipment.

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Medlen, D., and D. Bolibruchova. "The Influence of Remelting on the Properties of AlSi6Cu4 Alloy Modified by Antimony." Archives of Foundry Engineering 12, no. 1 (January 1, 2012): 81–86. http://dx.doi.org/10.2478/v10266-012-0016-y.

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The Influence of Remelting on the Properties of AlSi6Cu4 Alloy Modified by Antimony The paper deals with the problem of multiple remelting influence on AlSi6Cu4 alloy modified by antimony on chosen mechanical characteristics, microstructure and gas content. This foundry alloy is used mostly in automotive industry. Foundry Aluminum-Silicon alloys are also used in number of industrial weight sensitive applications because of their low weight and very good castability and good mechanical properties. Modifiers are usually added to molten aluminum-silicon alloys to refine the eutectic phase particle shape and improve the mechanical properties of the final cast products and Al-Si alloys cast properties.

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Wang, Wei Wei, Bin Bin Jia, and Jing Bo Yu. "Microstructure Evolution and Mechanical Properties of 7A09 Aluminum Alloy during Rapid Solidifications." Advanced Materials Research 79-82 (August 2009): 1791–94. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1791.

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Microstructure evolution and mechanical properties of 7A09 aluminum alloy ribbon prepared by rapid cooling solidification are studied. Single roller is applied to produce rapid solidification ribbon of 7A09 aluminum alloys. Microstructure characteristics and mechanical properties of the rapid solidified ribbon of 7A09 aluminum alloys are studied by means of X-ray diffraction (XRD), scan electron microscopy (SEM) and hardness measurement. The results show that the rotate speed of the roller is the key factor affecting the ability of the forming ribbon. At a roller rotate speed of 1500rpm, the ribbon with a good quality can be obtained. Microstructure features of the rapid solidification ribbon are refined with the increase of the cooling rate, all of the crystals translate into nanocrystalline. All the hardness of the rapid solidification ribbon of 7A09 aluminum alloys is higher than that of the original alloys and increases with the rotate speed of the rotor.

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Ienaga, Yuichi. "Mechanical Properties of Large-Scale Extruded Mg-Zn-Y Alloys." Materials Science Forum 638-642 (January 2010): 1541–45. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1541.

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In order to realize large-scale Mg-Zn-Y alloys with high strength and high heat resistance, we have developed a unique casting process to produce a large homogeneous ingot investigating the mechanical properties of the extruded alloys. First homogeneous ingots (335 mm x 850 mm) were prepared by a unique stir casting process. Then large-scale extruded alloys (100 mm) were prepared at 648 K with the extrusion ratio of 10. The Mg-Zn-Y alloys have exhibited higher yield and fatigue strengths than those of aluminum alloys. The yield strengths of the aluminum alloys have decreased drastically above 473 K, whereas those of the Mg-Zn-Y alloys have not. It is noteworthy that the yield strength (200 MPa) and the fatigue strength (75 MPa) of the Mg-Zn-Y alloys at 523 K are about twice and 1.2-1.4 times as high as those of the aluminum alloys respectively. Moreover, the creep strengths have been equivalent or higher than those of aluminum alloys. From the above results, we have verified that even being made by the large-scale extrusion, the Mg-Zn-Y alloys possess higher strength than those of heat resistant aluminum alloys.

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Khatami, Neda, Shamsoddin Mirdamadi, and Hekmat Razavizadeh. "The Boron Effect on Mechanical Properties of Aged 2024 Aluminum Alloy." Advanced Materials Research 339 (September 2011): 152–56. http://dx.doi.org/10.4028/www.scientific.net/amr.339.152.

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2024 Aluminum Alloy is widely used in aeronautical applications. The Alloy's strength is increased by Precipitation Hardening which is the aging and solution of strength and is widely used in T6 state. Bearing in mind the effect of Boron in shorting the aging time, the pure material of B2O3 was used in order to add Boron to 2024 Alloy, so Alloying was done. By testing mechanical properties and microstructure observations, good results were achieved in Boron effect on this alloy's quench in comparison with those alloys lacking Boron. The outcomes depicted that this element addition increases hardness and tensile strength in aging process. In a way that the hardness of the alloy after controlled quench in one hour natural aging was reached to 93HB from 73HB and to 134HB in one hour artificial aging in 110°C. Such difference in hardness amount is due to better distribution of precipitates.

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Kumar, J. Suresh, M. Siva, N. Suneel Kumar, CH V. V. S. S. R. Krishna Murthy, and V. V. Ravi Kumar. "Forming of AA2xxx and AA7xxx Sheet Alloys and their Studies on Microstructural and Mechanical Properties of Cold and Cryo Rolled Aluminum Alloys." Materials Science Forum 969 (August 2019): 546–51. http://dx.doi.org/10.4028/www.scientific.net/msf.969.546.

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High strength aluminum alloys will enhancing mechanical properties always plays a major role in controlling microstructure of cast and processed alloy. The desire for more efficient aircraft materials has fueled research of aluminum AA-2xxx and AA7xxx alloys. In these alloys were rolled at cold rolling and at cryorolling to 80 % thickness reductions and an attempt was made to evaluate the optical-microstructural variation and the variation in tensile properties of these aluminum alloys. Cryorolled alloy also exhibited better hardness and strength compared to cold alloy due to suppressed thermal recovery. Coldrolled alloy showed more necking percentage compared to cryorolled for rolling reductions of 80% and more formability was observed.

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Al nefawy, Mohamad Yehea, Fouad El dahiye, and Mahmoud Al Assaad. "The Effect of Heat Treatments and Nickel Additive on The Microstructure and Tensile Properties of 7075 Aluminum Alloy." Association of Arab Universities Journal of Engineering Sciences 27, no. 2 (June 30, 2020): 154–61. http://dx.doi.org/10.33261/jaaru.2020.27.2.014.

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The aluminum alloys of the 7xxx series consist of Al with Zn mainly, Mg and Cu. 7xxx aluminum alloys has high mechanical properties making it distinct from other aluminum alloys. The effect of adding Nickel and heat treatments on the microstructure, formed phases and tensile properties of the 7075 aluminum alloy were studied in this paper. Different percentages of nickel [0.1, 0.5, 1] wt% was added to 7075 Aluminum alloy, and various heat treatments (artificial aging T6 and Retrogression and re-aging RRA) was applied on the 7075 alloys that containing nickel. The results obtained by applying of RRA treatment were better than the results of T6 treatment, the tensile properties increased and the microstructure became softer by adding nickel to the studied alloys. The maximum tensile strength of 7075 aluminum alloy was (UTS = 437 Mpa) when RRA heat treatment was applied and 0.5% nickel was added.

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Ahmadi, Shahram, Ali Shokuhfar, and Arash Rezaei. "Investigation of the Effects of GP Zones Formation on the Properties of AA2090 Alloy." Defect and Diffusion Forum 273-276 (February 2008): 18–21. http://dx.doi.org/10.4028/www.scientific.net/ddf.273-276.18.

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To respond the need of industries to the new materials with higher specific modulus and lower density than those of the older Al alloys, aluminum- lithium alloys have been invented and improved. Aging process is one of the most important methods to improve the mechanical properties of aluminum- lithium alloys which are in the heat treatable category of aluminum alloys. Low temperature and natural aging processes cause the "short range diffusion" of Cu atoms in the aluminum and the formation of the GP zones. In this research, stability of GP zones and the effects of these areas on physical and mechanical properties of AA2090 alloy were investigated by hardness, electrical resistance, DSC (differential scanning calorimetric) and tensile tests. Results show that endothermic effect in the DSC diagrams of AA2090 alloy at 180°C to 240°C can be related to the enthalpy of GP zones dissolution. Formation of GP zones in the structure increases hardness, tensile strength and electrical resistance of Al- Li C u (2090) alloys.

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Kutuev, R. A., Victor A. Sozaev, and A. Kh Shermetov. "Surface Properties of Copper-Aluminum Alloys." Materials Science Forum 1022 (February 2021): 224–28. http://dx.doi.org/10.4028/www.scientific.net/msf.1022.224.

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The polytherms of density, surface tension of the Cu-Al system melts and wetting angles of Ni-Cr, Co-Cr substrates, 25X18H9C2 stainless steel and titanium were studied by the sessile drop method. The drop contour was processed by dint of current information technologies, in particular, using the ImageJ software package [1]. The equations of density polytherms and surface tension of the Cu-Al system melts were established. It was shown that Cu-Al melts wet the substrates at 1000 K and more. We revealed the features of temperature dependences of the wetting angles.

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Ozel, Kaan, Cem S. Cetinarslan, and Mumin Sahin. "Mechanical properties of friction stir welded 5083 aluminum alloys." Materials Testing 59, no. 1 (January 5, 2017): 64–68. http://dx.doi.org/10.3139/120.110965.

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Kim, Hyoung Seop, P. J. Warren, B. Cantor, and H. R. Lee. "Mechanical properties of partially crystallized aluminum based amorphous alloys." Nanostructured Materials 11, no. 2 (March 1999): 241–47. http://dx.doi.org/10.1016/s0965-9773(99)00037-9.

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Zhdanov, A., A. Voznesenskaya, L. Belyaev, and E. Novikova. "Research of Physical and Mechanical Properties of Aluminum Alloys." Journal of Physics: Conference Series 1626 (October 2020): 012165. http://dx.doi.org/10.1088/1742-6596/1626/1/012165.

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Milman,, Yu V. "Scandium Effect on Increasing Mechanical Properties of Aluminum Alloys." High Temperature Materials and Processes 25, no. 1-2 (April 2006): 1–10. http://dx.doi.org/10.1515/htmp.2006.25.1-2.1.

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TADENUMA, Hiroki, Yuki NAKAJIMA, Jun’ya KOBAYASHI, Shigeru KURAMOTO, Goroh ITOH, Ichiro AOI, and Yoshihiro SHIMIZU. "Mechanical properties of cold-rolled 7000 series aluminum alloys." Proceedings of Ibaraki District Conference 2017.25 (2017): 425. http://dx.doi.org/10.1299/jsmeibaraki.2017.25.425.

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Krainikov, A. V., and O. D. Neikov. "Rapidly Solidified High-Temperature Aluminum Alloys. II. Mechanical Properties." Powder Metallurgy and Metal Ceramics 51, no. 9-10 (January 2013): 554–65. http://dx.doi.org/10.1007/s11106-013-9467-0.

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Wang, Nan, Tomiko Yamaguchi, and Kazumasa Nishio. "Effects of Welding Time and Alloy Elements on Mechanical Properties of Aluminum/SPCC Joint Using Resistance Spot Welding." Advanced Materials Research 602-604 (December 2012): 2123–29. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.2123.

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In this study, effects of welding time and elements Mg, Si and Cu in aluminum alloys on hardness and tensile shear strength of aluminum alloys/steel joints in resistance spot welding have been investigated. The welding current was kept a constant 10.5kA and electrode force was 1kN. Welding time was increased from 0.067s up to 0.2s with a rise of 0.033s. Two intermetallic compound layers were generated at weld interfacial zones between aluminum alloys and steel during welding process, and the major phases were FeAl3 adjacent and directing to aluminum alloy and Fe2Al5 adjacent and directing to the steel. Diffusion of Si in aluminum alloy occurred at the interface, whereas the diffusion of Mg and Cu was not observed at the interface according to the EPMA analysis results. Hardness of intermetallic compound layers was 13.8GPa, which was about 12 times as much as that of the aluminum alloy. The largest tensile-shear strength was obtained on the condition of 0.134 and 0.167s welding time.

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Striewe, Barbara, Axel von Hehl, Norbert Grittner, Mirko Schaper, and Florian Nürnberger. "Heat Treatment of Aluminum-Titanium-Compounds Made by Co-Extrusion and Friction Welding." Materials Science Forum 794-796 (June 2014): 839–44. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.839.

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The combination of aluminum and titanium alloys allows for designing lightweight structures with tailor-made properties at the macroscopic global as well as at the microscopic scale. In this context both co-extrusion and friction welding offer a great potential for advanced solutions for products with material combinations of aluminum and titanium. While titanium alloys show particular high mechanical strength and good corrosion resistance, aluminum alloys provide a considerable high specific bending stiffness along with low materials costs. Since the mechanical properties of metallic composites highly depend on the existence and formation of the intermetallic layer in the bonding zone compounds were processed by co-extrusion and friction welding and subsequent heat treatment to investigate the strength and the composition of the bonding zone. The results of friction welded samples concerning the intermetallic layer that was formed during heat treatment were compared with those directly after the co-extrusion. In this layer an enrichment of elements which origin from the aluminum alloy, particularly silicon, was observed. The layer was characterized by optical microscopy, scanning electron microscopy as well as electron probe micro analysis. The mechanical properties were determined by tensile tests.

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Hamritha, S., M. Shilpa, M. R. Shivakumar, G. Madhoo, Y. P. Harshini, and Harshith. "Study of Mechanical and Tribological Behavior of Aluminium Metal Matrix Composite Reinforced with Alumina." Materials Science Forum 1019 (January 2021): 44–50. http://dx.doi.org/10.4028/www.scientific.net/msf.1019.44.

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Aluminium alloy has gained importance in the automotive and aerospace industry as it is easily available and easy in manufacturing. In the recent years, materials science has gained huge importance in the field of composites. In the field of composites metal matrix composite is playing a lead role in industrial applications. The unique combinations of properties provided by aluminum and its alloys make aluminum one of the most versatile, economical and attractive metallic materials. To enhance the properties of aluminum, it has been reinforced with alumina, silicon carbide, graphene and others. In this study, A357 aluminum has been strengthened by using different weight percent of alumina as reinforcement. Percentage of alumina used are 4%, 8% and 12% to enhance the mechanical and tribological property of A357.The fabricated samples were studied to understand the performance of the composite for mechanical and tribological characters. It was observed that the composites showed superior properties compared to the base material. Statistical analysis i.e. regression analysis has been carried out for hardness and tensile strength of alumina reinforced aluminum composite.

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Dudzik, Krzysztof, and Mirosław Czechowski. "Influence of Joining Method for Mechanical Properties of 5083, 5059 and 7020 Aluminum Alloys Joints." Solid State Phenomena 220-221 (January 2015): 583–88. http://dx.doi.org/10.4028/www.scientific.net/ssp.220-221.583.

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The paper presents the research results on the mechanical properties of aluminum alloy 7020 and its FSW and MIG welded joints. For comparison, alloy 5083 – the most currently used in shipbuilding alloy was chosen as well as 5059 – the new high-strength alloy. Besides, the native material alloys there were investigated their joints welded by FSW and MIG – the same methods as alloy 7020. Welding parameters used for the connection of the sheets made of 7020, 5083 and 5059 alloys were presented. Metallographic analysis showed the correct construction of structural bonded joints.Friction Stir Welding (FSW) – a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. FSW method can be an alternative to traditional arc welding methods, especially MIG, which is the most common method of joining aluminum alloys used in shipbuilding. The research was carried out using a static tensile test in accordance with the requirements of the Polish Standards PN-EN ISO 4136:2011 and PN-EN ISO 6892-1:2010. Flat samples cut perpendicular to the direction of rolling were used. The research was conducted at the temperature of +20 oC.Friction stir welded joints of tested alloys have higher strength properties as compared to MIG welded joints. The 7020 alloy has higher strength properties then alloys 5083 and 5059. The yield stress is higher by 14.8% as compared to alloy 5083, and by 11.7% as compared to the alloy 5059. Plastic properties of alloy 7020 are the lowest, but with reserves meet the requirements of classification societies. The joints welded by FSW of alloy 7020 have the highest strength properties of all researched joints – higher then alloys 5083 and 5059 joints welded by FSW and joints of all alloys welded by MIG.

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Wilk, M. S., and R. E. Śliwa. "The Influence of Features of Aluminium Alloys 2024, 6061 and 7075 on the Properties of Glare-Type Composites / Wpływ Właściwości Stopów Aluminium 2024, 6061, 7075 Na Cechy Kompozytu Typu Glare." Archives of Metallurgy and Materials 60, no. 4 (December 1, 2015): 3101–8. http://dx.doi.org/10.1515/amm-2015-0496.

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The above paper presents the assumptions and results of the research whose aim was to determine the influence of 2024, 6061 and 7075 aluminum alloys on the final properties of GLARE-type composites. GLARE 3 2/1 type composites, made of two layers of the epoxy prepreg, reinforced with unidirectional glass fibers, arranged in the direction of 0°/90°, and two sheets of aluminum with a thickness of 0.4 mm, were investigated. Composites of various stacking configurations of alloy layers, made of one type of aluminum alloy (so-called ‘homogeneous composites’), and two different alloys (mixed composites), were analyzed. The properties of the composites were evaluated with the use of the mixing rule and compared with the test results. The influence of the used aluminum alloys on mechanical properties of GLARE-type composites has been determined. GLARE-type composite made of 7075 alloy sheets had the most favorable mechanical properties in comparison to properties of composites with 2024 and 6061 sheets. It has been shown how the properties of GLARE-type composites depend on the type of the aluminum alloy. It has been also proved that the properties of GLARE-type composites can be evaluated with the use of the mixing rule.

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Watari, Hisaki, Yoshimasa Nishio, Mayumi Suzuki, Ryoji Nakamura, Nobuhio Koga, and Keith Davey. "Mechanical Properties and Metallurgical Qualities of High Aluminum Content Magnesium Alloys Fabricated by Twin-Roll Casting." Materials Science Forum 654-656 (June 2010): 1440–43. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1440.

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This paper describes the twin-roll casting technology of magnesium alloys that contain relatively high weight ratios of aluminum, such as AZ91, AZ101 and AZ111. The magnesium alloy sheets were cast by a horizontal twin roll caster to manufacture relatively high-strength Mg alloys with high aluminum content. The influences of such process parameters as casting temperature and roll speed were ascertained. The microstructures of cast magnesium alloy sheets are observed to investigate the effects of roll-casting conditions on crystal growth in the cast products. It was found that Mg alloys with high aluminum content can be fabricated at a roll speed of 15 m/min with a horizontal-roll caster. The grain size of the manufactured wrought magnesium alloy sheet was about 10 micrometers due to rapid solidification in the proposed process.

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Shen, Hua, He Liang, Guang Chun Yao, Wei Dong Yang, and Xiao Dong Ren. "Effect of Cerium-Rich Mischmetal Content on the Mechanical Properties and Fracture Morphology of New 5XXX Series Aluminum Alloys." Applied Mechanics and Materials 152-154 (January 2012): 239–43. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.239.

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Preparation process of new 5XXX series aluminum alloys containing cerium-rich mischmetal wasintroduced .The effects of cerium-rich mischmetal on fracture morphology and mechanical properties of aluminium alloy were investigated in detail by scanning electronic microscope (SEM), and tensile test.The results show that alloys tensile strength and elongation with the increase of the content of mischmetal first increased, then down. When the mischmetal content is increased up to 0.30%, the tensile strength and elongation are 115 MPa and 25.9% respectively, meanwhile, the fractograph exhibited typical ductile dimple fracture pattern. Then the alloy performance is best. Mischmetal added into the alloy can improve the mechanical properties of materials, but too much mischmetal will induce the decrease in the material performance.Becase it may generate more the coarse Al11(Ce ,La)3particle.

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Vanko, Branislav, Ladislav Stanček, Michal Čeretka, Eduard Sedláček, and Roman Moravčík. "Properties of EN AW-2024 Wrought Aluminum Alloy after Casting with Crystallization under Pressure." Scientific Proceedings Faculty of Mechanical Engineering 23, no. 1 (December 1, 2015): 58–65. http://dx.doi.org/10.1515/stu-2015-0009.

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Abstract Establishing of wrought aluminum alloys casting to manufacture is now a global trend, for example due to lower production costs compare to forging or due to the ability to produce parts with thinner sections and more complex shapes. The aim of using these alloys in the foundry industry is in particular the creation of castings with higher mechanical properties than achieve castings made of standard casting aluminum alloys. Most often are cast wrought aluminum alloys of the 2xxx, 6xxx and 7xxx series. In the experiment, an alloy EN AW-2024 has been cast by modified technology of casting with crystallization under pressure. They were measured basic mechanical properties of the castings in the as-cast state and after heat treatment.

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Zhukov, Kozulin, Khrustalyov, Kahidze, Khmeleva, Moskvichev, Lychagin, and Vorozhtsov. "Pure Aluminum Structure and Mechanical Properties Modified by Al2O3 Nanoparticles and Ultrasonic Treatment." Metals 9, no. 11 (November 7, 2019): 1199. http://dx.doi.org/10.3390/met9111199.

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This paper examines dispersion hardened alloys based on commercial-purity aluminum obtained by permanent mold casting with the addition of aluminum oxide nanoparticles. Ultrasonic treatment provides a synthesis of non-porous materials and a homogeneous distribution of strengthening particles in the bulk material, thereby increasing the mechanical properties of pure aluminum. It is shown that the increase in the alloy hardness, yield stress, ultimate tensile strength, and lower plasticity depend on the average grain size and a greater amount of nanoparticles in the alloy.

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Khrustalyov, Anton P., Alexander A. Kozulin, Ilya A. Zhukov, Marina G. Khmeleva, Alexander B. Vorozhtsov, Dmitry Eskin, Suwaree Chankitmunkong, Vladimir V. Platov, and Sergey V. Vasilyev. "Influence of Titanium Diboride Particle Size on Structure and Mechanical Properties of an Al-Mg Alloy." Metals 9, no. 10 (September 23, 2019): 1030. http://dx.doi.org/10.3390/met9101030.

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In the present study, aluminum alloys of the Al-Mg system with titanium diboride particles of different size distribution were obtained. The introduction of particles in the alloy was carried out using master alloys obtained through self-propagating high-temperature synthesis (SHS) process. The master alloys consisted of the intermetallic matrix Al-Ti with distributed TiB2 particles. The master alloys with TiB2 particles of different size distribution were introduced in the melt with simultaneous ultrasonic treatment, which allowed the grain refining of the aluminum alloy during subsequent solidification. It was found that the introduction of micro- and nanoparticles TiB2 increased the yield strength, tensile strength, and plasticity of as-cast aluminum alloys. After pass rolling the castings and subsequent annealing, the effect of the presence of particles on the increase of strength properties is much less felt, as compared with the initial alloy. The recrystallization of the structure after pass rolling and annealing was the major contributor to hardening that minimized the effect of dispersion hardening due to the low content of nanosized titanium diboride.

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Guo, Hong Min, and Xiang Jie Yang. "Rheoforging of Wrought Aluminum Alloys." Solid State Phenomena 141-143 (July 2008): 271–76. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.271.

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Wrought aluminum alloys have wide variety applications in aerospace and automobile industries, due to their superior properties compared to casting aluminum alloys. Rheoforging is a modification of thixoforging, which starts directly from the liquid phase instead of reheating of a billet. In the present process, suitable semi-solid slurries of wrought aluminum alloys are prepared by the LSPSF (low superheat pouring with a shear field) rheocasting process within 25s. The effects of processing conditions on the degree of spherical grain refinement in 2024, 6082 and 7075 alloys are discussed. 2024 and 7075 alloys have been used in order to investigate rheoformability of high performance aluminum alloy. Experimental results show that rheoforging based on LSPSF process can produce relatively homogeneous microstructure throughout the cup-shaped component. However, high solid fraction of semi-solid slurry promotes metal flow and results in solid/liquid segregation. Subsequent optimized heat treatments raise significantly the mechanical properties. Future potentials and challenges to be solved are discussed.

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Kuchariková, Lenka, Tatiana Liptáková, Eva Tillová, Daniel Kajánek, and Eva Schmidová. "Role of Chemical Composition in Corrosion of Aluminum Alloys." Metals 8, no. 8 (July 26, 2018): 581. http://dx.doi.org/10.3390/met8080581.

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Aluminum alloys are the most important part of all shaped castings manufactured, especially in the aerospace and automotive industries. This work focuses on the corrosion properties of the heat-hardening aluminum alloys commonly used for production of automotive castings AlSi7Mg0.3 and on self-hardening AlZn10Si8Mg. Iron is a common impurity in aluminum cast alloy and its content increases by using secondary aluminum alloys. Therefore, experimental materials were developed, with chemical composition according to standards (primary alloys) and in states with an increasing content of Fe. The experimental aluminum alloys are briefly discussed in terms of their chemical composition, microstructure, mechanical properties and corrosion behavior. Corrosion properties were examined using three types of corrosion tests: exposure test, potentiodynamic tests, and Audi tests. Corrosion characteristics of materials were evaluated using stereo, optical and scanning electron microscopy, energy dispersive X-ray analysis, too. Correlation of pit initiation sites with microstructural features revealed the critical role of iron-rich phases, silicon particles and corresponding alloy matrix.

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Guo, Hong Min, Xiang Jie Yang, and J. X. Wang. "Microstructure and Mechanical Properties of Al Alloys by Semi-Solid Processing with LSPSF Technology." Materials Science Forum 628-629 (August 2009): 477–82. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.477.

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Rheoforming is becoming the choice of the casting industry which relies on the semi-solid slurry for high integrity structural parts. The potential of rheoforming with LSPSF (Low superheat pouring with a shear field) for aluminum alloys was investigated in the present work. High quality semi-solid slurries of a series of aluminum alloys were manufactured by LSPSF process, such as casting alloy A356, high strength alloy 201, secondary die casting alloy A380 and wrought alloy 2024, 6082 and 7075, in which the primary α-Al presented spherical, small and homogeneous distribution, especially with zero-entrapped liquid. Applications of LSPSF in high pressure die casting process and squeeze casting process were presented. Results showed that LSPSF rheoforming could improve microstructures and increase mechanical properties.

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Journal articles on the topic 'Aluminum alloys – Mechanical properties'

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