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Journal articles on the topic "Al-12Si"

1

Basavakumar, K. G., P. G. Mukunda, and M. Chakraborty. "Dry sliding wear behaviour of Al–12Si and Al–12Si–3Cu cast alloys." Materials & Design 30, no. 4 (April 2009): 1258–67. http://dx.doi.org/10.1016/j.matdes.2008.07.003.

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Zhao, Zhong Kui, Zhen Qiao, Chang Long Li, Qing Zhou Sun, Pu Qing Zhang, and Gui Qing Wang. "Effect of Li on Al-Si Alloys Structure and Properties." Advanced Materials Research 79-82 (August 2009): 119–22. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.119.

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Al-12Si alloys containing1%, 2% and 3% lithium were prepared. The alloys were melted by a vacuum induction furnace. The microstructure was observed by optical microscopy, tensile test was performed at a rate of 1mm•s-1. Hardness was determined by a Vicker’s hardness machine. Adding 1%Li to the of Al-12Si alloy, the alloy is modified and its structure is eutectic. When Li content is 2% or 3%, the structure is hyper-eutectic, and proeutectic Si-phases are present. The Al-12Si-1Li alloy has a tensile strength of 190MPa and an elongation of 1%. With the increment of lithium, the strength and elongation of Al-12Si containing Li alloys gradually decreases, because of the presence of proeutectic Si-phases. The alloys exhibits hardening behaviors when ageing at 200°C, and the hardness decreases to a value with the prolongation of the ageing time.
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Gao, Pei Hu, Jian Ping Li, Zhong Yang, Yong Chun Guo, and Yan Rong Wang. "Corrosion Resistance of Al-12Si Coatings on AZ91 Magnesium Alloy Prepared through Flame Spray." Materials Science Forum 765 (July 2013): 639–43. http://dx.doi.org/10.4028/www.scientific.net/msf.765.639.

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In this study, Al-12Si alloy coatings with different thickness were prepared through flame spray on the surface of the AZ91 magnesium alloy to improve its corrosion resistance. The corrosion resistance was characterized through corrosion potential using electrochemical methods. The Al-12Si alloy coatings were heat treated at 100 °C, 200 °C and 300 °C for 6, 12, 18 and 24 hours. The effects of heat treatment temperature and time on the coatings’ corrosion resistance were discussed. It was found that there were no phase changes during the deposition of Al-12Si coatings through flame spray and heat treatment. The greater the coating thickness was, the higher the corrosion potential was. After annealing, the inner microstructure of the Al-12Si coating was densified furtherly and the annealed coatings had higher corrosion potential and better corrosion resistance. The coating annealed at 100 °C for 18 hours had the highest corrosion potential and the best corrosion resistance in the same coating thickness.
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Dai, Shihan, Zeyu Bian, Mingliang Wang, Yi Wu, Dong Chen, Hongping Li, and Haowei Wang. "The High-Temperature Creep Behavior of In-Situ TiB2 Particulate Reinforced Al12Si4Cu2NiMg Composite." Metals 8, no. 11 (November 7, 2018): 917. http://dx.doi.org/10.3390/met8110917.

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In the present work, the in-situ TiB2/Al12Si4Cu2NiMg (denoted as ‘Al-12Si’) composites were successful synthesized through the salt-metal reaction route. The influences of weight fraction (0, 4, and 9 wt.%) and heat treatment (T5 and T7) on the tensile creep deformation were studied at ≥623 K under constant load in air. At the investigated temperature and stress condition, TiB2 particles increased creep deformation resistance, as compared to the unreinforced alloy, while the composites presented similar strength when the weight fraction of reinforcement increased from 4% to 9%. It was found that the steady-state creep rate was lower in the 4 wt.% TiB2/Al-12Si composite (T5), as compared with that in the 4 wt.% TiB2/Al-12Si composite (T7). The result has been rationalized by using the load-partitioning model and relative to the evolution of the rigid phase. The creep deformation of the 4 wt.% TiB2/Al-12Si composite was controlled by the climb of dislocations in the aluminum alloy matrix.
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Zhou, Ling Zhan, Yin Jiang Peng, Xiu Rong Zhu, Guang Ming Zhang, Li Ming Yang, and Hong Xia Shi. "Influence of Ti to the Microstructure and Mechanical Properties of Al-12Si-3.2Cu-1Mg-2.4Ni Piston Alloy." Applied Mechanics and Materials 477-478 (December 2013): 1278–83. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.1278.

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Al-12Si-3.2Cu-1Mg-2.4Ni-χTi (χ=0, 0.2) alloys were prepared by squeeze casting process, and then heat-treated. The mechanical properties were tested at 350°C, the microstructure and phases in them were investigated by optical microscope, SEM, EDS and XRD. It is found that the grain size has an obvious increment after 0.2 wt. % Ti additions to Al-12Si-3.2Cu-1Mg-2.4Ni, and the ultimate tensile strength at elevated-temperature increased accordingly. Intermetallic compounds, such as γ-Al7Cu4Ni, M-Mg2Si, Q-Al5Cu2Mg8Si6 and δ-Al3CuNi existing in alloys with and without Ti addition. Needle-like Ti containing phase with the elements of Al, Si and Ti created in Al-12Si-3.2Cu-1Mg-2.4Ni-0.2Ti alloy, and the eutectic Si is found to distribute by the side of Ti containing phase.
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Zhang, Shikai, Pan Ma, Yandong Jia, Zhishui Yu, Rathinavelu Sokkalingam, Xuerong Shi, Pengcheng Ji, Juergen Eckert, and Konda Gokuldoss Prashanth. "Microstructure and Mechanical Properties of Al–(12-20)Si Bi-Material Fabricated by Selective Laser Melting." Materials 12, no. 13 (July 2, 2019): 2126. http://dx.doi.org/10.3390/ma12132126.

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In this study, a combination of Al–12Si and Al–20Si (Al–(12-20)Si) alloys was fabricated by selective laser melting (SLM) as a result of increased component requirements such as geometrical complexity and high dimensional accuracy. The microstructure and mechanical properties of the SLM Al–(12-20)Si in as-produced as well as in heat-treated conditions were investigated. The Al–(12-20)Si interface was in the as-built condition and it gradually became blurry until it disappeared after heat treatment at 673 K for 6 h. This Al–(12-20)Si bi-material displayed excellent mechanical properties. The hardness of the Al–20Si alloy side was significantly higher than that of the Al–12Si alloy side and the disparity between both sides gradually decreased and tended to be consistent after heat treatment at 673 K for 6 h. The tensile strength and elongation of the Al–(12-20Si) bi-material lies in between the Al–12Si and Al–20Si alloys and fracture occurs in the Al–20Si side. The present results provide new insights into the fabrication of bi-materials using SLM.
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Wu, Mei Ling, Feng Wei Guo, Ming Li, and Ya Fang Han. "Effect of Trace Strontium Addition on Microstructure and Room Temperature Fracture Toughness of Nb-12Si-22Ti Alloys." Materials Science Forum 849 (March 2016): 603–8. http://dx.doi.org/10.4028/www.scientific.net/msf.849.603.

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The effect of strontium (Sr) addition (0.2 at.%) on the microstructure and mechanical properties of Nb-12Si-22Ti alloys were studied. Microstructure of the alloys was observed by scanning electron microscope, and their phase compositions were analyzed with X-ray diffraction and Electro-Probe Microanalyzer. The room temperature fracture toughness was measured. The results indicated that the phases of Nbss and Nb3Si were presented in Nb-12Si-22Ti alloys. However, with the Al and Sr addition, the alloys were composed of Nbss and β-Nb5Si3. Compared with the Nb-12Si-22Ti alloys, the value of room temperature fracture toughness increased about 46% and 73% with the addition of Al and Sr alloy, respectively. The relationship between the microstructure and the mechanical properties was discussed.
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Yang, Zi An, Zhi Lei Xiang, Zi Yong Chen, Wei Min Ren, Zhong Hao Li, and Chao Tan. "Research on Microstructure and Properties of TiB2/Al-Si Multi-Element Piston Alloy Composite." Materials Science Forum 1035 (June 22, 2021): 892–99. http://dx.doi.org/10.4028/www.scientific.net/msf.1035.892.

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The Al-12Si-4Cu-2Ni-0.9Mg was used as the matrix, TiB2/Al-12Si-4Cu-2Ni-0.9Mg composite material was prepared by adding Al-TiB2 in master alloy, and the mass fraction of TiB2 particles in the composite material was 3%. TiB2 particles were prepared by melt self-propagating direct synthesis method. Based on studying the influence of mechanical stirring speed on the distribution of TiB2 particles during the preparation of Al-TiB2 master alloy, the optimal mechanical stirring speed was optimized to 800 r/min. TiB2/Al-12Si-4Cu-2Ni-0.9Mg composite material was prepared by remelting and dilution method. The as-cast solidified structure of the composite material was mainly composed of α-Al matrix, Si phase and TiB2 particles, and TiB2 particles were evenly distributed. Under the condition of 360 °C(Working temperature of common piston), the tensile strength of the composite material was 15.4% higher than that of the base material, and the yield strength of the composite material was 29.4% higher than that of the base material.
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Rusin, N. M., and A. L. Skorentsev. "Features of plastic flow of sintered Al-12Si-xSn alloys." Physics and Chemistry of Materials Treatment, no. 6 (2018): 48–59. http://dx.doi.org/10.30791/0015-3214-2018-6-48-59.

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Chen, Guozheng, Weizheng Zhang, and Tateoki Iizuka. "The fatigue fracture characteristics of the bond zone of aluminum matrix composites (Al-12Si/ABOw) with Al-12Si alloys." Materials Science and Engineering: A 755 (May 2019): 181–89. http://dx.doi.org/10.1016/j.msea.2019.04.017.

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Dissertations / Theses on the topic "Al-12Si"

1

Prashanth, Konda Gokuldoss. "Selective laser melting of Al-12Si." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-144245.

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Selective laser melting (SLM) is a powder-based additive manufacturing technique consisting of the exact reproduction of a three dimensional computer model (generally a computer-aided design CAD file or a computer tomography CT scan) through an additive layer-by-layer strategy. Because of the high degree of freedom offered by the additive manufacturing, parts having almost any possible geometry can be produced by SLM. More specifically, with this process it is possible to build parts with extremely complex shapes and geometries that would otherwise be difficult or impossible to produce using conventional subtractive manufacturing processes. Another major advantage of SLM compared to conventional techniques is the fast cooling rate during the process. This permits the production of bulk materials with very fine microstructures and improved mechanical properties or even bulk metallic glasses. In addition, this technology gives the opportunity to produce ready-to-use parts with minimized need for post-processing (only surface polishing might be required). Recently, significant research activity has been focused on SLM processing of different metallic materials, including steels, Ti-, Ni- and Al-based alloys. However, most of the research is devoted to the parameters optimization or to feasibility studies on the production of complex structures with no detailed investigations of the structure-property correlation. Accordingly, this thesis focuses on the production and structure-property correlation of Al-12Si samples produced by SLM from gas atomized powders. The microstructure of the as-prepared SLM samples consists of supersaturated primary Al with an extremely fine cellular structure along with the residual free Si situated at the cellular boundaries. This microstructure leads to a remarkable mechanical behavior: the yield and tensile strengths of the SLM samples are respectively four and two times higher than their cast counterparts. However, the ductility is significantly reduced compared with the cast samples. The effect of annealing at different temperatures on the microstructure and resulting mechanical properties of the SLM parts has been systematically studied by analyzing the size, morphology and distribution of the phases. In addition, the mechanical properties of the SLM samples have been modeled using micro- structural features, such as the crystallite and matrix ligament sizes. The results demonstrate that the mechanical behavior of the Al-12Si SLM samples can be tuned within a wide range of strength and ductility through the use of the proper annealing treatment. The Al-Si alloys are generally used as pistons or cylinder liners in automotive applications. This requires good wear resistance and sufficient strength at the operating temperature, which ranges between 373 – 473 K. Accordingly, the tensile properties of the SLM samples were also tested at these temperatures. Changing the hatch style during SLM processing vary the texture in the material. Hence, samples with different hatch styles were produced and the effect of texture on their mechanical behavior was evaluated. The results show that the hatch style strongly influences both the mechanical properties and the texture of the samples; however no direct correlation was observed between texture and mechanical properties. The wear properties of the Al-12Si material was evaluated using pin-on-disc and fretting wear experiments. These experiments show that the as-prepared SLM samples exhibit better wear resistance than their cast counterparts and the SLM heat-treated samples. Finally, the corrosion investigations reveal that the SLM samples have similar corrosion behavior as the cast specimens under acidic conditions. A major drawback for the wide application of SLM as an industrial processing route is the limited size of the products. This is a direct consequence of the limited dimensions of the available building chambers, which allow for the production of samples with volumes of about 0.02 m3. A possible way to overcome this problem would be the use of the welding processes to join the small SLM objects to form parts with no dimensional limitations. In order to verify this possibility, friction welding was employed to join Al-12Si SLM parts. The results indicate that friction welding not only successfully permits the join materials manufactured by SLM, but also helps to significantly improve their ductility. This work clearly demonstrates that SLM can be successfully used for the production of Al-12Si parts with an overall superior performance of the mechanical and physical properties with respect to the conventional cast samples. Moreover, the mechanical properties of the SLM samples can be widely tuned in-situ by employing suitable hatch styles or ex-situ by the proper heat treatment. This might help the development of SLM for the production of innovative high-performance Al-based materials and structures with controlled properties for automotive and aerospace applications.
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Prashanth, K. G., B. Debalina, Z. Wang, P. F. Gostin, A. Gebert, M. Calin, U. Kühn, M. Kamara, S. Scudino, and J. Eckert. "Tribological and corrosion properties of Al–12Si produced by selective laser melting." Cambridge University Press, 2014. https://tud.qucosa.de/id/qucosa%3A39056.

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The effect of annealing on the tribological and corrosion properties of Al–12Si samples produced by selective laser melting (SLM) is evaluated via sliding and fretting wear tests and weight loss experiments and compared to the corresponding material processed by conventional casting. Sliding wear shows that the as-prepared SLM material has the least wear rate compared to the cast and heat-treated SLM samples with abrasive wear as the major wear mechanism along with oxidation. Similar trend has also been observed for the fretting wear experiments, where the as-prepared SLM sample displays the minimum wear loss. On the other hand, the acidic corrosion behavior of the as-prepared SLM material as well as of the cast samples is similar and the corrosion rate is accelerated by increasing the heat treatment temperature. This behavior is due to the microstructural changes induced by the heat treatment, where the continuous network of Si characterizing the as-prepared SLM sample transforms to isolated Si particles in the heat-treated SLM specimens. This shows that both the wear and corrosion behaviors are strongly associated with the change in microstructure of the SLM samples due to the heat-treatment process, where the size of the hard Si particles increases, and their density decreases with increasing annealing temperature.
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Prashanth, Konda Gokuldoss [Verfasser], Jürgen [Akademischer Betreuer] Eckert, and Nilay K. [Akademischer Betreuer] Mukhopadhyay. "Selective laser melting of Al-12Si / Konda Gokuldoss Prashanth. Gutachter: Jürgen Eckert ; Nilay K. Mukhopadhyay." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://d-nb.info/106844696X/34.

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4

Prashanth, Konda Gokuldoss. "Selective laser melting of Al-12Si." Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A28107.

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Selective laser melting (SLM) is a powder-based additive manufacturing technique consisting of the exact reproduction of a three dimensional computer model (generally a computer-aided design CAD file or a computer tomography CT scan) through an additive layer-by-layer strategy. Because of the high degree of freedom offered by the additive manufacturing, parts having almost any possible geometry can be produced by SLM. More specifically, with this process it is possible to build parts with extremely complex shapes and geometries that would otherwise be difficult or impossible to produce using conventional subtractive manufacturing processes. Another major advantage of SLM compared to conventional techniques is the fast cooling rate during the process. This permits the production of bulk materials with very fine microstructures and improved mechanical properties or even bulk metallic glasses. In addition, this technology gives the opportunity to produce ready-to-use parts with minimized need for post-processing (only surface polishing might be required). Recently, significant research activity has been focused on SLM processing of different metallic materials, including steels, Ti-, Ni- and Al-based alloys. However, most of the research is devoted to the parameters optimization or to feasibility studies on the production of complex structures with no detailed investigations of the structure-property correlation. Accordingly, this thesis focuses on the production and structure-property correlation of Al-12Si samples produced by SLM from gas atomized powders. The microstructure of the as-prepared SLM samples consists of supersaturated primary Al with an extremely fine cellular structure along with the residual free Si situated at the cellular boundaries. This microstructure leads to a remarkable mechanical behavior: the yield and tensile strengths of the SLM samples are respectively four and two times higher than their cast counterparts. However, the ductility is significantly reduced compared with the cast samples. The effect of annealing at different temperatures on the microstructure and resulting mechanical properties of the SLM parts has been systematically studied by analyzing the size, morphology and distribution of the phases. In addition, the mechanical properties of the SLM samples have been modeled using micro- structural features, such as the crystallite and matrix ligament sizes. The results demonstrate that the mechanical behavior of the Al-12Si SLM samples can be tuned within a wide range of strength and ductility through the use of the proper annealing treatment. The Al-Si alloys are generally used as pistons or cylinder liners in automotive applications. This requires good wear resistance and sufficient strength at the operating temperature, which ranges between 373 – 473 K. Accordingly, the tensile properties of the SLM samples were also tested at these temperatures. Changing the hatch style during SLM processing vary the texture in the material. Hence, samples with different hatch styles were produced and the effect of texture on their mechanical behavior was evaluated. The results show that the hatch style strongly influences both the mechanical properties and the texture of the samples; however no direct correlation was observed between texture and mechanical properties. The wear properties of the Al-12Si material was evaluated using pin-on-disc and fretting wear experiments. These experiments show that the as-prepared SLM samples exhibit better wear resistance than their cast counterparts and the SLM heat-treated samples. Finally, the corrosion investigations reveal that the SLM samples have similar corrosion behavior as the cast specimens under acidic conditions. A major drawback for the wide application of SLM as an industrial processing route is the limited size of the products. This is a direct consequence of the limited dimensions of the available building chambers, which allow for the production of samples with volumes of about 0.02 m3. A possible way to overcome this problem would be the use of the welding processes to join the small SLM objects to form parts with no dimensional limitations. In order to verify this possibility, friction welding was employed to join Al-12Si SLM parts. The results indicate that friction welding not only successfully permits the join materials manufactured by SLM, but also helps to significantly improve their ductility. This work clearly demonstrates that SLM can be successfully used for the production of Al-12Si parts with an overall superior performance of the mechanical and physical properties with respect to the conventional cast samples. Moreover, the mechanical properties of the SLM samples can be widely tuned in-situ by employing suitable hatch styles or ex-situ by the proper heat treatment. This might help the development of SLM for the production of innovative high-performance Al-based materials and structures with controlled properties for automotive and aerospace applications.
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5

Lopes, Miguel. "Estudo do comportamento ao desgaste de compósitos de Al-12Si/NbC desenvolvidos por deposição assistida por laser." Master's thesis, 2017. http://hdl.handle.net/10400.26/21227.

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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Engenharia de Produção
Os revestimentos compósitos Al-12Si/NbC foram produzidos por deposição assistida por laser em um substrato de liga Al-7Si. A microestrutura e a resistência ao desgaste dos revestimentos foram avaliadas em comparação com as propriedades do substrato e da liga da matriz. A resistência ao desgaste foi avaliada usando testes de deslizamento reciproco de configuração esfera sobre o plano, em que foram usados como contra-corpos esferas do aço crómio AISI 52100, aço inox 316L, carboneto de tungsténio (WC) e óxido de alumínio (Al2O3). A microestrutura dos revestimentos é constituída por partículas de NbC dispersas numa matriz de liga Al-12Si. A matriz é constituída por dendrites primárias de α-Al e mistura eutéctica α-Al/Si. O reforço com partículas de NbC induz um aumento considerável na dureza média do material da matriz de (85 ± 1) HV a (152 ± 40) HV e na respetiva resistência ao desgaste. Os mecanismos de desgaste envolvem oxidação, adesão com deformação plástica e delaminação e dependem do contra-corpo utlizado.
Al-12Si/NbC composite coatings were produced by laser-assisted deposition on a substrate of Al-7Si alloy. The microstructure and wear resistance of the coatings were evaluated in comparison to the properties of the substrate and the matrix alloy. The wear resistance was evaluated using reciprocating sliding tests in a configuration of sphere over-a-plan and as counter-body spheres of AISI 52100 chromium steel, AISI 316L stainless steel, tungsten carbide (WC) and alumina (Al2O3). The coatings microstructure consists of NbC particles dispersed in an Al-12Si alloy matrix. The matrix consists of primary dendrites of α-Al and α-Al/Si eutectic mixture. The reinforcement with NbC particles induces a considerable increase in the average hardness of the matrix material from (85 ± 1) HV to (152 ± 40) HV and in the respective wear resistance. The wear mechanisms involve oxidation, adhesion with plastic deformation and delamination and depend of the counter-body used.
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Guo, Yong-Zong, and 郭勇宗. "The Effect of Hot Pressing, Foaming Conditions, and TiH2 Contents on the Foaming Characterization of Al-12Si Alloy." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/76422905710464421280.

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碩士
義守大學
材料科學與工程學系碩士班
96
The experiment will change hot pressing conditions of foamable precursor. To understand the hot pressing conditions with relative density of foamable precursor. Otherwise, melting foamable precursor to foam to discuss foam properties. To get better hot pressing conditions and make mechanical test. To discuss relationship between hot pressing conditions, foam properties and compressibility. The results shows that TiH2 contents is 0.6wt%, the relative density of foamable precursor between 94.8~96.6%. The foam phenomenon is not obviously. The relative density of foamable precursor between 97.6~98.0%. The foam phenomenon is obviously but foam properties not good. TiH2 content is 0.6wt%, the hot pressing pressure increase with the uniform cell. TiH2 contents are 0.8wt% and 1.0wt%. The cell is not uniform. The cell is uniform, the compressibility is better. From the compressibility results, hot pressing conditions and TiH2 contents are not affect the compressibility. But hot pressing conditions and TiH2 contents are affect the foam properties. The stress-strain curve will be affected by cell shape and the foam expansion.
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Chiu, Chieh-Ying, and 邱界瑛. "The Influence of Hot Pressing Times on the Foaming and Mechanical Properties of the Al-12Si Alloy Foam." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59562253290188701514.

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碩士
義守大學
材料科學與工程學系碩士班
98
In this study, Al-12Si alloy repeatedly pressing, hot pressing to change the material conditions of pre-expansion, to understand the impact of the expansion ratio. Through the foaming, the foam material of the hot pressing of pre-foam, the foam parameters and the relationship between magnification. And compression testing, and evaluating different hot pressing conditions, the foaming properties and the nature of the relationship between compression. After several hot pressing, when the pressing temperature and pressing pressure increases, the expansion ratio will increase. But with the increase in the times of hot pressing, the expansion ratio will graduall decline. Part of the nature of the foam, with the foaming time increased, the foam from the holes in the shape of circular holes into the holes in the polygon, while the internal collapse of the behavior will occur. Compressed nature of the part of the lower foam expansion ratio greater stress should be reduced, but the stress of a short flat area; the expansion ratio and a large foam and vice versa. Compression is mainly by the pore shape and size of the expansion ratio.
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Sundararajan, S. "Study Of The Properties And Particle/Matrix Interface In Al-12 Si-10% SiCp Composite." Thesis, 1999. http://etd.iisc.ernet.in/handle/2005/1525.

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Suryawanshi, Jyoti Balaji. "Mechanical and Corrosion Properties of Selective Laser Melted Alloys." Thesis, 2017. http://etd.iisc.ernet.in/2005/3604.

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Selective laser melting (SLM) of metallic powders is an additive manufacturing technique that is widely employed to produce 3D components, and is fast becoming an important method for manufacturing near-net shape and complex metallic parts. In this thesis, a comprehensive investigation on the effect of SLM on the mechanical and corrosion properties of the Al-12Si (AS), 316L stainless steel (SS), and 18(Ni)-300 grade managing steel (MS) is investigated, with particular emphasis on the developing (micro- as well as mesa-)structure -property correlations. Detailed microstructural characterization combined with quasi-static tensile, fracture toughness, fatigue crack growth, and unmatched fatigue tests were conducted. The effect of post-SLM heat treatment as well as the scanning strategy (linear vs. checker board hatch style) was examined and the results are compared with those of conventionally manufactured (CM) counterparts. The SLM alloys exhibit a mesostructured, in addition to the fine cellular structure along the boundaries. In a case of SLM-AS, the fine cellular structure imparts higher strength at the cost of ductility, while the mesostructured, which arises due to the laser track hatching, causes the crack path to be tortuous, and in turn leads to substantial increase in fracture toughness. This imparts significant anisotropy to the toughness while tensile properties are nearly-isotropic. The experimental results of SLM-SS also show that higher tensile strengths properties with a marked reduction ductility. In spite of these, the fracture toughness, which ranges between 63 and 87 MPa.m0.5, of the SLM-SS is good, which is a result of the mesostructured induced crack tortuousity.Both tensile and toughness properties of SLM-SS were found to be anisotropic in nature. Upon aging SLM-MS, nanoscale precipitation of intermetallic compounds occurs within the cells that, in turn, lead in marked improvements in tensile strengths properties, but substantial reductions in ductility and fracture toughness. Overall, the mechanical performance, except ductility, of the SLM-MS after aging is found to be similar to that of CM-MS. Importantly, the lack of ductility does not lead to a reduction in toughness. Although the SLM-MS alloy possesses a mesostructured, no significant anisotropy in the mechanical behaviour is observed. The unnoticed studies on SLM-AS, -SS, and -MS reveal that the tensile residual stresses, gas-pores, and unmelted powder particles, can degrade the unmatched highest fatigue properties considerably and hence need be eliminated for high fatigue strength. Room temperature, electrochemical corrosion resistances (CRs) of SLM-AS, -SS and -MS in 0.1M NaCl solution were also evaluated and compared with those CM counterparts. While SLM improves CRs of AS and SS, it degrades that of MS. The results are discussed in terms of microstructural refinement and porosity that are common in SLM alloys.
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Book chapters on the topic "Al-12Si"

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Zhang, Q., Zi Yang Xiu, Mei Hui Song, and Gao Hui Wu. "Microstructure and Properties of a 70vol.% SiCp/Al-12Si Composite for Electronic Packaging." In Materials Science Forum, 881–84. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-960-1.881.

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Yigezu, Belete Sirahbizu, M. M. Mahapatra, and P. K. Jha. "Mechanical Property and Abrasive Wear Characteristics of In-Situ Synthesized Al+12Si/10TiC Composites." In TMS2013 Supplemental Proceedings, 1053–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118663547.ch129.

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Rodríguez-Guerrero, Alejandro, J. Narciso, Enrique Louis, and F. Rodríguez-Reinoso. "Reducing Threshold Pressure for Infiltration of Al-12Si Alloys into Carbon Particle Compacts by Placing a Thin Layer of Sn at the Infiltration Front." In THERMEC 2006, 785–90. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.785.

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Conference papers on the topic "Al-12Si"

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Durandet, Y., R. Deam, P. Bendeich, M. Ripley, M. Brandt, Qianchu Liu, and P. Baburamani. "Residual stresses in Al7075 alloy plate laser clad with Al-12Si alloy powder." In PICALO 2006: 2nd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2006. http://dx.doi.org/10.2351/1.5056910.

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Rusin, N. M., A. L. Skorentsev, and E. A. Kolubaev. "Effect of hot densification on tribotechnical properties of sintered (Al-12Si)-40Sn alloy." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2017 (AMHS’17). Author(s), 2017. http://dx.doi.org/10.1063/1.5013863.

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Rusin, N. M., and A. L. Skorentsev. "Stages of plastic flow of sintered (Al–12Si)–xSn composites under the compression test." In PROCEEDINGS OF THE ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. Author(s), 2018. http://dx.doi.org/10.1063/1.5083502.

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Durandet, Yvonne, Peter Kallage, and Milan Brandt. "Control of dilution during laser cladding of Al7075 substrates with Al-12Si aluminium alloy powder." In PICALO 2004: 1st Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication. Laser Institute of America, 2004. http://dx.doi.org/10.2351/1.5056109.

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