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Study on the Selective Laser Melting of AlSi10Mg |
Wenqi ZHANG, Haihong ZHU(), Zhiheng HU, Xiaoyan ZENG |
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China |
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Cite this article:
Wenqi ZHANG, Haihong ZHU, Zhiheng HU, Xiaoyan ZENG. Study on the Selective Laser Melting of AlSi10Mg. Acta Metall Sin, 2017, 53(8): 918-926.
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Abstract The growing interest for a wide range of usable Al alloy parts with complex shape in industrial field makes selective laser melting (SLM) stand out as a new technology for rapid prototyping manufacturing. The objective of this work is to investigate AlSi10Mg cast aluminum alloy manufacturing by SLM. The investigation involved the influence of process parameters on the relative density and the influence of heat treatment on the microstructure and mechanical properties. High density and performance were achieved. The results show that the tensile strength of the SLMed AlSi10Mg is much higher than that of press wrought AlSi10Mg, but the elongation is as almost same as that of the press wrought AlSi10Mg. The heat treatment has a significant effect on the mechanical properties and microstructure of SLMed AlSi10Mg parts. The mechanical properties changes with the annealing temperature. Compared with the mechanical properties without annealing process, the tensile strength decreases from 507~518 MPa to 378~406 MPa and the elongation increases from 3.0%~3.5% to 6.5%~9.0% when the annealing temperature is 300 ℃ and the soap time is 2 h because of the changes in the morphology and distribution of the Si.
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Received: 24 October 2016
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Fund: Supported by National Natural Science Foundation of China (No.61475056), Fundamental Research Funds for the Central Universities (No.2016XYZD00), Natural Science Foundation of Hubei Province (No.2014CFA049) and Director Fund of Wuhan National Laboratory for Optoelectronics |
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