Yao-xiang Geng, Hao Tang, Jun-hua Xu, Yu Hou, Yu-xin Wang, Zhen He, Zhi-jie Zhang, Hong-bo Ju, and Li-hua Yu, Influence of process parameters and aging treatment on the microstructure and mechanical properties of AlSi8Mg3 alloy fabricated by selective laser melting, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2287-1
Cite this article as:
Yao-xiang Geng, Hao Tang, Jun-hua Xu, Yu Hou, Yu-xin Wang, Zhen He, Zhi-jie Zhang, Hong-bo Ju, and Li-hua Yu, Influence of process parameters and aging treatment on the microstructure and mechanical properties of AlSi8Mg3 alloy fabricated by selective laser melting, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2287-1
Research Article

Influence of process parameters and aging treatment on the microstructure and mechanical properties of AlSi8Mg3 alloy fabricated by selective laser melting

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  • Received: 13 February 2021Revised: 29 March 2021Accepted: 30 March 2021Available online: 31 March 2021
  • Many studies have investigated the selective laser melting (SLM) of AlSi10Mg and AlSi7Mg alloys, but there is still a lack of researches focused on Al-Si-Mg alloys specifically tailored for SLM. In this work, a novel high Mg-content AlSi8Mg3 alloy was specifically designed for SLM. The results showed that this new alloy exhibited excellent SLM processability with the lowest porosity of 0.07%. Massive lattice distortion led to a high Vickers hardness in samples fabricated at a high laser scanning speed due to the precipitation of Mg2Si nanoparticles from the α-Al matrix induced by high-intensity intrinsic heat treatment during SLM. The maximum microhardness and compressive yield strength of the alloy reached 211±4 HV and 526±12 MPa, respectively. After aging treatment at 150 ℃, the maximum microhardness and compressive yield strength of the samples were further improved to 221±4 HV and 577±5 MPa, respectively. These values are higher than those of most known aluminum alloys fabricated by SLM. This paper provides a new idea for optimizing the mechanical properties of Al-Si-Mg alloys fabricated using SLM.
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