| METALS AND METAL MATRIX COMPOSITES |
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| Effects of Powder Properties and Selective Laser Melting Processing on the Densification Behavior of AlSi10Mg Alloy |
DUAN Wei1, ZHAO Zhe1, JI Hongwei1, LU Yang1, CHEN Jiaxing1, NI Peishen1, DENG Xin1, LIU Jianye2,
QI Wenjun2, NIU Liuhui2, GAO Wenhua2
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1 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006
2 Guangdong Hanbang 3D Technology Co., Ltd., Zhongshan 528427 |
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Abstract This study is focused on the investigation of the effects of powder properties and selective laser melting (SLM) processing parameters on densification behavior of AlSi10Mg alloy. The densification behavior of the SLM processed samples made from two kinds of AlSi10Mg alloy powders with different particle size distributions was studied, the results show that particle size distribution of AlSi10Mg powder is critical to the densification behavior during SLM processing, and the higher content of coarser particles results in the higher density of SLM processed samples. By choosing the AlSi10Mg powders with better SLM processed density, the effect of SLM processing parameters on the density was investigated by using Box-Behnken response surface methodology. A quantitative relationship model between SLM processing parameters and the relative density of SLM processed samples was obtained. It is found that among the SLM processing parameters, laser power has the most significant influence on the relative density of SLM processed samples, followed by scanning speed, and hatch space. When the laser power is 375 W, scanning speed is 2 000 mm/s, and hatch space is 50 μm, the relative density and tensile strength of AlSi10Mg printed samples can reach 98.26% and 487 MPa, respectively.
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Published: 16 May 2019
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| Fund:This work was financially supported by Guangdong Science and Technology Major Project (2017B090911006). |
About author:: Wei Duan, a master degree candidate in Guangdong University of Technology, is working on SLM processing of metals. He has 3 invention patent applications.
Xin Deng is currently a distinguished professor at School of Electromechanical Engineering, Guangdong University of Technology. Professor Deng has developed expertise in a wide range of materials including lead-free solders, metal matrix composite, cemented carbides, polycrystalline diamond, and wear resistant coatings. His research interests also include fracture-mechanical behavior and finite element simulation of powder metallurgy, hard materials, and metal matrix composite, 3D printing of cemented carbide and metal matrix composite, and other advanced material processing technologies. Professor Deng has authored/co-authored over 40 peer reviewed research papers and 8 US patents with 3 patents autho-rized. |
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2019, Vol. 33 
