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
1 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006 2 Guangdong Hanbang 3D Technology Co., Ltd., Zhongshan 528427
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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2019, Vol. 33 
