Microstructure and properties of AlSi7Mg alloy fabricated by selective laser melting

作     者：Shuai Huang Shao-qing Guo Biao Zhou Guo-hui Zhang Xue-jun Zhang Shuai Huang;Shao-qing Guo;Biao Zhou;Guo-hui Zhang;Xue-jun Zhang

作者机构：3D Printing Research and Engineering Technology CenterBeijing Institute of Aeronautical MaterialsBeijing 100095China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2021年第18卷第4期

页      面：416-423页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the fund of Beijing Municipal Science and Technology Commission(Z181100003318001) 

主　　题：selective laser melting AlSi7Mg alloy microstructure mechanical property 

摘      要：The AlSi7Mg alloy was fabricated by selective laser melting(SLM),and its microstructure and properties at different building directions after heat treatment were *** show that the microstructure of SLM AlSi7Mg samples containes three zones:fine grain zone,coarse grain zone,and heat affected *** fine-grain regions locate inside the molten pool,and the grains are *** coarse-grain regions locate in the overlap of molten *** T6 treatment,the microstructure at the molten pool boundary is still the network eutectic Si,but the network structure becomes discrete,and is composed of intermittent,chain-like eutectic Si *** yield strength at three directions(xy,45°,z direction)of the AlSi7Mg alloy samples fabricated by SLM is improved after T6 heat *** fracture mechanism of the samples is a mixed ductile and brittle fracture before heat treatment and ductile fracture after heat treatment.