Microstructure, porosity and mechanical properties of selective laser melted AlSi10Mg

作     者：Jing CHEN Wei HOU Xiuzhuan WANG Songlin CHU Zhiyi YANG Jing CHEN;Wei HOU;Xiuzhuan WANG;Songlin CHU;Zhiyi YANG

作者机构：Joint Laboratory of 3D Enable R&D TechnologyAECC Aero Engine Control System InstituteWuxi 214063China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2020年第33卷第7期

页      面：2043-2054页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：the financial support from the National Key Research and Development Program of China(No.2018YFB1106400) 

主　　题：AlSi10Mg Mechanical property Microstructure Porosity Selective laser melting 

摘      要：Finite element modeling(FEM),microscopy,X-ray computed tomography(CT)and mechanical property tests were used to study the microstructure,porosity and mechanical properties of an AlSi10Mg alloy produced by selective laser melting(SLM).The simulation of the melt pool and thermal history under different energy densities produced an optimized result with an energy density of 44.5 J·*** high cooling rate during the SLM process significantly refined the previous a-Al *** growth direction of the network-like Al-Si eutectic structure at different orientations confirmed the anisotropic nature of the ***,the microhardness,tensile testing and fracture analysis results proved that there were no obvious distinctions in the strength between the transverse and longitudinal directions,and that the ductility was anisotropic,possibly due to the shape and distribution of the *** pores measured by X-ray CT at different energy densities confirmed that the sphericity of the pores was inversely related to pores *** optimized processing conditions,the porosity of the selective laser melted sample decreased leading to the improved fabricated fuel system component via SLM.