Heterogeneous microstructure and voids dependence of tensile deformation in a selective laser melted AlSi10Mg alloy

被引：79

作者：

Ben, D. D. ^{[1
,2
]}

Ma, Y. R. ^{[1
,2
]}

Yang, H. J. ^{[1
,2
]}

Meng, L. X. ^{[1
,2
]}

Shao, X. H. ^{[2
,3
]}

Liu, H. Q. ^{[1
,2
]}

Wang, S. G. ^{[3
]}

Duan, Q. Q. ^{[1
]}

Zhang, Z. F. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Lab Fatigue & Fracture Mat, Inst Met Res, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Dept Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 798卷

基金：

中国国家自然科学基金;

关键词：

AlSi10Mg alloy; Selective laser melting; Heterogeneous microstructures; Strain localization; Voids; MECHANICAL-PROPERTIES; PROCESS PARAMETERS; STAINLESS-STEEL; STRENGTH; BEHAVIOR; TEXTURE; SLM; PRECIPITATION; SIMULATION; PARTICLES;

D O I：

10.1016/j.msea.2020.140109

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructure and voids evolution of a selective laser melted (SLM) AlSi10Mg alloy during tension were sys-tematically investigated. The SLM AlSi10Mg sample is featured with a multi-level heterogeneous microstructure that is composed of melt pools (MPs), columnar Al grains and sub-cells. According to the Si morphologies and thermal history, the MP could be divided into three regions, including the fine structure zone (FSZ), remelted zone (RMZ) and heat-affected zone (HAZ), respectively. The Si segregation phenomenon on sub-cells boundaries is observed and may attributed to the constitutional supercooling. The tensile deformation behaviors of the vertical sample (V-sample) vary from the horizontal sample (H-sample) for that heterogeneous microstructure arises strain localization in V-sample. In addition, the voids have no obvious effect on the uniform plastic deformation, while they may affect the non-uniform deformation during tension. The combined effects of strain localization and void contribute to the earlier break in V-samples than in H-samples.

引用

页数：11

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