Effect of construction angles on microstructure and mechanical properties of AlSi10Mg alloy fabricated by selective laser melting

被引：96

作者：

Li, Xiaofeng ^{[1
,2
]}

Yi, Denghao ^{[1
,3
]}

Wu, Xiaoyu ^{[1
]}

Zhang, Jinfang ^{[1
,2
]}

Yang, Xiaohui ^{[4
]}

Zhao, Zixuan ^{[2
]}

Feng, Yinghao ^{[1
,5
]}

Wang, Jianhong ^{[1
]}

Bai, Peikang ^{[1
]}

Liu, Bin ^{[2
]}

Liu, Yong ^{[2
]}

机构：

[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[3] Beijing Univ Technol, Fac Mat & Mfg, Inst Laser Engn, Beijing 100124, Peoples R China

[4] Taiyuan Univ Sci & Technol, Instrumental Anal Ctr, Taiyuan 030024, Peoples R China

[5] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 881卷

基金：

中国国家自然科学基金;

关键词：

Selective laser melting; AlSi10Mg alloy; Construction angles; Anisotropy; CRYSTALLOGRAPHIC TEXTURE; TENSILE PROPERTIES; PROCESS PARAMETERS; ORIENTATION; PARTS; DEPENDENCY; STRENGTH; POROSITY; DEFECTS; FATIGUE;

D O I：

10.1016/j.jallcom.2021.160459

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, seven AlSi10Mg bulks with different construction angles (0 degrees, 15 degrees, 30 degrees, 45 degrees, 60 degrees, 75 degrees, and 90 degrees) were fabricated by selective laser melting (SLM). The effects of different construction angles on the microstructure and mechanical properties of AlSi10Mg alloys were investigated. Increasing the construction angle changed the laser track segments from an ellipse to a semi-ellipse and then to fish-scale, specifically again from a semi-ellipse to an ellipse, due to the decrease of the laser radiation area. Meanwhile, the grains in the vertical planes changed from columnar grains to irregularly arranged grains, and then to equiaxed grains. The 45 degrees sample exhibited the highest hardness of 154.44 HV0.1. The 60 degrees sample had a good combination of strength and plasticity with a tensile strength of 463.54 MPa, yield strength of 283.37 MPa, and elongation of 9.25%. The observed mechanical property anisotropy of the current AlSi10Mg alloy was a result of the pores, equiaxed grain structure, ultra-fine equiaxed sub-grains, and working hardening. In addition, the difference in the sample microstructures was attributed to the construction angles and deposited layer area. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：12

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