Effects of Bulk Laser Energy Density on Anisotropy of Selective Laser Sintered 316L Stainless Steel

被引：0

作者：

Zong X. ^{[1
]}

Gao Q. ^{[1
]}

Zhou H. ^{[2
]}

Zhang J. ^{[1
]}

Qi T. ^{[2
]}

机构：

[1] College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, Shaanxi

[2] Suzhou Zhongrui Zhichuang 3D Technology Co., Ltd., Suzhou, 215223, Jiangsu

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2019年 / 46卷 / 05期

关键词：

316L stainless steel; Anisotropy; Bulk laser energy density; Materials; Microstructure; Selective laser melting;

D O I：

10.3788/CJL201946.0502003

中图分类号：

学科分类号：

摘要：

Selective laser melting (SLM) is used to rapidly form 316L stainless steels formed when the laser rotation angle is 73° and the powder layer is 30-μm thick, and the effects of bulk laser energy density and forming direction on the anisotropy of microstructure and mechanical properties of the formed parts are studied. The results show that the forming direction has a great influence on the mechanical properties, and the anisotropy of the mechanical property varies with the anisotropy of the microstructure. As the bulk laser energy density increases, the surface of the molten pool tends to be flat, the grain growth directions of formed part become singular in the x and y directions, and the grain growth direction of formed part in the z direction is obviously orientation-dependent. When the bulk laser energy density is 65-85 J•mm-3, the crystal growth direction is well aligned with the stacking direction, and the tensile strength and the percentage elongation after fracture are optimal. Therefore, the bulk laser energy density can be used for controlling the microstructure and mechanical properties of formed parts. © 2019, Chinese Lasers Press. All right reserved.

引用

共 24 条

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