The effects of fabrication atmosphere condition on the microstructural and mechanical properties of laser direct manufactured stainless steel 17-4 PH

被引：43
|
作者：
Wang, D. [1 ]
Chi, C. T. [2 ]
Wang, W. Q. [3 ]
Li, Y. L. [3 ]
Wang, M. S. [2 ]
Chen, X. G. [1 ]
Chen, Z. H. [4 ]
Cheng, X. P. [1 ]
Xie, Y. J. [2 ]
机构：
[1] Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Jiangxi, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
[3] Nanchang Univ, Sch Mech & Elect Engn, Nanchang 330029, Jiangxi, Peoples R China
[4] Jiangxi Reman Addit Technol Co Ltd, Nanchang 330096, Jiangxi, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2019年 / 35卷 / 07期
关键词：
Additive manufacturing; Laser direct manufacturing; 17-4 PH stainless steel; Fabrication atmosphere; Mechanical properties; REVERTED AUSTENITE; DEPOSITION; EVOLUTION; BEHAVIOR; POROSITY;
D O I：
10.1016/j.jmst.2019.03.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of atmosphere conditions on microstructural and mechanical properties of stainless steel 17-4PH components fabricated by laser direct manufacturing (LDM) were investigated through measurements on phase constitution, porosity, tensile strength, fracture morphology, hardness and evolution of substrate temperature. Results showed that the samples produced in air atmosphere condition possessed higher tensile strength and hardness for both as-deposited and heat-treated states than that in Ar chamber condition, due to dispersion strengthening effect of amorphous oxide particles and nitrogen solution strengthening as a result of higher content of oxygen and nitrogen. The temperature of substrate heat accumulation was higher in Ar chamber condition, leading to dramatically lower porosity and more reverse austenite, which also contributed to the lower strength and hardness. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：1315 / 1322
页数：8
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