Mechanical properties and corrosion behavior of selective laser melted 316L stainless steel after different heat treatment processes

被引：371

作者：

Kong, Decheng ^{[1
]}

Dong, Chaofang ^{[1
]}

Ni, Xiaoqing ^{[2
]}

Zhang, Liang ^{[2
]}

Yao, Jizheng ^{[1
]}

Man, Cheng ^{[3
]}

Cheng, Xuequn ^{[1
]}

Xiao, Kui ^{[1
]}

Li, Xiaogang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Key Lab Corros & Protect MOE, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[2] Shanghai Res Inst Mat, Shanghai Engn Res Ctr 3D Printing Mat, Shanghai 200437, Peoples R China

[3] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Shandong, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2019年 / 35卷 / 07期

基金：

中国国家自然科学基金;

关键词：

316L stainless steel; Selective laser melting; Heat treatment; Microstructure; Mechanical property; Corrosion behaviour; ELECTROCHEMICAL-BEHAVIOR; HIGH-STRENGTH; MICROSTRUCTURE; RESISTANCE; GROWTH; PH;

D O I：

10.1016/j.jmst.2019.03.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Irregular grains, high interfacial stresses and anisotropic properties widely exist in 3D-printed metallic materials, and this paper investigated the effects of heat treatment on the microstructural, mechanical and corrosion properties of 316 L stainless steel fabricated by selective laser melting. Sub-grains and low-angle boundaries exist in the as-received selective laser melted (SLMed) 316 L stainless steel. After heat treatment at 1050 degrees C, the sub-grains and low-angle boundaries changed slightly, and the stress state and strength decreased to some extent due to the decrease of dislocation density. After heat treatment at 1200 degrees C, the grains became uniform, and the dislocation cells vanished, which led to a sharp decline in the hardness and strength. However, the ductility was improved after recrystallization heat treatment. The passive film thickness and corrosion potential of the SLMed 316 L stainless steel decreased after heat treatment, and the pitting potential also decreased due to the accelerated transition from metastable to steady-state pitting; this accelerated transition was caused by the presence of weak passive films at the enlarged pores after heat treatment, especially for an adequate solid solution treatment. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：1499 / 1507

页数：9

共 52 条

[1] Property evaluation of 304L stainless steel fabricated by selective laser melting [J].