Selective laser melting and heat treatment of precipitation hardening stainless steel with a refined microstructure and excellent mechanical properties

被引：85

作者：

Nong, X. D. ^{[1
]}

Zhou, X. L. ^{[1
]}

Li, J. H. ^{[2
]}

Wang, Y. D. ^{[1
]}

Zhao, Y. F. ^{[2
]}

Brochu, M. ^{[3
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] McGill Univ, Dept Mech Engn, Montreal, PQ H2A 0C3, Canada

[3] McGill Univ, Dept Min & Mat Engn, Montreal, PQ H3A 0C5, Canada

来源：

SCRIPTA MATERIALIA | 2020年 / 178卷

基金：

中国国家自然科学基金;

关键词：

Selective laser melting; Retained austenite; 15-5PH; Microstructure; Mechanical properties; STRENGTHENING MECHANISMS; BEHAVIOR; AUSTENITE; EVOLUTION; ALLOY;

D O I：

10.1016/j.scriptamat.2019.10.040

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, we concentrated on the microstructural characteristics and mechanical properties of precipitation hardening (PH) stainless steel 15-5PH via Selective laser melting (SLM). A large amount of retained austenite was observed in the as-built samples which contribute to excellent ductility. The amount of retained austenite reduced greatly after heat treatment and the remaining minor retained austenite completely transformed to martensite during tensile process. A finer grain structure and a concentration of dislocations around the inclusions and at the submicron grain boundaries following heat treatment promoted SLM 15-5PH to demonstrate a higher strength than those of wrought samples. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：7 / 12

页数：6

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