期刊
SCRIPTA MATERIALIA
卷 178, 期 -, 页码 7-12出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.10.040
关键词
Selective laser melting; Retained austenite; 15-5PH; Microstructure; Mechanical properties
类别
资金
- National Key Research and Development Program of China [2017YFB0306100]
- National Natural Science Foundation of China [51271034]
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.
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