A comparative study of microstructure and hydrogen embrittlement of selective laser melted and wrought 17–4 PH stainless steel

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 785; p. 139363
• Main Authors: Alnajjar, Michella, Christien, Frédéric, Bosch, Cédric, Wolski, Krzysztof
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 21.05.2020; Elsevier BV; Elsevier
• Subjects: Additive manufacturing; Aging (metallurgy); Austenite; Austenitic stainless steels; Brittle fracture; Cleavage; Comparative studies; Cooling rate; Crack initiation; Crack propagation; Delta ferrite; Ductile fracture; Ductile-brittle transition; Engineering Sciences; Ferritic stainless steels; Fracture surfaces; Grain boundaries; Grain size; Hydrogen; Hydrogen cracking; Hydrogen embrittlement; Interganular; Intergranular fracture; Laser beam melting; Martensitic stainless steels; Materials; Microstructure; Overloading; Precipitation hardening steels; Room temperature; Selective laser melting; Slow strain rate; Stainless steel; Subcritical crack growth; Tensile tests; Hydrogen cracking; Selective laser melting; Interganular; Cleavage; Additive manufacturing; Martensitic stainless steels; Subcritical crack growth; Hydrogen embrittlement; Hydrogen embrittlement Hydrogen cracking Additive manufacturing Selective laser melting Martensitic stainless steels Subcritical crack growth Interganular Cleavage
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2020.139363

In this study, the microstructure and hydrogen embrittlement of 17–4 PH stainless steel produced by Selective Laser Melting (SLM) were investigated. The microstructure of SLM-ed 17–4 PH stainless steel was found to be fully ferritic, in contrast to the wrought martensitic steel. This finding was cor...