Microstructure and performances for 15-5 PH stainless steel fabricated through the wire-arc additive manufacturing technology. (6th December 2021)

• Record Type: Journal Article
• Authors: Guo, Chun; Hu, Ruizhang; Chen, Feng
• Is Part Of: Materials technology. Volume 36:Number 14(2021)
• Page Start: 831
• Page End: 842
• Publication Date: 2021-12-06
• Subjects: Wire-arc additive manufacturing -- 15-5 PH -- stainless steel -- microscopic structure -- performances; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Technological innovations -- Periodicals; 620.1105
• DOI: 10.1080/10667857.2020.1800296
• Languages: English
• ISSNs: 1066-7857

Abstract

ABSTRACT: In this study, we prepared the 15-5 PH stainless steel samples using the wire-arc additive manufacturing (WAAM) technique. The performances for as-welded samples and samples after post-weld heat treatment (1050°C×1 h) was studied systematically. The main phases are martensite and grain boundary precipitates. There are many dislocations in the crystal structure of the as-welded samples. The Cu phase and Nb phase precipitate, and the number of dislocations in the post-weld heat-treated samples decrease. The microhardness is even in the sample transverse and longitudinal sections, with mean values for the as-welded sample of349.5 HV0.2 and 345.5 HV0.2, respectively, and for the heat-treated sample of 349.7 HV0.2 and 349.2 HV0.2, respectively. The yield strength of the as-welded sample is 666 MPa, the tensile strength is 1080 MPa. The yield strength of the heat-treated sample is 611 MPa, the tensile strength is 1105 MPa.