The Formability and Mechanical Properties of 316L Stainless Steel Fabricated by Pulsed Arc Swing Additive Manufacturing

Author:

Meng Wei12ORCID,Pan Qinyue2,Ye Kai2,Chen Kai12,Hu Jiahao2,Yin Xiaohui12

Affiliation:

1. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of Education (Anhui University of Technology) Ma'anshan 243002 China

2. School of Materials Science and Engineering Anhui University of Technology Ma'anshan 243032 China

Abstract

An austenitic stainless steel 316L deposition specimen is fabricated by cold metal transfer‐based swing arc additive manufacturing (CMT‐SAAM), and its formation, microstructure, and tensile properties are investigated. The results showed that the 316L deposited samples exhibited a multi‐layer structure with a small aspect ratio, and the surface forming accuracy is improved with the increase in the swing amplitude. The remelted zone near the interface is dominated by long grains perpendicular to the fusion line, whereas the deposited zone is dominated by columnar dendrites and shows an <100> orientation. Along the building and transverse direction of the swing deposits, the microhardness distribution is uniform. Compared with rollings and forgings, 316L deposited by using the CMT‐SAAM method has both a higher strength and toughness. The average ultimate tensile strength is 573 MPa, and the elongation at break is 52.6%. The high strength and toughness of 316L specimens are attributed to the fine microstructure, high‐density dislocations, and low‐angle grain boundaries (LAGBs) generated during the CMT‐SAAM process.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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