Twinning behavior in deformation of SLM 316L stainless steel. (1st September 2022)

• Record Type: Journal Article
• Authors: Yang, Dengcui; Zhao, Yan; Kan, Xinfeng; Chu, Xiaohong; Sun, Hang; Zhao, Zhengzhi; Sun, Jiquan; Wang, Haibing
• Is Part Of: Materials research express. Volume 9:Number 9(2022)
• Publication Date: 2022-09-01
• Subjects: 316L stainless steel -- selective laser melting -- dislocation density -- deformation behavior -- twinning; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ac8bc7
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The present work investigates the microstructures, mechanical properties and deformation behaviors of the 316L stainless steel fabricated by selective laser melting (SLM). The initial dislocation density of as-SLM and conventional samples is measured using x-ray diffraction (XRD). It is found that the high dislocation density is obtained by SLM, contributing to the enhancement of yield strength. Twinning has occurred at the early stage of SLM deformation, which undergoes obvious grain rotation and twinning development during the tensile tests. However, only a few transformed martensite is presented in the deformed samples, and no significant grain orientation changes are observed.