Stabilizing austenite via a core-shell structure in the medium Mn steels. (June 2019)

• Record Type: Journal Article
• Authors: Wan, Xinhao; Liu, Geng; Ding, Ran; Nakada, Nobuo; Chai, Yaw-Wang; Yang, Zhigang; Zhang, Chi; Chen, Hao
• Is Part Of: Scripta materialia. Number 166(2019)
• Page Start: 68
• Page End: 72
• Publication Date: 2019-06
• Subjects: Steels -- Microstructure -- Retained austenite -- Core-shell structure; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.03.015
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Retained austenite plays a significant role in the strength-ductility balance of medium Mn steels. In this contribution, a new processing route (Flash-Austenite Reversion Treatment, Flash-ART) was proposed to design retained austenite with a compositional core-shell structure in an Fe-0.20C-7.76Mn-1.99Al (wt%) steel. It was interestingly found that the austenite core, which should transform into martensite based on its composition and size, was stabilized by the Mn enriched shell. Flash-ART allows us to obtain more retained austenite compared with the conventional ART. Graphical abstract: Unlabelled Image