Reverse transformation from martensite into austenite in a medium-Mn steel. (1st March 2019)

• Record Type: Journal Article
• Authors: Yang, D.P.; Wu, D.; Yi, H.L.
• Is Part Of: Scripta materialia. Number 161(2019)
• Page Start: 1
• Page End: 5
• Publication Date: 2019-03-01
• Subjects: Mechanical stabilisation -- Displacive transformation -- Reconstructive transformation -- Austenite reverse transformation -- Medium Mn steel; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.09.046
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The mechanism of austenite reversion from martensite in a cold rolled medium‑manganese steel has been clarified. Both displacive and reconstructive transformation happens but at a specific temperature ranges. Mechanical stabilisation of martensite into austenite were observed to take place between 300 °C and 500 °C proving the transformation at this temperature range is displacive. The time-dependent characteristic and the plastic deformation stimulating austenite transformation reveal that the transformation occurs above 500 °C is reconstructive. A thermodynamic theory was developed to express the mechanical stabilisation phenomenon of martensite. Graphical abstract: