Influence of initial microstructures on intercritical annealing behaviour in a medium Mn steel
SCIE
SCOPUS
- Title
- Influence of initial microstructures on intercritical annealing behaviour in a medium Mn steel
- Authors
- Yong Hoon Choi; Joo Hyun Ryu; Sea Woong Lee; Kyooyoung Lee; LEE, BYEONG JOO; Jin-Kyung Kim; Jae Sang Lee; Dong-Woo Suh
- Date Issued
- 2019-11
- Publisher
- TAYLOR & FRANCIS LTD
- Abstract
- The present work reports the effect of different initial microstructures on reverse transformation kinetics and morphologies of austenite formed during intercritical annealing in Fe-0.14C-7Mn-1Si (wt-%) medium Mn steel. Three different initial microstructures were produced by cold-rolling and cold-rolling followed by austenitisation at 820?C and 900?C. The specimen austenitised at higher temperature shows lath-type austenite after intercritical annealing. The difference in austenitisation temperature leads to different Mn distribution in martensitic initial microstructures, thereby leading to a difference in morphology of austenite. The inhomogeneous Mn profiles in initial microstructures also affect reverse transformation kinetics of austenite upon intercritical annealing. The presence of Mn-enriched regions accelerates austenite growth at an early stage of intercritical annealing but retards the transformation kinetics afterwards. This paper is part of a Thematic Issue on Medium Manganese Steels.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95881
- DOI
- 10.1080/02670836.2018.1475445
- ISSN
- 0267-0836
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND TECHNOLOGY, vol. 35, no. 17, page. 2092 - 2100, 2019-11
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