Influence of initial microstructures on intercritical annealing behaviour in a medium Mn steel
- Title
- Influence of initial microstructures on intercritical annealing behaviour in a medium Mn steel
- Author
- 김진경
- Keywords
- Medium Mn TRIP steels; austenite; reverse transformation; annealing; martensite; diffusion
- Issue Date
- 2019-11
- Publisher
- Taylor and Francis Ltd.
- Citation
- Materials Science and Technology, v. 35, No. 17, Page. 2092-2100
- 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.
- URI
- https://www.tandfonline.com/doi/full/10.1080/02670836.2018.1475445https://repository.hanyang.ac.kr/handle/20.500.11754/125367
- ISSN
- 0267-0836; 1743-2847
- DOI
- 10.1080/02670836.2018.1475445
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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