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Quenching and partitioning (Q&P) processed medium Mn steel starting from heterogeneous microstructure SCOPUS

Title
Quenching and partitioning (Q&P) processed medium Mn steel starting from heterogeneous microstructure
Authors
Kim J.H.Kwon M.-H.Gu G.Lee J.S.Suh D.-W.
Date Issued
2020-08
Publisher
Elsevier BV
Abstract
We examine the microstructure and tensile properties of the quenching and partitioning (Q&P) processed medium Mn steels having different starting microstructure. Heterogeneous Mn distribution led by intercritical annealing prior to the Q&P process is more effective in retaining higher fraction of austenite; a major fraction of austenite exists as Mn-rich islands surrounded by martensite. Starting with uneven Mn distribution prior to the Q&P process enhanced the austenite stability by high Mn concentration and shielding effect by neighboring martensite. It contributed to the impressive tensile properties by operating multiple plasticity mechanisms: transformation-induced plasticity (TRIP) with twinning-induced plasticity (TWIP). © 2020
URI
https://oasis.postech.ac.kr/handle/2014.oak/106955
DOI
10.1016/j.mtla.2020.100757
ISSN
2589-1529
Article Type
Article
Citation
Materialia, vol. 12, 2020-08
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