Manganese micro-segregation governed austenite re-reversion and its mechanical effects
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manuscript.docx
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1.75 MB
Format
Microsoft Word XML
Checksum (MD5)
b57cfd853bad2556a2ad43ad3dc6b982
Author(s)
Wang, Meimei
Jiang, Menglei
Tasan, Cemal
Date Issued
April 2020
Journal
Scripta Materialia
Publisher
Elsevier BV
Citation
Wang, Meimei et al. "Manganese micro-segregation governed austenite re-reversion and its mechanical effects." Scripta Materialia 179 (April 2020): 75-79 © 2019 Acta Materialia Inc
Version
Author's final manuscript
Abstract
Martensite that is mechanically induced from reverted austenite can be reverted again to austenite upon annealing. Carrying out mechanical tests, electron backscatter diffraction, electron channeling contrast imaging, and energy-dispersive X-ray spectroscopy analyses, we observe that Mn micro-segregation governs this re-reversion process in a martensite-reverted-austenite steel. The annealing treatment cannot fully revert all strain-induced effects in this multi-phase alloy (i.e., ductile damage, grain shape change) and introduces some new changes (e.g. precipitate size in martensite). However, the resulting microstructure exhibits the original mechanical response even after multiple reversions, demonstrating the governing role of the mechanically induced martensitic transformation on strain hardening.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.scriptamat.2019.12.032
