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Article

Tailoring the Austenite Fraction of a Cu and Ni Containing Medium-Mn Steel via Warm Rolling

1
Steel Institute, RWTH Aachen University, 52072 Aachen, Germany
2
Department of Metallurgical and Materials Engineering, Suez University, Suez 43528, Egypt
3
Central Facility for Electron Microscopy, RWTH Aachen University, 52074 Aachen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Zhengyou Tang
Metals 2021, 11(12), 1888; https://doi.org/10.3390/met11121888
Received: 28 October 2021 / Revised: 16 November 2021 / Accepted: 19 November 2021 / Published: 23 November 2021
(This article belongs to the Special Issue Microstructures and Mechanical Properties of TRIP/TWIP Steels)
Developing medium-Mn steels (MMnS) demands a better understanding of the microstructure evolution during thermo-mechanical treatments (TMTs). This study demonstrates the relationship among processing, microstructure, and mechanical properties of a warm-rolled medium-Mn steel (MMnS) containing 1.5 wt. % Cu and 1.5 wt. % Ni. After short-time warm rolling (WR) in an intercritical temperature range, a significant quantity (40.6 vol.%) of austenite was reverted and retained after air cooling. The microstructure and tensile properties of the WR specimens were compared with two typical process routes, namely hot rolling+ cold rolling+ annealing+ tempering (CRAT) and warm rolling+ annealing+ tempering (WRAT). The WR specimen exhibited comparable tensile properties with the CRAT specimens (967 MPa yield strength, 1155 MPa tensile strength, 23% total elongation), with a remarkably shortened process route, which was derived from the dislocation accumulation and austenite reversion during rolling. The WR route stands out among the traditional CRAT and the extended WRAT routes for its excellent tensile properties and compact processing route. View Full-Text
Keywords: medium manganese steels (MMnS); warm rolling; high-energy synchrotron X-ray diffraction; thermo-mechanical treatment medium manganese steels (MMnS); warm rolling; high-energy synchrotron X-ray diffraction; thermo-mechanical treatment
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MDPI and ACS Style

Xu, Z.; Li, J.; Shen, X.; Allam, T.; Richter, S.; Song, W.; Bleck, W. Tailoring the Austenite Fraction of a Cu and Ni Containing Medium-Mn Steel via Warm Rolling. Metals 2021, 11, 1888. https://doi.org/10.3390/met11121888

AMA Style

Xu Z, Li J, Shen X, Allam T, Richter S, Song W, Bleck W. Tailoring the Austenite Fraction of a Cu and Ni Containing Medium-Mn Steel via Warm Rolling. Metals. 2021; 11(12):1888. https://doi.org/10.3390/met11121888

Chicago/Turabian Style

Xu, Zigan, Jiyao Li, Xiao Shen, Tarek Allam, Silvia Richter, Wenwen Song, and Wolfgang Bleck. 2021. "Tailoring the Austenite Fraction of a Cu and Ni Containing Medium-Mn Steel via Warm Rolling" Metals 11, no. 12: 1888. https://doi.org/10.3390/met11121888

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