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Open AccessArticle

Transformation-Induced Ductility of Reverse Austenite Evolved by Low-Temperature Tempering of Martensite

1
State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
2
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
3
Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W. University Avenue, El Paso, TX 79968, USA
*
Author to whom correspondence should be addressed.
Metals 2020, 10(10), 1343; https://doi.org/10.3390/met10101343
Received: 11 September 2020 / Revised: 30 September 2020 / Accepted: 2 October 2020 / Published: 7 October 2020
(This article belongs to the Special Issue Reversed Transformation in Iron-Based Alloys)
A novel steel combining the “quenching and tempering (Q&T)” process was exploited that can achieve the enhancement of austenite by interface migration during tempering the martensitic matrix mixed with films of austenite. A high uniform elongation (12%) combined with high yield tensile strength (1500 MPa) was obtained, which showed distinct advantages over all the other advanced high strength steels under development for a lightweight car body. Furthermore, the effect of austenite on enhancement of ductility in “Q&T” steels with a martensite matrix was elucidated, which suggested that the ductility was promoted by enhancing boundary sliding and delaying work hardening of the martensitic matrix. View Full-Text
Keywords: quenching and partitioning steels; interface migration; austenite stability; martensite plasticity; work hardening rate quenching and partitioning steels; interface migration; austenite stability; martensite plasticity; work hardening rate
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MDPI and ACS Style

Du, P.; Chen, P.; Misra, D.K.; Wu, D.; Yi, H. Transformation-Induced Ductility of Reverse Austenite Evolved by Low-Temperature Tempering of Martensite. Metals 2020, 10, 1343.

AMA Style

Du P, Chen P, Misra DK, Wu D, Yi H. Transformation-Induced Ductility of Reverse Austenite Evolved by Low-Temperature Tempering of Martensite. Metals. 2020; 10(10):1343.

Chicago/Turabian Style

Du, Pengju; Chen, Peng; Misra, Devesh K.; Wu, Di; Yi, Hongliang. 2020. "Transformation-Induced Ductility of Reverse Austenite Evolved by Low-Temperature Tempering of Martensite" Metals 10, no. 10: 1343.

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