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Journal of Materials Science

Erschienen in:

06.05.2021 | Metals & corrosion

New observations of the twinning effect and austenite stability in intercritical quenched and tempered steel with high strength

verfasst von: Shao-bin Bai, Wen-tao Xiao, Yi-de Wang, Da-zhao Li, Zhi-hua Zhuang, Wang-gang Zhang, Wei Liang

Erschienen in: Journal of Materials Science | Ausgabe 24/2021

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Abstract

To optimize the formability and strength of hot-rolled Fe-10Mn-0.4C-2Al-0.6 V medium Mn steel, intercritical quenching and tempering processes were carried out. The strength of the steel was enhanced, and the Lüdders platform was eliminated. The higher strength of the steel was attributed to the occurrence of a complex twinning effect, martensitic transformation and V-carbide precipitation during tensile deformation. In particular, the twin martensite structure retained after the quenching-tempering process served as another previous twin to accelerate the generation of nanomechanical twins in recrystallized austenite grain. The occurrence of transformation-induced plasticity (TRIP) of austenite with poor stability in non-recrystallized regions stimulated the TRIP and twinning-induced plasticity (TWIP) effects in austenite with high stability in recrystallized regions. Therefore, two pathways to improve the formability and optimize the mechanical properties of medium Mn steel by adjusting the quenching and tempering processes were proposed in this paper: (1) Manufacturing more martensite twin structures and (2) regulating the balance of austenite stability in both recrystallized and non-recrystallized regions.

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Titel: New observations of the twinning effect and austenite stability in intercritical quenched and tempered steel with high strength
verfasst von: Shao-bin Bai
Wen-tao Xiao
Yi-de Wang
Da-zhao Li
Zhi-hua Zhuang
Wang-gang Zhang
Wei Liang
Publikationsdatum: 06.05.2021
Verlag: Springer US
Erschienen in: Journal of Materials Science / Ausgabe 24/2021
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-021-06136-1

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