Low-temperature superplasticity of Si-added medium-Mn steel

Low-temperature superplasticity of Si-added medium-Mn steel

Hyun-Bin Jeong, Seok-Won Choi, Seok-Hyeon Kang, Young-Kook Lee

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Abstract. Grain boundary sliding, a deformation mechanism of superplasticity, occurs only at high temperatures, making it difficult for superplastic steels to be practically applied due to high energy consumption and surface oxidation. Therefore, in the present study, we introduce a newly developed Si-added medium-Mn steel, which can be superplastically deformed at such a low temperature of 763 K. The low-temperature superplasticity of this steel was caused by grain boundary sliding between recrystallized α grains and dynamically reverted γ grains. The steel also exhibited high room-temperature tensile strength (1336 MPa) after the superplastic forming simulation.

Low-Temperature Superplasticity, Dynamic Reverse Transformation, Grain Boundary Sliding, High Strength Steel

Published online , 6 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Hyun-Bin Jeong, Seok-Won Choi, Seok-Hyeon Kang, Young-Kook Lee, Low-temperature superplasticity of Si-added medium-Mn steel, Materials Research Proceedings, Vol. 32, pp 167-172, 2023

DOI: https://doi.org/10.21741/9781644902615-18

The article was published as article 18 of the book Superplasticity in Advanced Materials

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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