Hot deformation behavior of Fe–27.34Mn–8.63Al–1.03C lightweight steel

Haitao Lu; Dazhao Li; Siyuan Li; Yong’an Chen

doi:10.1007/s12613-022-2531-3

Volume 30 Issue 4

Apr. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(4): 734-743

Haitao Lu, Dazhao Li, Siyuan Li, and Yong’an Chen, Hot deformation behavior of Fe–27.34Mn–8.63Al–1.03C lightweight steel, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 734-743. https://doi.org/10.1007/s12613-022-2531-3

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Haitao Lu, Dazhao Li, Siyuan Li, and Yong’an Chen, Hot deformation behavior of Fe–27.34Mn–8.63Al–1.03C lightweight steel, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 734-743. https://doi.org/10.1007/s12613-022-2531-3

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Research Article

Hot deformation behavior of Fe–27.34Mn–8.63Al–1.03C lightweight steel

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Corresponding author:
Dazhao Li E-mail: lidazhao@nuc.edu.cn
Received: 20 January 2022; Revised: 3 August 2022; Accepted: 4 August 2022; Available online: 5 August 2022

Abstract

Abstract

Hot compression tests were performed to investigate the hot deformation behavior of Fe–27.34Mn–8.63Al–1.03C lightweight steel and optimize the hot workability parameters. The temperature range was 900–1150°C and the strain rate range was 0.01–5 s⁻¹ on a Gleeble-3800 thermal simulator machine. The results showed that the flow stress increased with decreasing deformation temperature and increasing strain rate. According to the constitutive equation, the activation energy of hot deformation was 422.88 kJ·mol⁻¹. The relationship between the critical stress and peak stress of the tested steel was established, and a dynamic recrystallization kinetic model was thus obtained. Based on this model, the effects of strain rate and deformation temperature on the volume fraction of dynamically recrystallized grains were explored. The microstructural examination and processing map results revealed that the tested steel exhibited a good hot workability at deformation temperatures of 1010–1100°C and strain rate of 0.01 s⁻¹.
- Fe–Mn–Al–C steel;
- hot deformation;
- activation energy;
- microstructural evolution;
- processing map

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