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

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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.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52071300 and 51904278), the Special Funding Projects for Local Science and Technology Development guided by the Central Committee (No. YDZX20191400004587), the Key Research and Development Project of Zhejiang Province, China (No. 2020C01131), and the Innovation projects of colleges and universities in Shanxi Province, China (No. 2019L0577).

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  1. School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China

    Haitao Lu, Dazhao Li, Siyuan Li & Yong’an Chen

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  1. Haitao Lu
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  2. Dazhao Li
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Correspondence to Dazhao Li.

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Lu, H., Li, D., Li, S. et al. Hot deformation behavior of Fe-27.34Mn-8.63Al-1.03C lightweight steel. Int J Miner Metall Mater 30, 734–743 (2023). https://doi.org/10.1007/s12613-022-2531-3

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