Hot deformation behavior of an austenitic Fe–20Mn–3Si–3Al transformation induced plasticity steel |
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| Affiliation: | 1. Shape Manufacturing R&D Department, Korea Institute of Industrial Technology, Incheon 21999, Republic of Korea;2. Department of Material Science and Engineering & Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea;3. Production Engineering Group, Hyundai Steel Co Ltd, Dangjin 31719, Republic of Korea;4. School of Mechanical Engineering, University of Ulsan, Ulsan 44610, Republic of Korea;5. Safety Measurement Center, Korea Research Institute of Standards and Science, Daejeon 34113 Republic of Korea;6. Department of Physics and Research Institute for Basic Sciences, Kyung Hee University, Seoul 02447, Republic of Korea;1. Department of Aircraft Airworthiness Engineering, School of Transportation Science and Engineering, Beihang University, Beijing 100191, China;2. Advanced Vehicle Research Center, Beihang University, Beijing 100191, China;3. Airworthiness Technologies Research Center, Beihang University, Beijing 100191, China;4. Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University, Beijing 100191, China;5. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;6. Branch 27, Jiuquan Satellite Launch Centre, Lanzhou 732750, China |
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| Abstract: | Hot deformation behavior of an austenitic Fe–20Mn–3Si–3Al transformation induced plasticity (TRIP) steel was investigated by hot compression tests on Gleeble 3500D thermo-mechanical simulator in the temperature ranges of 900–1100 °C and the strain rate ranges of 0.01–10 s−1. The results show that the flow stress is sensitively dependent on deformation temperature and strain rate, and the flow stress increases with strain rate and decreases with deformation temperature. The peak stress during hot deformation can be predicted by the Zener–Hollomon (Z) parameter in the hyperbolic sine equation with the hot deformation activation energy Q of 387.84 kJ/mol. The dynamic recrystallization (DRX) is the most important softening mechanism for the experimental steel during hot compression. Furthermore, DRX procedure is strongly affected by Z parameter, and decreasing of Z value lead to more adequate proceeding of DRX. |
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