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Kinetics of Austenite Recrystallization during the Annealing of Cold-rolled Fe-Mn-Al-C Steel | ||
| Iranian Journal of Materials Forming | ||
| دوره 7، شماره 1، تیر 2020، صفحه 84-91 اصل مقاله (786.83 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijmf.2020.35660.1145 | ||
| نویسندگان | ||
| M. A. Sohrabizadeh؛ Y. Mazaheri* ؛ M. Sheikhi | ||
| Department of Materials Engineering, Bu-Ali Sina University, Hamedan, Iran | ||
| چکیده | ||
| In the current study, the recrystallization behavior of 75% cold-rolled Fe-22Mn-10Al-1.4C steel during annealing at 750, 770, 790, 810, and 830°C was studied. X-ray diffraction patterns and optical microscopy were used to characterize microstructures. The Vickers Micro-hardness test was used to characterize recrystallization kinetics during annealing. Johnson-Mehl-Avrami-Kolmogorov (JMAK) model was used to evaluate the experimental data. The as-homogenized microstructure illustrated only austenite with a high fraction of annealing twins, and austenite to martensite phase transformation was not observed after quenching at a high temperature and also until high thickness reduction. Avrami exponent was decreased from 0.76 to 0.42, with increasing the annealing temperature from 750 to 830°C. The activation energy value was determined to be ~175 kJ/mol, which was slightly higher than the diffusion activation energy of carbon in austenite. | ||
| کلیدواژهها | ||
| Fe-Mn-Al-C steel؛ Recrystallization kinetics؛ JMAK model | ||
| مراجع | ||
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