کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1578237 1001202 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prediction of hot deformation behaviour of Fe–25Mn–3Si–3Al TWIP steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Prediction of hot deformation behaviour of Fe–25Mn–3Si–3Al TWIP steel
چکیده انگلیسی

Hot deformation behaviour of Fe–25Mn–3Si–3Al twinning-induced plasticity (TWIP) steel was investigated by hot compression testing on Gleeble 3500 thermo-mechanical simulator in the temperature range from 800 to 1100 °C and at strain rate range from 0.01 to 5 s−1, and the microstructural evolution was studied by metallographic observations. The results show that the true stress–true strain curves exhibit a single peak stress at certain strain, after which the flow stresses decrease monotonically until the end of deformation, showing a dynamic flow softening. The peak stress level decreases with increasing deformation temperature and decreasing strain rate, which can be predicted by the Zener–Hollomon (Z) parameter in the hyperbolic sine equation with the hot deformation activation energy Q of 405.95 kJ/mol. The peak and critical strains can also be predicted by Z parameter in power-law equations, and the ratio of critical strain to peak strain is about 0.7. 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 the decreasing of Z value leads to more extensive DRX.


► Hot deformation activation energy Q of Fe–25Mn–3Si–3Al steel is 405.95 kJ/mol.
► The value of Q is close to that of 304 austenitic stainless steels.
► The peak stress of this steel can be accurately described by Z parameter.
► DRX is the main flow softening mechanism during hot deformation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 528, Issue 28, 25 October 2011, Pages 8084–8089
نویسندگان
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