کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620533 | 988634 | 2012 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of flow stress in cool deformed Nb-microalloyed steel by combining strain induced transformation of retained austenite, cooling rate and heat treatment
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study cool deformation was incorporated in the overall thermo-mechanical processing of a Nb-microalloyed steel. Included in this was the effect of cooling rate subsequent to hot rolling on precipitate formation in the ferrite phase. The results show that increasing the cooling rate prevents precipitate formation in the ferrite phase at the cool deformation temperature. As well, the amount of retained austenite under the low cooling condition in the temperature range of cool deformation, 700-300 °C, was measured by neutron diffraction. It is then shown that strain-induced transformation of retained austenite to martensite is the main factor in increasing the strength of cool deformed Nb microalloyed steel. Combining accelerated cooling, strain-induced transformation of austenite to martensite during cool deformation and a subsequent heat treatment stage to increase precipitation maximizes the flow stress of the steel. Finally, it is shown that this process also lowers the yield strength/ultimate strength ratio.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 60, Issue 3, February 2012, Pages 1221-1229
Journal: Acta Materialia - Volume 60, Issue 3, February 2012, Pages 1221-1229
نویسندگان
S.H. Mousavi Anijdan, Dimitry Sediako, Steve Yue,