کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5456194 | 1514655 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Warm ductility of 0.2% C-1.5% Si-5% Mn TRIP-aided steel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Warm tensile properties of 0.2% C-1.5% Si-5.0% Mn transformation-induced plasticity (TRIP)-aided steel sheets with annealed martensite matrix and retained austenite of 39.4 vol% were investigated for automotive applications. The product of tensile strength and total elongation (TSÃTEl) of the TRIP-aided steel was enhanced to 50 GPa% by warm deformation at 150 and 200 °C which is significantly higher than that (30 GPa%) required for third generation advanced high-strength steels. The thermal stability of the retained austenite was low, because the low stacking fault energy promotes the ε-martensitic transformation. The mechanical stability of the retained austenite, however, increased with an increase in the deformation temperature of the steel, because the ε-martensitic and the strain-induced αâ²-martensitic transformations were suppressed with increasing deformation temperature. Therefore, the high value of the TS à TEl of the steel subjected to warm deformation is principally associated with the high volume fraction of the retained austenite and its optimum metastability which maximizes the TRIP effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 688, 14 March 2017, Pages 237-243
Journal: Materials Science and Engineering: A - Volume 688, 14 March 2017, Pages 237-243
نویسندگان
Koh-ichi Sugimoto, Hikaru Tanino, Junya Kobayashi,