کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1575310 | 1514740 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stability of retained austenite in multi-phase microstructure during austempering and its effect on the ductility of a low carbon steel
ترجمه فارسی عنوان
پایداری آستنیت حفظ شده در میکروسیستم چند فاز در طول اتمسفر و اثر آن بر ورق فولاد کم
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The contribution of multi-phase microstructure and retained austenite on mechanical properties of austempered and intercritical annealed Fe-0.23C-1.8Mn-1.35Si (wt%) steel was studied. The multi-phase microstructure comprised of intercritical ferrite (IF), bainite/martensite, and retained austenite. During austempering, the retained austenite was stabilized, which was studied using a combination of experimental (XRD, TEM) and thermodynamic analysis. The termination of bainitic transformation combined with carbon rejection into residual austenite during the second step austempering treatment is believed to be the underlying basis for stabilization of retained austenite. This led to significant increase in uniform and total elongation (25% and 36%, respectively) and the product of tensile strength and % elongation was 33Â GPa%. The work hardening behavior of retained austenite exhibited a three-stage process such that necking was delayed. The increased work hardening rate is attributed to the multi-phase microstructure and TRIP effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 603, 6 May 2014, Pages 69-75
Journal: Materials Science and Engineering: A - Volume 603, 6 May 2014, Pages 69-75
نویسندگان
Z.J. Xie, Y.Q. Ren, W.H. Zhou, J.R. Yang, C.J. Shang, R.D.K. Misra,