کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7971607 1514609 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure characterization and mechanical behavior analysis in a high strength steel with different proportions of constituent phases
ترجمه فارسی عنوان
خصوصیات میکرو سازه و تحلیل رفتار مکانیکی در یک فولاد با استحکام بالا با نسبت های مختلف فازهای تشکیل دهنده
کلمات کلیدی
برگزاری باینیت ایزوترمال، خنک سازی و پارتیشن بندی، احتباس آستنیت، فازهای تشکیل دهنده، رفتار مکانیکی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
A high strength steel with Nb-V-Ti addition was heat treated by a series of isothermal bainite holding (IBH) processes and quenching and partitioning (Q&P) processes with different intercritical annealing temperatures. The microstructure observation showed that some martensite was formed during quenching in IBH condition with annealing temperature above 850 °C, mainly ascribed to heterogeneous carbon content distribution in parent austenite with relatively large size. Meanwhile, film-like RA in martensite, relatively coarser lath-like RA in bainite and blocky RA located in grain boundaries or phase boundaries were observed in both IBH and Q&P treatments. Moreover, Q&P process was proved to be more beneficial to retain austenite than IBH process, while the ability of austenite retention was similar in IBH conditions. An excellent combination of strength and ductility was obtained in Q&P process annealed at 880 °C with tensile strength of 1126 MPa and total elongation of ~ 18%, attributing to TRIP effect mainly occurred in the latter part of strain and fine microstructure with homogeneous distribution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 734, 12 September 2018, Pages 398-407
نویسندگان
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