کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7968965 1514344 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-resolution characterization of the martensite-austenite constituent in a carbide-free bainitic steel
ترجمه فارسی عنوان
مشخصه های با وضوح بالا از ترکیب مارتنزیت و آستنیت در فولاد باینیتی بدون کاربید
کلمات کلیدی
باینیت بدون کاربید، مشتمل بر مشتقات مشتق از آستنیت، میکروسکوپ الکترونی انتقال، توموگرافی پروب اتم مدولاسیون ساختاری،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The multiphase microstructure of carbide-free bainitic steels comprises bainitic ferrite laths, retained austenite with different morphologies, a minor fraction of carbides and so-called martensite-austenite areas, which partially transform during the last cooling step. While the other constituent received much attention, little is known about the structure of the martensite-austenite constituent in carbide-free bainitic steels. Thus, in this study, it was structurally and chemically investigated by high-resolution techniques such as transmission electron microscopy and atom probe tomography after preceded unambiguous identification by electron backscatter diffraction in conventional as well as transmission mode. The results, ranging from carbon segregation to cementite precipitation in the martensitic part, indicate strong auto-tempering during final cooling which is followed by aging. Also, some kind of structural modulation in the austenite belonging to the martensite-austenite areas was observed. Atom probe tomography revealed a heterogeneous carbon distribution, further supporting the findings by transmission electron microscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 144, October 2018, Pages 182-190
نویسندگان
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