کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455672 1514645 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructural evolution and deformation mechanism of a Fe-15Mn alloy investigated by electron back-scattered diffraction and transmission electron microscopy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructural evolution and deformation mechanism of a Fe-15Mn alloy investigated by electron back-scattered diffraction and transmission electron microscopy
چکیده انگلیسی

The present studies focus on mechanical properties and microstructure evolution of a Fe-15Mn dual phase alloy during tensile deformation based on the analyses of X-ray diffraction, electron back-scattered diffraction and transmission electron microscopy. The alloy possesses excellent combination of strength and ductility (UTS×TEL=32 GPa
- %) and good strain hardening capacity owing to several plastic deformation mechanisms. At earlier stage of tensile deformation, the deformation induced transformation from γ to ε is the main plastic deformation mechanism. In addition, the deformation induced twins within ε-martensite and transformation from ε to αˊ also have contributions to the plastic deformation. With further increasing the strain, the deformation induced transformation from ε→αˊ in combination with the dislocation slip in γ, ε and αˊ become the main plastic deformation mechanisms. During the whole tensile deformation, nearly all αˊ-martensite grains exist within ε-martensite plates, indicating that the deformation induced transformation sequence is ε→αˊ. Moreover, it has been demonstrated that the αˊ-martensite is preferred to nucleate at intersections of two ε-martensite plates, interfaces of γ/ε and ε/ε and low angle grain boundaries within ε-martensite plates. Note that the orientations of some αˊ-martensite grains existing within the same ɛ-martensite plate are not exactly the same.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 698, 20 June 2017, Pages 198-205
نویسندگان
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