کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455672 | 1514645 | 2017 | 8 صفحه PDF | دانلود رایگان |
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 (UTSÃTEL=32Â 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 Î±Ë also have contributions to the plastic deformation. With further increasing the strain, the deformation induced transformation from εâÎ±Ë in combination with the dislocation slip in γ, ε and Î±Ë become the main plastic deformation mechanisms. During the whole tensile deformation, nearly all αË-martensite grains exist within ε-martensite plates, indicating that the deformation induced transformation sequence is εâαË. Moreover, it has been demonstrated that the αË-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 αË-martensite grains existing within the same É-martensite plate are not exactly the same.
Journal: Materials Science and Engineering: A - Volume 698, 20 June 2017, Pages 198-205