کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7981016 | 1514732 | 2014 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Collective behavior of strain-induced martensitic transformation (SIMT) in biomedical Co-Cr-Mo-N alloy polycrystal: An ex-situ electron backscattering diffraction study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Collective behavior of strain induced martensitic transformation (SIMT) in biomedical Co-Cr-Mo-N alloy polycrystal has been investigated by ex-situ electron backscattering diffraction (EBSD) analysis during tensile deformation. The formation of SIMTed ε-hcp phase depends on the crystal orientation, and the SIMT behavior is basically understood by the motion of isolated Shockley partial dislocation associated with the negative stacking fault energy (SFE) of this alloy. However, their variant selection is not governed by Schmid׳s law. Most of SIMT occurred in grains with loading axes near and between ã1 1 1ã and ã0 1 1ã directions because of the low effective SFE, which is determined by the difference in the Schmid factors for leading and trailing Shockley partial dislocations. In grains with loading axes near the ã0 0 1ã direction, the SIMT did not occur due to the high value of the effective SFE. These findings are very important to improve the strength and wear resistance of this alloy without sacrificing the ductility by controlling the crystal texture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 611, 12 August 2014, Pages 263-273
Journal: Materials Science and Engineering: A - Volume 611, 12 August 2014, Pages 263-273
نویسندگان
Byoung-Soo Lee, Yuichiro Koizumi, Hiroaki Matsumoto, Akihiko Chiba,