کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9796102 | 1514941 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bridging steady-state deformation behavior at low and high temperature by considering dislocation dipole annihilation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
For single phase metals, both the stress exponent n and activation energy Q of stationary deformation significantly change from low to high deformation temperature. This paper illustrates a recently developed model of dislocation density evolution, which is able to explain that transition. Important model components in this respect are the consideration of dislocation dipoles (represented as distribution of dipole heights) as well as of dislocation annihilation mechanisms of different kinetics: glide-induced dislocation-dislocation reactions and climb of edge dipole constituents. The model exhibits a transition with decreasing temperature from dislocation climb to glide as the decisive annihilation kinetics, which in turn is reflected in the steady-state deformation behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 400â401, 25 July 2005, Pages 175-181
Journal: Materials Science and Engineering: A - Volumes 400â401, 25 July 2005, Pages 175-181
نویسندگان
P. Eisenlohr, W. Blum,