کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620233 988604 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface morphologies due to grooves at moving grain boundaries having stress-driven fluxes
ترجمه فارسی عنوان
مورفولوژی سطحی به علت شیارها در مرزهای دانه متحرک که دارای جریان استرس است
کلمات کلیدی
حرکت شیار مرز دانه، شار مرز دانه، شیار فشار دادن، فشار،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
We modify a previous steady-state description developed by Gènin [J. Appl. Phys. 77, 5130-5137 (1995)] for a grain boundary groove moving with a prescribed speed in a material subject to in-plane stress and a resultant grain boundary flux. The arbitrary assumption that the grain boundary flux is equally delivered to (or extracted from) the two adjacent free surfaces of the grains is replaced by a condition that requires continuity of surface chemical potentials at the grain boundary. Analytical results for the small-slope approximation as well as nonlinear results for large slopes are computed numerically for steady-state motion at a specified groove speed. We apply these results to a “partial loop” grain boundary geometry that moves by mean curvature induced by the groove conditions. In contrast to the ordinary effect that a grain boundary surface groove retards grain boundary motion, the presence of a compressive stress and resultant grain boundary flux toward the free surface can promote grain boundary motion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 19, November 2013, Pages 7216-7226
نویسندگان
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