کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620854 988703 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Atomic motion during the migration of general [0 0 1] tilt grain boundaries in Ni
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Atomic motion during the migration of general [0 0 1] tilt grain boundaries in Ni
چکیده انگلیسی
We generalize a previous study of the atomic motions governing grain boundary migration to consider arbitrary misorientations of [0 0 1] tilt boundaries. Our examination of the nature of atomic motions employed three statistical measures of atomic motion: the non-Gaussian parameter, the “dynamic entropy” and the van Hove correlation function. These metrics were previously shown to provide a useful characterization of atomic motions both in glass-forming liquids and strained polycrystalline materials. As before, we find highly cooperative, string-like motion of atoms, but the grain boundary migration itself is a longer timescale process in which atoms move across the grain boundary. These observations are consistent with our previous results for Σ5 [0 0 1] tilt boundaries. It is evident from our work that the grain boundary structure and misorientation have a significant influence on the rate of grain boundary migration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 13, August 2007, Pages 4527-4533
نویسندگان
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