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 [0Â 0Â 1] tilt grain boundaries in Ni
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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![عکس صفحه اول مقاله: Atomic motion during the migration of general [0Â 0Â 1] tilt grain boundaries in Ni Atomic motion during the migration of general [0Â 0Â 1] tilt grain boundaries in Ni](/preview/png/10620854.png)
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
Journal: Acta Materialia - Volume 55, Issue 13, August 2007, Pages 4527-4533
نویسندگان
Hao Zhang, David J. Srolovitz, Jack F. Douglas, James A. Warren,