کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448251 988668 2010 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterizing short-range vs. long-range spatial correlations in dislocation distributions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Characterizing short-range vs. long-range spatial correlations in dislocation distributions
چکیده انگلیسی

Hard X-ray diffraction experiments have provided evidence of a strongly heterogeneous distribution of dislocation densities along the axis of cylindrical ice single crystals oriented for basal slip in torsion creep. The dislocation arrangements showed a complex scale-invariant character, which was analyzed by means of statistical and multifractal techniques. A trend to decreasing autocorrelation of the dislocation distribution was observed as deformation proceeds. At low strain levels, long-range spatial correlations control the distribution, but short-range correlations in relation with cross-slip progressively prevail when strain increases. This trend was reproduced by a model based on field dislocation dynamics, a theory accounting for both long-range elastic interactions and short-range interactions through transport of dislocation densities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 58, Issue 5, March 2010, Pages 1837–1849
نویسندگان
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