کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1498713 993275 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Small-scale plasticity: Insights into dislocation avalanche velocities
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Small-scale plasticity: Insights into dislocation avalanche velocities
چکیده انگلیسی

We report direct measurements of displacement jump velocities in deforming nano- and microcrystals. These velocities exhibit large scatter and no correlation with plastic strain, crystal size or applied stress. Statistical analysis for the displacement jump velocities shows a cubic power-law decay, with a shoulder at low velocities. Our results indicate that the collective motion of dislocations in the deforming crystals is dominated by statistical fluctuations within the internal stresses, rather than by a mobility law that depends on the externally applied stress.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scripta Materialia - Volume 69, Issue 8, October 2013, Pages 586–589
نویسندگان
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