کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1581206 1514855 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diffusion-controlled true grain-boundary sliding in nanostructured metals and alloys
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Diffusion-controlled true grain-boundary sliding in nanostructured metals and alloys
چکیده انگلیسی

Based on the study of grain-boundary internal friction, it has been demonstrated that the temperatures of onset and intensive development of true grain-boundary sliding (grain-boundary microsliding) as well as the activation energy of this process in submicrocrystalline and nanocrystalline metals and alloys with imperfect grain boundaries relative to coarse-grained ones with perfect grain boundaries decrease. For all grain structures studied the activation energy of grain-boundary internal friction is found to exceed the respective one for grain-boundary diffusion but to be lower than the activation energy of bulk diffusion. The diffusion-controlled mechanism of true grain-boundary sliding is validated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 503, Issues 1–2, 15 March 2009, Pages 58–61
نویسندگان
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