کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9796071 1514941 2005 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-planar dislocations: 3D models and thermally-activated glide processes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Non-planar dislocations: 3D models and thermally-activated glide processes
چکیده انگلیسی
In recent years, there has been a renewed interest in studying the cross-slip of screw dislocations in the simple face-centred cubic (FCC) structure. This paper serves to address parallel developments in modelling the cross-slip of screw dislocations in the body-centred cubic (BCC) structure and the ordered L12 structure. In the latter two cases, the dislocation cores have non-planar spreading offering high intrinsic Peierls stresses. The flow behaviours of these materials, such as the non-Schmid behaviour and temperature-dependence of flow stress, are largely due to the behaviours of single dislocations. 3D atomistic modelling of the minimum-energy path for the glide processes in these cases is performed with an aim to reconcile with experimentally determined activation energies for slip.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 400–401, 25 July 2005, Pages 25-36
نویسندگان
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