کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786265 1465637 2012 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Banding in single crystals during plastic deformation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Banding in single crystals during plastic deformation
چکیده انگلیسی

A rigid-plastic rate-independent crystal plasticity model capable of capturing banding in single crystals subjected to homogeneous macroscopic deformation is proposed. This model treats the single crystal as a ‘stack of domains’. Individual domains deform homogeneously while maintaining velocity and traction continuity with their neighbors. All the domains collectively accommodate the imposed deformation. The model predicts lattice orientation evolution, slip distribution, strain localization and band orientation in copper single crystals with imposed plane strain deformation. In quantitative agreement with experimental observations reported in the literature, macroscopic shear banding and regular deformation banding are predicted in initially copper and rotated cube oriented single crystals, respectively, while banding is not predicted in initially Goss oriented single crystals. The model does not, however, predict the experimentally observed orientation of smaller scale dislocation boundaries such as dense dislocation walls.


► Computationally efficient model capable of predicting banding in single crystals is proposed.
► A novel method for incorporating microstructural information into the continuum model is introduced.
► Model banding predictions agree well with experimental observations reported in the literature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 36, September 2012, Pages 15–33
نویسندگان
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