کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448893 988686 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Orientation stability in equal channel angular extrusion. Part I: Face-centered cubic and body-centered cubic materials
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Orientation stability in equal channel angular extrusion. Part I: Face-centered cubic and body-centered cubic materials
چکیده انگلیسی

Stability of crystallographic orientations is a key aspect in the characterization and understanding of texture evolution during plastic deformation. In this study, a rate-dependent crystal plasticity model was applied to investigate orientation stability during equal channel angular extrusion (ECAE) of face-centered cubic (fcc) and body-centered cubic (bcc) crystals. The stability of experimentally observed ideal orientations was examined according to lattice rotation fields computed at and around the orientations. It is shown that these ideal orientations are meta-stable under rate-sensitive conditions, and their stability generally increases with the decrease of strain rate sensitivity. The results also reveal a well-preserved duality in the lattice rotation and orientation stability between the two types of crystal structure. The stability results simulated at low strain rate sensitivities agree well with the experimental observations in one-pass ECAE of Al and Cu single crystals. In Part II of the paper, this analysis is extended to hexagonal materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 5, March 2008, Pages 1018–1030
نویسندگان
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