کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1788512 | 1524162 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The role of dislocations in cyclically deformed metal polycrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Persistent slip bands (PSBs) are surface microstructural features that commonly arise when a polycrystalline metal experiences mechanical fatigue. As dislocations are carriers of plastic strain and PSBs are essentially strain localisation regions, the evolution of dislocations is expected to be pivotal in determining a material's fatigue behaviour. The role of dislocations is investigated here by considering their kinematic activities namely, dislocation generation, annihilation and trapping incorporated within crystal plasticity theory. The results are consistent with experimental observations reported in the literature, indicating that PSB formation is due to the accumulation of edge dislocation dipoles caused by trapping events.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 8, Issues 3â4, May 2008, Pages 436-439
Journal: Current Applied Physics - Volume 8, Issues 3â4, May 2008, Pages 436-439
نویسندگان
Ke-Shen Cheong,