کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7983913 | 1514783 | 2013 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional crack initiation mechanisms in bcc-Fe under loading modes I, II and III
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We present quasicontinuum simulations of three-dimensional (3D) edge cracks in single crystal bcc-Fe. Crystals with different thicknesses and crystallographic orientations have been investigated and loaded in modes I, II and III. We study incipient plasticity at the crack tip and the onset of crack propagation, and calculate the critical stress intensity factors for crack propagation and dislocation emission. The active slip systems and the character of attendant dislocations have been identified and compared with the standard 2D behavior. We find that the observed type of propagation depends on the loading mode and crystallographic orientation. Mechanisms comprise twinning, bccâfcc phase transformation, void formation and dislocation emission.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 560, 10 January 2013, Pages 306-314
Journal: Materials Science and Engineering: A - Volume 560, 10 January 2013, Pages 306-314
نویسندگان
Inga Ringdalen Vatne, Alexander Stukowski, Christian Thaulow, Erling Ãstby, Jaime Marian,