کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7979731 1514726 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture morphology pattern transition dominated by the crack tip curvature radius in brittle metallic glasses
ترجمه فارسی عنوان
تغییر شکل الگوی شکستگی توسط شعاع انحنای کرک انحنای شکاف در عینک های شکننده فلزی تحت تاثیر قرار می گیرد
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The dynamic evolutions of different fracture morphologies in the fracture surface of brittle Mg-based metallic glasses (MGs) were systematically and quantitatively studied by SEM and AFM. It shows that the evolution of the fracture morphology pattern is dominated by an effective dynamic parameter of critical crack tip curvature radius. Based on crack tip plastic zone and shear transformation zone (STZ) theories, a theoretical model for the evolution of the crack tip curvature radius by considering the activation of STZs during fracture was proposed. The model can simulate the crack propagation process, and predict the critical crack tip curvature radius and the fracture pattern transition between the dimples and the periodic corrugations solely occurring in brittle MGs. These results have implications for understanding the microscopic fracture mechanism and the structural origin of fracture in MGs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 617, 3 November 2014, Pages 89-96
نویسندگان
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