کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450625 988740 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Initiation of shear bands near a stress concentration in metallic glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Initiation of shear bands near a stress concentration in metallic glass
چکیده انگلیسی

Instrumented contact experiments are performed on three metallic glasses to systematically study shear band formation near a stress concentration. The results suggest that high local stresses at a point in the glass are insufficient to initiate a shear band. Rather, the yield strength must be exceeded along the entire length of a viable shear path in order for a shear band to form. Because of this, conventional analyses to extract shear yield stresses from Hertzian contact experiments overestimate the glass strength by a factor of three or more. In contrast, the interpretation of shear band initiation as yield on a plane agrees with recent experimental observations on metallic glasses that pertain to the slip-line field, and can rationalize the experimental contact load measurements as well as the shear band path.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 55, Issue 16, September 2007, Pages 5348–5358
نویسندگان
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