کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620633 | 988645 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Intrinsic shear strength of metallic glass
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The intrinsic (ideal) strength has been extensively studied for crystalline alloys, but remains largely unsettled for metallic glasses. This study, by combining computer simulations and the cooperative shear model (Johnson and Samwer, 2005 [12]), found that, at the athermal limit, the yield strain of metallic glass can be as high as â¼10% in pure shear, and the corresponding ideal shear strength is G/10 (where G is the shear modulus), at which shear bands nucleate homogeneously in the metallic glass. The athermal extrapolation of the measured strength in conventional loading tests is much lower, owing to the unavoidable imperfections in realistic samples, where shear band nucleation is always heterogeneous and facilitated by stress concentrators. The two scenarios have different temperature dependence and merge at elevated temperatures, when the mode of yielding eventually changes from strain localization to homogeneous flow.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 59, Issue 4, February 2011, Pages 1800-1807
Journal: Acta Materialia - Volume 59, Issue 4, February 2011, Pages 1800-1807
نویسندگان
Y.Q. Cheng, E. Ma,