کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620326 988610 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling size effects on fatigue life of a zirconium-based bulk metallic glass under bending
ترجمه فارسی عنوان
اثرات اندازه مدل سازی بر روی خستگی شیشه های فلزی بزرگ بر پایه زیرکونیوم تحت خم شدن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
A size effect on the fatigue-life cycles of a Zr50Cu30Al10Ni10 (at.%) bulk metallic glass has been observed in the four-point-bending fatigue experiment. Under the same bending-stress condition, large-sized samples tend to exhibit longer fatigue lives than small-sized samples. This size effect on the fatigue life cannot be satisfactorily explained by the flaw-based Weibull theories. Based on the experimental results, this study explores possible approaches to modeling the size effects on the bending-fatigue life of bulk metallic glasses, and proposes two fatigue-life models based on the Weibull distribution. The first model assumes, empirically, log-linear effects of the sample thickness on the Weibull parameters. The second model incorporates the mechanistic knowledge of the fatigue behavior of metallic glasses, and assumes that the shear-band density, instead of the flaw density, has significant influence on the bending fatigue-life cycles. Promising predictive results provide evidence of the potential validity of the models and their assumptions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 1, January 2013, Pages 273-279
نویسندگان
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