کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8004289 | 1516582 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of pre-existing shear bands on mechanical properties and serration behaviors in bulk metallic glasses
ترجمه فارسی عنوان
تاثیر نوارهای برشی پیش سازه بر خواص مکانیکی و رفتارهای رسوب در عینک های فلزی بزرگ
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کلمات کلیدی
شیشه فلزی بزرگ، باند برشی، سرگذشت، شکل پذیری، قبل از تغییر شکل،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
Pre-existing (multiple) shear bands were introduced into the ductile Zr36 Co28 Al16 and Zr65 Ni16 Cu15 Al10 bulk metallic glasses (BMGs) through the lateral-deformation, respectively. It was found that the pre-exiting shear bands can further enhance the compressive plasticity of ductile BMGs. According to the serration analysis on the plastic deformation of the as-cast and the pre-deformed samples, the serration events in the stress-strain curves during deformation display a self-organized critical (SOC) behavior. Compared with the as-cast BMGs, a larger power-law scaling exponent calculated based on serrated flow behaviors becomes larger for the pre-deformed BMGs, implying that the shear banding stability of BMGs is effectively enhanced. This should be caused by the pronounced interactions of shear bands during plastic deformation for the pre-deformed BMGs. However, by introducing a large amount of multiple shear bands into the glassy matrix, it also becomes easier for shear bands to propagate along the pre-existing shear bands, leading to a lower cut-off elastic energy density for the pre-deformed BMGs. More multiple shear bands with stronger interactions for the pre-deformed BMGs could provide a larger chance to activate the shear-band cracking but less local elastic energies are remained for the subsequent crack-linking.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Iron and Steel Research, International - Volume 24, Issue 4, April 2017, Pages 402-410
Journal: Journal of Iron and Steel Research, International - Volume 24, Issue 4, April 2017, Pages 402-410
نویسندگان
Xu-dong Yuan, Sheng-hai Wang, Kai-kai Song, Xiao-liang Han, Yu-sheng Qin, Dong-fang Li, Xue-lian Li, Bo Song, Hui Xing, Li Wang,