Shear Banding Analyses of Amorphous Alloys with Crystalline Particles
Shear Banding Analyses of Amorphous Alloys with Crystalline Particles
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DOI：
10.4028/www.scientific.net/msf.561-565.1323
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发表时间：
2007-10
期刊：
影响因子：
--
通讯作者：
Y. Shibutani;J. Park;M. Wakeda
中科院分区：
文献类型：
--
作者：
Y. Shibutani;J. Park;M. Wakeda
采用分子动力学模拟方法，分析了嵌入纳米晶的二元(铜、锆)非晶合金在单轴拉伸和压缩条件下的塑性变形性能。以纳米晶的数量和尺寸为研究参数。纳米晶的数量影响缺陷的分布，即剪切带形核，从而改变应力-应变曲线，而纳米晶的尺寸对响应没有显著影响。正如实验工作中已经报道的那样，在剪切带或晶相和非晶相之间的界面上，在拉伸下发现了结合空洞。这表明，应高度重视颗粒周围的界面强度。
Plastic deformability of the binary (copper and zirconium) amorphous alloy with embedded nanosized crystals under uniaxial tension and compression is analyzed using molecular dynamics simulations. The number and the size of the nanocrystals are taken as the study parameters. The number of nanocrystals affects the distribution of defects, that is, shear bands nucleation and thus changes the stress-strain curve, whereas the size of the nanocrystals does not significantly influence the response. As already reported in the experimental works, coalescent voids are found under tension in the shear bands or at the interface between crystalline and amorphous phases. This suggests that much attention should be paid to the interface strength around the particles.