Shear band formation and ductility in bulk metallic glass
Shear band formation and ductility in bulk metallic glass
复制标题
DOI：
10.1080/14786430500154059
复制
发表时间：
2005-08
影响因子：
1.6
通讯作者：
A. Sergueeva;N. Mara;J. Kuntz;E. Lavernia;A. K. Mukherjee *
中科院分区：
文献类型：
--
作者：
A. Sergueeva;N. Mara;J. Kuntz;E. Lavernia;A. K. Mukherjee *
在文献中报道的金属玻璃的化学组成的变化，以及整体缺乏关于金属玻璃的不均匀变形行为的实验数据，使得难以评估剪切带/断裂行为对金属玻璃的机械性能的影响。分离局部剪切带形成对整体非均匀流的影响似乎是处理这个问题的第一步。研究了Vitreloy金属玻璃在室温和不同应变率下的拉伸和压缩力学行为。在高应变速率下观察到多个剪切带的形成。应变速率的增加导致拉伸和压缩的延展性增强。讨论了拉伸和压缩变形过程的某些方面。
The variations in the chemical compositions of the metallic glasses reported in the literature, as well as the overall lack of experimental data concerning the inhomogeneous deformation behaviour of metallic glass, make the evaluation of the effects of shear band/fracture behaviour on the mechanical properties of metallic glasses difficult. Isolating the effect of local shear band formation on bulk inhomogeneous flow would appear to be a first step in approaching this problem. The mechanical behaviour of Vitreloy metallic glass at room temperature and at various strain rates in tension and compression was investigated. The formation of multiple shear bands was observed at high strain rates. An increase in strain rate leads to enhanced ductility in tension and compression. Some aspects of the deformation processes in tension and compression are discussed.