Fracture mechanisms in bulk metallic glassy materials.
Fracture mechanisms in bulk metallic glassy materials.
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DOI：
10.1103/physrevlett.91.045505
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发表时间：
2003-07
影响因子：
8.6
通讯作者：
Z. Zhang;G. He;J. Eckert;L. Schultz
中科院分区：
文献类型：
--
作者：
Z. Zhang;G. He;J. Eckert;L. Schultz
研究发现，大块金属玻璃材料的破坏遵循三种模式，即断裂面与加载方向明显偏离45度的剪切断裂、垂直于加载方向的法向拉伸断裂和平行于加载方向的断裂或劈裂断裂。实际发生的破坏类型在很大程度上取决于施加的加载模式和材料的微观结构。大量证据表明，Tresca断裂准则是无效的，并且首次针对先进的bmg或新开发的块状纳米结构材料等具有高强度的各向同性材料建立了三个断裂准则。
We find that the failure of bulk metallic glassy (BMG) materials follows three modes, i.e., shear fracture with a fracture plane significantly deviating from 45 degrees to the loading direction, normal tensile fracture with a fracture plane perpendicular to the loading direction, or distensile fracture in a break or splitting mode with a fracture plane parallel to the loading direction. The actually occurring type of failure strongly depends on the applied loading mode and the microstructure of the material. Extensive evidence indicates that the Tresca fracture criterion is invalid, and for the first time, three fracture criteria are developed for isotropic materials with high strength, such as advanced BMGs or the newly developed bulk nanostructural materials.