Periodic corrugation on dynamic fracture surface in brittle bulk metallic glass
Periodic corrugation on dynamic fracture surface in brittle bulk metallic glass
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DOI：
10.1063/1.2374688
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发表时间：
2006-10
影响因子：
4
通讯作者：
X. Xi;D. Q. Zhao;M. Pan;Weihua Wang;Y. Wu;J. Lewandowski
中科院分区：
文献类型：
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作者：
X. Xi;D. Q. Zhao;M. Pan;Weihua Wang;Y. Wu;J. Lewandowski
研究了脆性块体金属玻璃（BMG）中裂纹的动态扩展。与其他脆性玻璃材料相反，作者发现了纳米尺度的出平面周期性波纹沿着裂纹表面的BMG。在不同的加载速率下，纳米尺度的周期性几乎保持不变。提出了一种解释解释的演变和周期性的合并的纳米尺度的孔洞沿着裂纹表面。这一观察结果揭示了脆性材料动态断裂表面粗糙化的起源，并可普遍适用于脆性材料。
Dynamic crack propagation in a model brittle bulk metallic glass (BMG) is studied. Contrary to other brittle glassy materials, the authors find nanometer scale out-of-plane periodic corrugations along the crack surface of the BMG. The nanoscale periodicity remains nearly constant at different loading rates. An interpretation is presented to explain the evolution and the periodic coalescence of the nanometer scale cavities along the crack surface. The observation sheds light on the origin of dynamic fracture surface roughening in brittle materials and could be generally applicable to brittle materials.