The fracture of bulk metallic glasses
The fracture of bulk metallic glasses
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DOI：
10.1016/j.pmatsci.2015.05.002
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发表时间：
2015-10
影响因子：
37.4
通讯作者：
B. Sun;Weihua Wang
中科院分区：
文献类型：
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作者：
B. Sun;Weihua Wang
直到最近，金属玻璃的断裂才受到相对较少的关注。块体金属玻璃（BMG）的发展为研究玻璃材料的断裂提供了一系列理想的模型体系，其成分丰富，样品尺寸大，断裂行为多样。不同BMG的断裂韧性从接近理想脆性到已知的最高损伤容限变化显著。在不同的BMG中观察到不同的断口形貌、断裂模式和裂纹的动态扩展。在这篇综述论文中，我们提出了一个全面的看法，国家的最先进的研究各方面的断裂，包括断裂行为和特点，断裂模式，断裂准则，断裂韧性，和断口形貌。介绍了BMG断裂的实验数据，并讨论了它们与连续断裂力学和原子尺度过程的可能理论联系。通过各种计算方法的BMG断裂的建模研究进行了综述。本文还提出了一些观点，包括BMG断裂研究与其他课题的关系，以及未来研究中尚未解决的问题。
The fracture of metallic glasses has received relatively little attention until recently. The development of bulk metallic glasses (BMGs) with more compositions, large sample sizes and diverse fracture behaviors provides a series of ideal model systems for the study of fracture in glassy materials. The fracture toughness of different BMGs varies significantly from approaching ideally brittle to the highest known damage tolerance. Diverse fracture patterns on the fracture surface, fracture modes and dynamic propagation of cracks have been observed in different BMGs. In this review paper, we present a comprehensive view of the state-of-the-art research on various aspects of the fracture of BMGs, including fracture behavior and characteristics, fracture mode, fracture criterion, fracture toughness, and fracture morphology. Accumulated experimental data on BMG fracture are presented and their possible theoretical connections with continuum fracture mechanics and the atomic-scale process are introduced and discussed. Modeling studies of the fracture of BMGs by various computational methods are also reviewed. The review also presents a number of perspectives, including the relation of BMG fracture study to other topics, and unsolved issues for future investigation.