Shear fracture and fragmentation mechanisms of bulk metallic glasses
Shear fracture and fragmentation mechanisms of bulk metallic glasses
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DOI：
10.1080/09500830600949602
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发表时间：
2006-10
影响因子：
1.2
通讯作者：
Z. Zhang;H. Zhang;B. Shen;A. Inoue;J. Eckert
中科院分区：
文献类型：
--
作者：
Z. Zhang;H. Zhang;B. Shen;A. Inoue;J. Eckert
在压缩载荷下，锆基和钴基大块金属玻璃表现出完全不同的破坏模式。锆基非晶以纯剪切方式失效，而钴基非晶以细小颗粒或粉末状破碎，呈现碎裂模式。两种非晶合金断裂模式的差异表明，不同的断裂机制控制着断裂过程，可用表面能γ、解理强度σ0、破碎系数FN和断裂模式因子α=τ0/σ0的综合效应来描述。
Zr- and Co-based bulk metallic glasses display completely different failure modes under compressive loading. Zr-based metallic glasses always fail in a pure shear mode, whereas Co-based metallic glasses often break into small particles or powder, exhibiting a fragmentation mode. The difference in the failure modes for the two glassy alloys indicates that different mechanisms control the fracture processes, which can be described by a combined effect of surface energy γ, cleavage strength σ0, fragmentation coefficient Fn and fracture mode factor α = τ0/σ0.