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Propagation of shear bands in a Cu47.5Zr47.5Al5 bulk metallic glass

  • K.B. Kim (a1), J. Das (a2), M.H. Lee (a2), S. Yi (a3), E. Fleury (a4), Z.F. Zhang (a5), W.H. Wang (a6) and J. Eckert (a2)...

Abstract

We report a novel finding of slither propagation of shear bands on the fracture surface of a Cu47.5Zr47.5Al5 bulk metallic glass (BMG). The nanoscale heterogeneities in the as-cast state are aggregated along shear bands with irregular morphology. Such heterogeneities create a fluctuating stress field during shear band propagation leading to a slither propagation mode. The slither propagation of 10 to 15 nm wide shear bands is effective to improve both the plasticity and the “work-hardening-like” behavior of BMGs if the size, the morphology, and the elastic properties of the heterogeneities are intimately intercalated during solidification.

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a)Address all correspondence to this author. e-mail: kbkim@sejong.ac.kr

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Keywords

Propagation of shear bands in a Cu47.5Zr47.5Al5 bulk metallic glass

  • K.B. Kim (a1), J. Das (a2), M.H. Lee (a2), S. Yi (a3), E. Fleury (a4), Z.F. Zhang (a5), W.H. Wang (a6) and J. Eckert (a2)...

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