Effect of aspect ratio on the compressive deformation and fracture behaviour of Zr-based bulk metallic glass

Abstract

The compressive deformation and fracture features of Zr₅₉Cu₂₀Al₁₀Ni₈Ti₃ bulk metallic glassy samples with aspect ratios in the range of 0.67–2.00 have been investigated. The compressive plastic strain of the glass monotonically increases with decreasing aspect ratio, but the maximum strength almost maintains a constant value of 1.77–1.88 GPa. All the compressive shear-band angles are equal to ∼40° if modified by the rotation of the primary shear bands.

Acknowledgements

The authors would like to thank H. Grahl and H. Schulze for sample preparation, and G. Yao, J. L. Wen, H. H. Su and W. Gao for mechanical tests and the SEM observations. This work was supported by the National Natural Science Funds of China (NSFC) under grant Nos. 50401019 and 50323009, the ‘Hundred of Talents Project’ by the Chinese Academy of Sciences and the EU within the framework of the RTN-network on ductile BMG composites (MRTN-CT-2003-504692). One of the authors (Z. F. Zhang) is also with the Multi-Component Amorphous and Nanocrystalline Systems (MANS) Research Team funded by the Chinese Academy of Sciences.