On the hardness of shear bands in amorphous alloys

The nanoindentation hardness of individual shear bands in a Zr-based metallic glass was investigated in order to obtain a better understanding of how shear band plasticity is influenced by non-crystalline defects. The results clearly showed that the shear band hardness in both as-cast and structural...

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Bibliographic Details
Published in:Scripta materialia 2009-11, Vol.61 (10), p.951-954
Main Authors: Yoo, Byung-Gil, Kim, Yong-Jae, Oh, Jun-Hak, Ramamurty, U., Jang, Jae-il
Format: Article
Language:English
Subjects:
Bulk metallic glasses
Hardness
Nanoindentation
Shear bands
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Summary:The nanoindentation hardness of individual shear bands in a Zr-based metallic glass was investigated in order to obtain a better understanding of how shear band plasticity is influenced by non-crystalline defects. The results clearly showed that the shear band hardness in both as-cast and structurally relaxed samples is much lower than the respective hardness of undeformed region. Interestingly, inter-band matrix also exhibited lower hardness than undeformed region. The results are discussed in terms of the influence of structural state and the prevailing mechanism of plastic deformation.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2009.07.037