The influence of glass transition temperature on the critical size for deformation mode transition in metallic glassy films

The size effect on the bending deformation behaviour of magnetron-sputtered La57Al25Co18, Cu50Zr50 and Fe70Y8B22 glassy films was investigated. The transition of the deformation mode from highly localized to non-localized occurs as the film thickness reduces below the critical value, which does not...

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Bibliographic Details
Published in:Scripta materialia 2014-04, Vol.77, p.64-67
Main Authors: Cao, Q.P., Wang, C., Bu, K.J., Liu, S.Y., Wang, X.D., Zhang, D.X., Jiang, J.Z.
Format: Article
Language:English
Subjects:
Deformation mode transition
Glass transition temperature
Metallic glassy film
Poisson’s ratio
Size effect
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Summary:The size effect on the bending deformation behaviour of magnetron-sputtered La57Al25Co18, Cu50Zr50 and Fe70Y8B22 glassy films was investigated. The transition of the deformation mode from highly localized to non-localized occurs as the film thickness reduces below the critical value, which does not exhibit a distinct dependence on Poisson’s ratio. By combining the already-reported critical size for deformation mode transition in various metallic glasses, it is found that the critical size is primarily proportional to the homologous temperature.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.01.025