Abstract：Shear banding behaviors in metallic glasses(MGs) are studied in the present paper. Based on the band-like solution and the critical wavelength of shear banding instability, the critical free volume concentration of shear banding instability and the thickness of shear band in MGs are predicted. The results agree well with experimental observations and simulations. We also demonstrates that the prediction of shear band thickness, which is based on the critical wavelength, is only valid for a short time after shear instability and the diffusion of defects should be included in the mature shear band in MGs. The physical factors governing the thickness of shear bands are also illustrated. The results indicate that the thickness of shear bands is insensitive to the Poison’s ratio and is governed by the features and evolution of the defects (STZs).
2012, Vol. 33 