Please use this identifier to cite or link to this item:
|Title:||Softening and dilatation in a single shear band|
Shear band thickness
|Source:||Pan, J., Chen, Q., Liu, L., Li, Y. (2011-08). Softening and dilatation in a single shear band. Acta Materialia 59 (13) : 5146-5158. ScholarBank@NUS Repository. https://doi.org/10.1016/j.actamat.2011.04.047|
|Abstract:||Shear band is the key feature that controls the plastic deformation process of metallic glasses (MGs). However, the investigation directly on the shear band and its properties is rarely conducted as the band is perceived as extremely narrow. We have conducted a controlled experiment to form a single shear band in the specimen, which enabled us to probe shear-induced softening and dilatation directly on the shear band itself. Extreme dilatation and free volume increase as high as 1.14% and 1.40% respectively, have been observed, resulting from a drastic structure change due to severe plastic flow in the band. Nanoindentation on the individual shear band reveals significant softening of 36% and an unexpected wide width up to 160 μm, three magnitudes higher than what has been reported. These prove beyond doubt the dilatation as a mechanism for softening. The correlation between the free volume content and softening is discussed. Our findings provide a new insight for understanding the deformation behavior of metallic glass. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.|
|Source Title:||Acta Materialia|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 13, 2018
WEB OF SCIENCETM
checked on Jan 10, 2018
checked on Feb 18, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.