MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Influence of Size and Number of Nanocrystals on Shear Band Formation in Amorphous Alloys
Junyoung ParkYoji ShibutaniMasato WakedaShigenobu Ogata
Author information
JOURNAL FREE ACCESS

2007 Volume 48 Issue 5 Pages 1001-1006

Details
Abstract

In this study, binary (copper and zirconium) amorphous metals with embedded nanosized crystal structures are subjected to uniaxial tension using molecular dynamics simulations to reveal the mechanism of shear band structure formation. The number and the size of the nanocrystals are chosen as the study parameters. The number of nanocrystals affects the stress-strain curve and shear band formation while the size of the nanocrystals does not significantly affect the results. As reported in the experimental work published so far, under tension coalescent voids are found in the shear bands or at the interface between crystalline and amorphous materials. The simulation results show that the number of shear bands under compressive loading is much larger than that under tensile loading. We also found that, even under compressive loading, the shear bands started from regions with enough free volume.

Content from these authors
© 2007 The Japan Institute of Metals and Materials
Previous article Next article
feedback
Top