Prasad, Anamika and Dao, Ming and Ramamurty, Upadrasta (2009) Effect of Dilatation on the Elasto-Plastic Response of Bulk Metallic Glasses Under Indentation. In: MRS Proceedings, 1224 .
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Elasto-plastic response of bulk metallic glasses (BMGs) follows closely the response of granular materials through pressure dependent (or normal stress) yield locus and shear stress induced material dilatation. On a micro-structural level, material dilatation is responsible for stress softening and formation of localized shear band, however its influence on the macro-scale flow and deformation is largely unknown. In this work, we systematically analyze the effect of material dilatation on the gross indentation response of Zr-based BMG via finite element simulation. The strengthening/softening effect on the load-depth response and corresponding stress-strain profiles are presented in light of differences in elastic-plastic regimes under common indenters. Through comparison with existing experimental results, we draw conclusions regarding selection of suitable dilatation parameters for accurately predicting the gross response of BMGs
| Item Type: | Journal Article |
|---|---|
| Publication: | MRS Proceedings |
| Publisher: | Cambridge University Press |
| Additional Information: | Copyright of this article belongs to Cambridge University Press. |
| Keywords: | Amorphous;nano-indentation;stress/strain relationship |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 17 Aug 2011 06:49 |
| Last Modified: | 17 Aug 2011 06:49 |
| URI: | http://eprints.iisc.ac.in/id/eprint/39938 |
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