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A Modified Free Volume Model for Characterizing of Rate Effect in Bulk Metallic Glasses |
| LIU Long-Fei1,2;DAI Lan-Hong2;BAI Yi-Long2 |
| 1Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 4112012State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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LIU Long-Fei, DAI Lan-Hong, BAI Yi-Long 2008 Chin. Phys. Lett. 25 1052-1055 |
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Abstract We investigate the plastic deformation and constitutive behaviour of bulk metallic glasses (BMGs). A dimensionless Deborah number DeID=tr/ti is
proposed to characterize the rate effect in BMGs, where tr is the structural relaxing characteristic time of BMGs under shear load, ti is the macroscopic imposed characteristic time of applied stress or the characteristic time of macroscopic deformation. The results demonstrate that the modified free volume model can characterize the strain rate effect in BMGs effectively.
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| Keywords:
62.20.-x
62.20.Dc
61.43.Er
72.40.+i
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Received: 25 September 2007
Published: 27 February 2008
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