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The failure stress of bulk metallic glasses under very high strain rate

Published online by Cambridge University Press:  31 January 2011

Wei-Dong Liu ,
Kai-Xin Liu ,
Xing-Xiang Xia  and
Wei-Hua Wang
Kai-Xin Liu*
Affiliation:
LTCS and Department of Mechanics & Aerospace Engineering, College of Engineering, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
Wei-Hua Wang
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The dynamic uniaxial compressive behavior of Zr-based metallic glasses under a wide high strain rate was studied by a miniaturized split Hopkinson pressure bar, including high strain rate up to 104 s−1. Experimental results indicate that the uniaxial compressive failure stress would decrease suddenly and then tend to hold steady with increasing strain rate. This phenomenon provides a generalized perspective for understanding the effect of local heat generation on the deformation of metallic glasses under dynamic loads.

Keywords

Stress/strain relationshipStrengthMetal
Type
Materials Communications
Information
Journal of Materials Research , Volume 25 , Issue 7 , July 2010 , pp. 1230 - 1234
Copyright
Copyright © Materials Research Society 2010

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