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Spall strength and Hugoniot elastic limit of a zirconium-based bulk metallic glass under planar shock compression

Published online by Cambridge University Press:  03 March 2011

Fuping Yuan
Affiliation:
Case School of Engineering, Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222
Vikas Prakash*
Affiliation:
Case School of Engineering, Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222
John J. Lewandowski*
Affiliation:
Case School of Engineering, Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7222
*
a) Address all correspondence to this author. e-mail: vikas.prakash@case.edu
b)This author was an editor of this focus issue during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy.
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Abstract

Results are presented on the shock response of a zirconium-based bulk metallic glass (BMG), Zr41.25Ti13.75Ni10Cu12.5Be22.5, subjected to planar impact loading. An 82.5-mm bore single-stage gas-gun facility at Case Western Reserve University, Cleveland, OH, was used to conduct the shock experiments. The particle velocity profiles, measured at the back (free) surface of the target plate by using the velocity interferometer system for any reflector (VISAR), were analyzed to (i) better understand the structure of shock waves in BMG subjected to planar shock compression, (ii) estimate residual spall strength of the BMG after different levels of shock compression, and (iii) obtain the Hugoniot elastic limit (HEL) of the material. The spall strength was found to decrease moderately with increasing levels of the applied normal impact stress. The spall strength at a shock-induced stress of 4.4 GPa was 3.5 GPa while the spall strengths at shock-induced stresses of 5.1, 6.0, and 7.0 GPa were 2.72, 2.35, and 2.33 GPa, respectively. The HEL was estimated to be 6.15 GPa.

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Copyright
Copyright © Materials Research Society 2007

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