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The dynamic compressive behavior of beryllium bearing bulk metallic glasses

Published online by Cambridge University Press:  31 January 2011

H. A. Bruck ,
A. J. Rosakis  and
W. L. Johnson
H. A. Bruck
Affiliation:
Idaho National Engineering Labs, Mail Stop 2218, Idaho Falls, Idaho 83415–2218
A. J. Rosakis
Affiliation:
Department of Aeronautics, California Institute of Technology, Mail Stop 105–50, Pasadena, California 91125
W. L. Johnson
Affiliation:
Department of Materials Science, California Institute of Technology, Mail Stop 105–50, Pasadena, California 91125
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Abstract

In 1993, a new beryllium bearing bulk metallic glass with the nominal composition Zr41.25Ti13.75Cu12.5Ni10Be22.5 was discovered at Caltech. This metallic glass can be cast as cylindrical rods as large as 16 mm in diameter, which permitted specimens to be fabricated with geometries suitable for dynamic testing. For the first time, the dynamic compressive yield behavior of a metallic glass was characterized at strain rates of 102 to 104/s by using the split Hopkinson pressure bar. A high-speed infrared thermal detector was also used to determine if adiabatic heating occurred during dynamic deformation of the metallic glass. From these tests it appears that the yield stress of the metallic glass is insensitive to strain rate and no adiabatic heating occurs before yielding.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 2 , February 1996 , pp. 503 - 511
Copyright
Copyright © Materials Research Society 1996

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