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Mechanical properties of Zr57Nb5Al10Cu15.4Ni12.6 metallic glass matrix particulate composites

Published online by Cambridge University Press:  31 January 2011

R. D. Conner ,
H. Choi-Yim  and
W. L. Johnson
R. D. Conner
Affiliation:
W.M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125
H. Choi-Yim
Affiliation:
W.M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125
W. L. Johnson
Affiliation:
W.M. Keck Laboratory of Engineering Materials, California Institute of Technology, Pasadena, California 91125
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Abstract

To increase the toughness of a metallic glass with the nominal composition Zr57Nb5Al10Cu15.4Ni12.6, it was used as the matrix in particulate composites reinforced with W, WC, Ta, and SiC. The composites were tested in compression and tension experiments. Compressive strain to failure increased by more than 300% compared with the unreinforced Zr57Nb5Al10Cu15.4Ni12.6, and energy to break of the tensile samples increased by more than 50%. The increase in toughness came from the particles restricting shear band propagation, promoting the generation of multiple shear bands and additional fracture surface area. There was direct evidence of viscous flow of the metallic glass matrix within the confines of the shear bands.

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Articles
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Journal of Materials Research , Volume 14 , Issue 8 , August 1999 , pp. 3292 - 3297
Copyright
Copyright © Materials Research Society 1999

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