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Effects of partial crystallization on compression and fatigue behavior of Zr-based bulk metallic glasses

Published online by Cambridge University Press:  03 March 2011

G.Y. Wang*
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
P.K. Liaw
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
Y. Yokoyama
Affiliation:
Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
M. Freels
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
R.A. Buchanan
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
A. Inoue
Affiliation:
Advanced Research Center of Metallic Glasses, Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
C.R. Brooks
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
*
a) Address all correspondence to this author. e-mail: gwang@utk.edu
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Abstract

Zr50Cu40Al10, Zr50Cu30Al10Ni10, and Zr50Cu37Al10Pd3 (in at.%) are bulk metallic glasses (BMGs) with partial crystallization that were characterized by x-ray diffraction (XRD). The study of mechanical properties was conducted in compression at room temperature. Four-point-bend fatigue experiments were performed on the zirconium (Zr)-based BMGs in air. Under compressive loading, after the elastic deformation, no obvious plasticity occurred before the final shear fracture. The compression strengths are comparable to those of fully amorphous alloys. However, the fatigue-endurance limits of these BMGs were much lower than those of fully amorphous alloys. These results suggested that the fatigue behavior of a BMG is very sensitive to the microstructure, while the compression strength is not.

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Copyright
Copyright © Materials Research Society 2007

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