Paper Title:
Microfracture Observation of Zr-Based Bulk Metallic Glasses
  Abstract

Microfracture mechanisms of Zr-based bulk metallic glass (BMG) alloy containing ductile crystalline particles were investigated by directly observing microfracture processes using an in situ loading stage. Strength of the BMG alloy containing crystalline particles was lower than that of the monolithic BMG alloy, while ductility was higher. According to the direct microfracture observation, crystalline particles initiated shear bands, acted as blocking sites of shear band or crack propagation, and provided the stable crack growth which could be confirmed by the R-curve analysis, although they negatively affected apparent fracture toughness. This increase in fracture resistance with increasing crack length improved overall fracture properties of the alloy containing crystalline particles, and could be explained by mechanisms of blocking of crack or shear band propagation, formation of multiple shear bands, crack blunting, and shear band branching.

  Info
Periodical
Key Engineering Materials (Volumes 345-346)
Edited by
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages
645-648
DOI
10.4028/www.scientific.net/KEM.345-346.645
Citation
J. G. Lee, K. S. Sohn, S. H. Lee, N. J. Kim, C. N. P. Kim, "Microfracture Observation of Zr-Based Bulk Metallic Glasses", Key Engineering Materials, Vols. 345-346, pp. 645-648, 2007
Online since
August 2007
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Price
$32.00
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