Paper Title:
Impact Fracture Behavior of Zr-Based Bulk Metallic Glass Using Subsize Charpy Specimen
  Abstract

The impact fracture behavior of Zr-based bulk metallic glass was investigated by an instrumented impact tester using subsize Charpy specimens. Influences of loading rate and notch shape on the fracture behavior of amorphous Zr-Al-Ni-Cu alloy were examined. As a result, the maximum load and absorbed fracture energy under impact loading were lower than those under quasi-static loading. A large part of the absorbed fracture energy in the Zr-based BMG was consumed in the process for crack initiation and not for crack propagation. In addition, fractographic characteristics of BMGs were investigated. Fractured surfaces under impact loading are smoother than those under quasi-static loading. The absorbed fracture energy appeared differently depending on the appearance of the shear bands developed. It can be found that the fracture energy and fracture toughness of Zr-based BMG are closely related with the extent of shear bands developed during fracture.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
1356-1364
DOI
10.4028/www.scientific.net/KEM.297-300.1356
Citation
H. S. Shin, K. H. Kim, Y. J. Jung, D. K. Ko, "Impact Fracture Behavior of Zr-Based Bulk Metallic Glass Using Subsize Charpy Specimen ", Key Engineering Materials, Vols. 297-300, pp. 1356-1364, 2005
Online since
November 2005
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$32.00
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