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EXPERIMENTAL OBSERVATIONS OF THE FAILURE MECHANISMS IN A BULK METALLIC GLASS COMPOSITE

Published online by Cambridge University Press:  01 February 2011

Hui Wang ,
Ashraf Bastawros  and
S. Bulent Biner
Hui Wang
Affiliation:
hhwang@iastate.edu, Iowa State University, Aerospace Engineering, 2271 Howe Hall, Rm 1200, Ames, IA, 50011-2271, United States
Ashraf Bastawros
Affiliation:
bastaw@iastate.edu, Iowa State University, Aerospace Engineering, 2271 Howe Hall, Rm 1200, Ames, IA, 50011-2271, United States
S. Bulent Biner
Affiliation:
sbbiner@iastate.edu, Iowa State University, Aerospace Engineering, 2271 Howe Hall, Rm 1200, Ames, IA, 50011-2271, United States
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Abstract

The deformation and damage evolution behavior of a Ni-based bulk metallic glass composite reinforced with elongated brass phase is studied under cylindrical indentation. The estimated fracture toughness values based on the energy dissipation and the in-situ observation during the loading reveal the details of the damage evolution and toughening mechanisms in this composite system. The results indicate that the enhanced toughness of the BMG composite is plausibly an outcome of crack bridging mechanisms by the ductile brass phase, rather than a diffused array of nucleated shear bands in the hard BMG and arrest by the ductile reinforcing phase.

Keywords

compositefractureamorphous
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1048: Symposium Z – Bulk Metallic Glasses–2007 , 2007 , 1048-Z05-01
Copyright
Copyright © Materials Research Society 2008

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