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Effects of sample geometry on deformation modes of bulk metallic glasses at the nano/micrometer scale

Published online by Cambridge University Press:  31 January 2011

Jianchao Ye ,
Jian Lu ,
Yong Yang  and
Peter K. Liaw
Jianchao Ye
Affiliation:
The Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
Jian Lu
Affiliation:
The Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
Yong Yang*
Affiliation:
The Department of Mechanical Engineering, the Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, People’s Republic of China
Peter K. Liaw
Affiliation:
The Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996-2200
*
a) Address all correspondence to this author. e-mail: mmyyang@polyu.edu.hk
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Abstract

Intense debates have been prompted concerning whether homogeneous deformation can be achieved in bulk metallic glasses at room temperature through the suppression of shear bands at the submicron scale. In this short communication, we demonstrate that multiple shear banding can be successfully attained via a proper modification of the microsample geometry, resulting in the appearance of a homogeneous deformation mode at the submicron scale. However, the apparent deformation homogeneity in our microcompression experiment is a manifestation of the sample geometry effect on the propagation rather than nucleation of shear bands.

Keywords

AmorphousMetalMorphology
Type
Rapid Communications
Information
Journal of Materials Research , Volume 24 , Issue 11 , November 2009 , pp. 3465 - 3468
Copyright
Copyright © Materials Research Society 2009

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