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Plastic zone at crack tip: A nanolab for formation and study of metallic glassy nanostructures

Published online by Cambridge University Press:  31 January 2011

X.X. Xia ,
Wei H. Wang  and
A. Lindsay Greer
Wei H. Wang*
Affiliation:
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
A. Lindsay Greer
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, United Kingdom
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

We report that various metallic glassy nanostructures including nanoridges, nanocones, nanowires, nanospheres, and nanoscale-striped patterns are spontaneously formed on the fracture surface of bulk metallic glasses at room temperature. A clear correlation between the dimensions of these nanostructures and the size of the plastic zone at the crack tip has been found, providing a way to control nanostructure sizes by controlling the plastic zone size intrinsically or extrinsically. This approach to forming metallic glassy nanostructures also has implications for understanding the deformation and fracture mechanisms of metallic glasses.

Keywords

AmorphousFractureNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 9 , September 2009 , pp. 2986 - 2992
Copyright
Copyright © Materials Research Society 2009

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