Strain rate sensitivity studies in an ultrafine-grained Al-30wt.%Zn alloy using micro- and nano-indentation


Chinh, N.Q., Csanádi, T., Györi, T., Valiev, R.Z., Straumal, B.B., Kawasaki, M. and Langdon, T.G. (2012) Strain rate sensitivity studies in an ultrafine-grained Al-30wt.%Zn alloy using micro- and nano-indentation. Materials Science and Engineering A, 543, 117-120. (http://dx.doi.org/10.1016/j.msea.2012.02.056).

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Description/Abstract

The characteristics of plastic deformation of an ultrafine-grained (UFG) Al–30 wt.% Zn alloy were investigated using depth-sensing micro- and nanoindentation. Emphasis was placed on the effects of grain boundaries and the unusually high strain rate sensitivity. It is shown that there is a close relationship between enhanced strain rate sensitivity and ductility in this UFG material and this is associated with grain boundary sliding and enhanced diffusion along the Al/Al grain boundaries which appear to be wetted by Zn-rich layers.

Item Type: Article
ISSNs: 0921-5093 (print)
Keywords: ultrafine-grained materials, grain boundary sliding, wetted boundaries, strain rate sensitivity, micro and nanoindentation
Subjects: T Technology > TP Chemical technology
T Technology > TS Manufactures
Divisions: Faculty of Engineering and the Environment > Engineering Sciences > Engineering Materials Surface Engineering
ePrint ID: 340527
Date Deposited: 25 Jun 2012 10:59
Last Modified: 27 Mar 2014 20:23
URI: http://eprints.soton.ac.uk/id/eprint/340527

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