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Surface nanodeformation of discontinuously reinforced Ti composite by in situ atomic force microscope observation

Published online by Cambridge University Press:  31 January 2011

Y. Tanaka ,
J.-M. Yang ,
Y.F. Liu  and
Y. Kagawa
Y. Tanaka*
Affiliation:
National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
J.-M. Yang
Affiliation:
Department of Materials Science and Engineering, University of California, Los Angeles, California 90095-1595
Y.F. Liu
Affiliation:
Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo 153-8505, Japan
Y. Kagawa
Affiliation:
National Institute of Materials Science, Tsukuba, Ibaraki 305-0047, Japan; and Research Center for Advanced Science and Technology, The University of Tokyo, Meguro-ku, Tokyo 153-8505, Japan
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The surface nanodeformation of a discontinuously reinforced Ti–6Al–4V composite during tensile loading was investigated by in situ atomic force microscope (AFM) observation. The material used was a TiB whisker and TiC particle reinforced Ti–6Al–4V composite. The evolution of surface roughness and slip band spacing was quantified as a function of applied strain. The microstructural damage during tensile loading was also studied. The formation of slip bands within a grain of the Ti–6Al–4V matrix was clearly observed when the applied strain above was 1.3%. The amount of slip bands and surface roughness increase with increasing applied strain. The rupture of TiC particle and multiple cracking of TiB whiskers were also observed at the applied strain above 1.3%. The interaction of slip bands with the reinforcements and mechanisms of deformation and fracture of the composite were elucidated.

Keywords

Scanning probe microscopy (SPM)CompositeTi
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3098 - 3106
Copyright
Copyright © Materials Research Society 2007

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