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The many facets of deformation mechanism mapping and the application to nanostructured materials

Published online by Cambridge University Press:  23 April 2013

Megumi Kawasaki  and
Terence G. Langdon
Megumi Kawasaki*
Affiliation:
Division of Materials Science and Engineering, Hanyang University, Seongdong-gu, Seoul 133-791, South Korea; and Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1453
Terence G. Langdon
Affiliation:
Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-14533; and Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, United Kingdom
*
a)Address all correspondence to this author. e-mail: megumi@hanyang.ac.kr
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Abstract

Deformation mechanism maps are well established in the field of high temperature creep for materials having conventional coarse grain sizes but they are almost unknown within the field of nanostructured materials. This paper summarizes the background to deformation mechanism mapping, presents simplified examples that may be used to easily construct appropriate maps for any selected condition, demonstrates the potential extension of this approach to other areas such as creep fracture, and then considers the potential limitations associated with using the same approach to predict the deformation mechanisms in true nanostructured materials. Two representative deformation mechanism maps are shown for an ultrafine-grained alloy processed either by equal-channel angular pressing or by high-pressure torsion.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 13: FOCUS ISSUE: Frontiers in Thin-Film Epitaxy and Nanostructured Materials , 14 July 2013 , pp. 1827 - 1834
Copyright
Copyright © Materials Research Society 2013 

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