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Comparing the Role of Dislocations during Plastic Deformation of Nanocrystalline Nickel and Coarse-Grained Nickel during Cold Rolling

Published online by Cambridge University Press:  01 February 2011

Andreas Kulovits ,
Scott M Mao  and
Jorg M Wiezorek
Andreas Kulovits
Affiliation:
akk8@pitt.edu, University of Pittsburgh, Department of Mechanical Engineering and Materials Science, 848 Benedum Hall, 3700 O Hara Street, Pittsburgh, PA, 15261, United States, 412-624-9750
Scott M Mao
Affiliation:
smao@engr.pitt.edu, University of Pittsburgh, Department of Mechanical Engineering and Materials Science, 848 Benedum Hall, 3700 O Hara Street, Pittsburgh, PA, 15261, United States
Jorg M Wiezorek
Affiliation:
wiezorek@pitt.edu, University of Pittsburgh, Department of Mechanical Engineering and Materials Science, 848 Benedum Hall, 3700 O Hara Street, Pittsburgh, PA, 15261, United States
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Abstract

We investigated plastic deformation of fully dense electrodeposited nanocrystalline (NC) Ni with an average grain size of 30-40nm. We studied the microstructural evolution during cold rolling of NC Ni to a reduction in thickness up to 76% (true strain equivalent ∼1.42). We determined changes in texture, grain morphology, grain boundary character and grain sizes as a function of cold rolling strain, using X-ray diffraction and transmission electron microscopy TEM. We compared our results of the NC Ni with our own results for cold rolled coarse grained (CG) Ni. Differences and similarities in deformation behavior are discussed with respect to well documented findings in the literature.

Keywords

Nimicrostructuredefects
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1090: Symposium Z – Materials Structures–The Nabarro Legacy , 2008 , 1090-Z05-08
Copyright
Copyright © Materials Research Society 2008

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