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Effect of irradiation on the microstructure and mechanical behavior of nanocrystalline nickel

Sharma, Garima and Sarkar, Apu and Varshney, Jalaj and Ramamurty, U and Kumar, Ajay and Gupta, SK and Chakravartty, JK (2011) Effect of irradiation on the microstructure and mechanical behavior of nanocrystalline nickel. In: Scripta Materialia, 65 (8). pp. 727-730.

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Official URL: http://dx.doi.org/10.1016/j.scriptamat.2011.07.021

Abstract

The effect of 4.0 MeV proton irradiation on the microstructure and mechanical properties of nanocrystalline (nc) nickel was investigated. The irradiation damage induced in the sample was of the order of 0.004 dpa. Transmission electron microscopy of irradiated samples indicated the presence of dislocation loops within the grains. An increase in hardness and strain-rate sensitivity (m) of nc-Ni with irradiation was noted. The rate-controlling deformation mechanism in irradiated nc-Ni was identified to be interaction of dislocations with irradiation-induced defects. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Nickel;Nanostructure;Nanocrystalline materials; Nanoindentation;Irradiation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 04 Nov 2011 09:09
Last Modified: 04 Nov 2011 09:09
URI: http://eprints.iisc.ernet.in/id/eprint/41633

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