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Texture evolution and operative mechanisms during large-strain deformation of nanocrystalline nickel

Gurao, NP and Suwas, Satyam (2011) Texture evolution and operative mechanisms during large-strain deformation of nanocrystalline nickel. In: Philosophical Magazine, 91 (5). pp. 798-817.

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Abstract

The large-strain deformation of nanocrystalline nickel was investigated at room temperature and cryogenic (liquid N-2) temperature. Deformation mechanisms ranging from grain boundary sliding to slip, operate due to a wide distribution of grain sizes. These mechanisms leave their finger print in the deformation texture evolution during rolling of nanocrystalline nickel. The occurrence and severance of different mechanisms is understood by a thorough characterization of the deformed samples using X-ray diffraction, X-ray texture measurements, electron back-scattered diffraction and transmission electron microscopy. Crystal plasticity-based viscoplastic self-consistent simulations were used to further substantiate the experimental observations. Thus, a comprehensive understanding of deformation behavior of nanocrystalline nickel, which is characterized by simultaneous operation of dislocation-dominated and grain boundary-mediated mechanisms, has been developed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Keywords: nanocrystalline material; nickel; plastic deformation; texture; grain growth
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 09 Mar 2011 05:26
Last Modified: 09 Mar 2011 05:26
URI: http://eprints.iisc.ac.in/id/eprint/35883

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