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Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium
Journal article   Peer reviewed

Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium

N. Keskar, S. Mukherjee, K.V. Mani Krishna, D. Srivastava, G.K. Dey, P. Pant, R.D. Doherty and I. Samajdar
Acta materialia, v 69
May 2014
DOI: https://doi.org/10.1016/j.actamat.2014.01.023

Abstract

Digital image correlation (DIC) Electron backscattered diffraction (EBSD) Plastic deformation Shear strain Zirconium
An algorithm is used to estimate mesoscopic strains in a deformed polycrystalline material. This requires comparison of microstructures before and after imposed macroscopic plastic deformations, in order to estimate the local/mesoscopic strains from the displacements of identifiable grain boundary segments. The algorithm was applied to lightly plane strain compressed (PSC) polycrystalline zirconium. Very large (up to 1.2) near-boundary mesoscopic shear strains were estimated. These were well above the estimated measurement uncertainties and remarkably larger than the extremely small (0.01–0.04) PSC strains imposed. Opposing local shears, on both sides of a grain boundary, appeared to compensate each other. Direct correlations were noted, in the same grain, between mesoscopic shear strains and (i) in-grain misorientations and (ii) subsequent grain fragmentation.

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30 citations in Web of Science
30 citations in Scopus

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
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