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Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium

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Title Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium
 
Creator KESKAR, N
MUKHERJEE, S
KRISHNA, KVM
SRIVASTAVA, D
DEY, GK
PANT, P
DOHERTY, RD
SAMAJDAR, I
 
Subject Shear strain
Plastic deformation
Zirconium
Digital image correlation (DIC)
Electron backscattered diffraction (EBSD)
CHANNEL DIE COMPRESSION
ELECTRON BACKSCATTER DIFFRACTION
RELAXED TAYLOR THEORY
FINITE-ELEMENT
GRAIN SUBDIVISION
HETEROGENEOUS DEFORMATION
PLASTIC-DEFORMATION
DEFORMED ALUMINUM
SINGLE-CRYSTALS
ROLLING DEFORMATION
 
Description 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. 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-28T16:38:51Z
2014-12-28T16:38:51Z
2014
 
Type Article
 
Identifier ACTA MATERIALIA, 69265-274
1359-6454
1873-2453
http://dx.doi.org/10.1016/j.actamat.2014.01.023
http://dspace.library.iitb.ac.in/jspui/handle/100/16905
 
Language English