Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/100/16905
Title: Quantifying the mesoscopic shear strains in plane strain compressed polycrystalline zirconium
Authors: KESKAR, N
MUKHERJEE, S
KRISHNA, KVM
SRIVASTAVA, D
DEY, GK
PANT, P
DOHERTY, RD
SAMAJDAR, I
Keywords: Shear Strain
Plastic Deformation
Zirconium
Digital Image Correlation (Dic)
Electron Backscattered Diffraction (Ebsd)
Issue Date: 2014
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: ACTA MATERIALIA, 69265-274
Abstract: 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.
URI: http://dx.doi.org/10.1016/j.actamat.2014.01.023
http://dspace.library.iitb.ac.in/jspui/handle/100/16905
ISSN: 1359-6454
1873-2453
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