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Orientation-dependent plastic deformation in transformer steel: Experiments and dislocation dynamics simulations

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Title Orientation-dependent plastic deformation in transformer steel: Experiments and dislocation dynamics simulations
 
Creator SHEKHAWAT, SK
CHAKRABARTY, R
BASAVARAJ, V
HIWARKAR, VD
MANI, KV
GURUPRASAD, PJ
BENZERGA, AA
SURESH, KG
SAMAJDAR, I
 
Subject ORIENTED ELECTRICAL STEEL
CUBIC SINGLE-CRYSTALS
SILICON-STEEL
TENSILE DEFORMATION
MAGNETIC-PROPERTIES
BUILDING FACTORS
BEHAVIOR
MICROSTRUCTURE
MODEL
INDENTATION
Transformer steel
Plastic deformation
EBSD
Microtexture
Dislocation dynamics
 
Description The anisotropic tensile response of fully processed cold-rolled grain-oriented (CRGO) steel was studied for two crystallographic orientations: (1 1 0) [0 0 1] and (1 1 0) [1 (1) over bar 1]. They showed remarkably different stress strain behavior and corresponding developments in deformed microstructures. The (1 1 0) [0 0 1] oriented CRGO steel specimens retained their orientation stability until epsilon (true strain) = 0.07. On the other hand, (1 1 0) [1 (1) over bar 1] oriented specimens underwent significant reorientation and displayed formation of strain localizations by epsilon = 0.03. Discrete dislocation dynamics (DDD) simulations were carried out - three-dimensional (3-D) for "limited" (similar to 10(-4)) plastic strain and two-dimensional (2-D) for the experimentally imposed strain - to investigate the orientation effects on the tensile response of the CRGO steel specimens. 2-D DDD simulations were able to provide qualitative and quantitative estimates of the post-yield tensile behavior of (1 1 0) [0 0 1] and (1 1 0) [1 (1) over bar 1] samples. Direct comparison between experimental and simulation results confirmed the orientation effect on the overall macroscopic response of the specimens. It was observed that the response of (1 1 0) [1 (1) over bar 1] specimens showed features of reorientation and textural softening and these were captured by the Taylor type deformation simulations. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T12:52:08Z
2016-01-14T12:52:08Z
2015
 
Type Article
 
Identifier ACTA MATERIALIA, 84,256-264
1359-6454
1873-2453
http://dx.doi.org/10.1016/j.actamat.2014.10.042
http://dspace.library.iitb.ac.in/jspui/handle/100/17544
 
Language en