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Effect of strain path and the magnitude of prestrain on the formability of a low carbon steel: On the textural and microtextural developments

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Title Effect of strain path and the magnitude of prestrain on the formability of a low carbon steel: On the textural and microtextural developments
 
Creator YERRA, SK
VANKUDRE, HV
DATE, PP
SAMAJDAR, I
 
Subject work-hardening/softening behavior
if-steel
bcc polycrystals
single-crystals
stored energy
shear bands
sheet
compression
deformation
evolution
 
Description A low carbon steel (0.07-wt % carbon) sheet metal was deformed in five different strain paths, from equi-biaxial tension to plane strain to near uniaxial tension, by in-plane stretching. Textural developments were characterized by X-ray Orientation Distribution Function (ODFs) and the same were simulated using different Taylor type deformation texture models. A strong difference in bulk texture developments was observed at respective strain paths. The textural differences largely explain the changes observed in normal anisotropy values obtained by mechanical testing. The new deformation texture simulation model, Lamel, was quite successful in predicting quantitatively such textural differences. Microscopically, the significant features of the substructures were "strain localizations "first generation dense dislocation walls (DDWs) and micro bands (MBs). Both in-grain rotations and estimated stored energies did depend on the relative appearance of such strain localizations. These, on the other hand, were distinctly related to the textural softening or dM/depsilon, where M and epsilon are the Taylor factor and true strain, respectively.
 
Publisher ASME-AMER SOC MECHANICAL ENG
 
Date 2011-07-18T17:11:13Z
2011-12-26T12:50:44Z
2011-12-27T05:36:45Z
2011-07-18T17:11:13Z
2011-12-26T12:50:44Z
2011-12-27T05:36:45Z
2004
 
Type Article
 
Identifier JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 126(1), 53-61
0094-4289
http://dx.doi.org/10.1115/1.1631435
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4995
http://hdl.handle.net/10054/4995
 
Language en