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Effect of Grain Shape on Texture Formation during Severe Plastic Deformation of Pure Copper
Author(s) -
Jahedi Mohammad,
Beyerlein Irene J.,
Paydar Mohammad Hossein,
Knezevic Marko
Publication year - 2018
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600829
Subject(s) - equiaxed crystals , materials science , torsion (gastropod) , plasticity , shear (geology) , grain size , copper , severe plastic deformation , composite material , texture (cosmology) , diffraction , electron backscatter diffraction , metallurgy , microstructure , optics , image (mathematics) , artificial intelligence , computer science , medicine , surgery , physics
In this study, the authors use a combination of electron backscattered diffraction and polycrystal plasticity modeling to study the effect of grain shape on texture development in high pressure torsion and high pressure double torsion in high purity Cu. With varying applied pressures and after a large amount of strain corresponding to two to four turns, the average aspect ratios of the grains has changed from being elongated under higher pressures to nearly equiaxed for lower pressures, while keeping the average grain size similar among all samples analyzed. Polycrystal modeling is used to help isolating the deformation effect from the grain shape effect. The authors show that grains with elongated shapes form shear textures with a predominant C component, whereas those with largely equiaxed grains possess conventional shear textures.