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Role of Grain Boundary Sliding in Texture Evolution for Nanoplasticity
Author(s) -
Zhao Yajun,
Toth Laszlo S.,
Massion Roxane,
Skrotzki Werner
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.201700212
Subject(s) - materials science , viscoplasticity , grain boundary sliding , grain boundary , nanocrystalline material , texture (cosmology) , grain boundary strengthening , simple shear , metallurgy , grain size , deformation (meteorology) , plasticity , composite material , shear (geology) , thermodynamics , finite element method , microstructure , constitutive equation , artificial intelligence , computer science , image (mathematics) , physics , nanotechnology
A new crystal plasticity model is presented to account for the effect of grain boundary sliding (GBS) on texture evolution during large plastic deformation of nanocrystalline materials. In the model, 12 grain boundaries are assigned for each grain and their sliding rates are calculated using Newtonian viscoplasticity. The lattice rotation of the grain interior is computed by taking into account the deformation field modification produced by GBS. The model is employed for predicting the texture evolution in a nanocrystalline Pd–10 at%Au alloy subjected to large strain simple shear, up to a shear strain of 16.8. Two main texture effects due to increasing GBS are identified: high reduction in texture intensity, and tilts of the texture components from their ideal orientations. In the alloy considered, the contribution of GBS to the total strain is identified to be about 30%.