Role of discrete intragranular slip on lattice rotations in polycrystalline Ni: Experimental and micromechanical studies
作者： C. Perrin , S. Berbenni , H. Vehoff , M. Berveiller
DOI: 10.1016/J.ACTAMAT.2010.04.033
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摘要: Abstract In this paper, a new micromechanical approach accounting for the discreteness of intragranular slip is used to derive local misorientations in case plastically deformed polycrystalline nickel uniaxial tension. This microstructure characterized particular single grains by atomic force microscopy measurements early stage plastic deformation. The modelling accounts individual grain size, spatial distances between active bands and magnitude bands. are modelled using discrete distributions circular super glide dislocation loops constrained at boundaries spherical boundary embedded an infinite matrix. contrast with classic mean field approaches based on Eshelby’s inclusion concept, present model able capture different behaviours near regions interiors. These theoretical results quantitatively confirmed electron backscatter diffraction regarding misorientation mapping respect reference point centre grain.
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