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- W196865473 abstract "Localization of the plastic deformation during metal forming processes depends upon various characteristics of the material, such as texture, hardening constitutive law and upon boundary conditions. The elementary mechanisms leading to such heterogeneous mode of deformation are analyzed in iron single crystals using recent techniques: tensile tests inside a Scanning Electron Microscope (SEM), microextensometry by microgrids, stereography and Electron BackScattering Diffraction (EBSD), in order to determine in 3D, the components of the deformation gradient tensor F and the orientation of the lattice R, at different stages of the plastic deformation, in each element of the microgrid. A kink band is observed in the necking area of the samples. The conditions of such localization, are analyzed in terms of velocity strain and spin fields (D and ω respectively) and lattice spin field ωe. These tensors are computed in the band and in the matrix, from measured increments of F and R, assuming a linear evolution of these tensors between two states of deformation. The evolution of D, ω and ωe fields, are computed at different stages of propagation of this instability. Large gradients of the lattice rotation field and of the plastic strain field are pointed out within the observed band. Propagation mechanism of the band is analyzed." @default.
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- W196865473 date "1999-01-01" @default.
- W196865473 modified "2023-09-30" @default.
- W196865473 title "ANALYSIS OF SHEAR LOCALIZATION IN IRON SINGLE CRYSTALS BY LOCAL STRAIN FIELD AND LATTICE ROTATION FIELD MEASUREMENTS" @default.
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- W196865473 doi "https://doi.org/10.1016/b978-1-85573-424-1.50007-1" @default.
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