TWIN BOUNDARY-INDUCED INTRINSIC STRENGTHENING IN Ni
Thin Solid Films(2013)
摘要
The manuscript presents a combined experimental/simulation study of the intrinsic strengthening of the material near twin boundaries. Polychromatic X-ray micro Laue diffraction together with electron backscattering diffraction shows that dislocation slippage is suppressed near the twin boundaries. Indentation demonstrates increased hardness in the immediate vicinity of the twin boundary. Distinct slip bands are observed in the interior of the macroscopic ~500μm thick twin. Fast oscillations of lattice rotations are found within each slip band. Crystal plasticity analysis using a spectral formulation finds a similar dependence of the plastic response of the matrix and the twin depending on their orientation and initial structural conditions.
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关键词
Twin boundaries,Grain boundaries,Strain field,X-ray diffraction
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