2015
ACLN
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P.Ganster, A.Borbely, V.Barnier, P.Desgardin, M.F.Barthe, F.Soisson, M.Nastar, L.Martinelli, C.Degranges, 'Effects of Compression Tests on Point Defects in Pure Ni and Ni-16wt%Cr Model Alloys.', defect & diffusion Forum 363 202 (2015) doi:10.4028/www.scientific.net/ddf.363.202
On Ni and Ni-16wt%.Cr model-alloys compressed at 30% and 60% deformation, pointdefects and dislocations concentrations are respectively characterized by positron annihilation spectroscopy and x-ray diffraction analysis. The positron results show that only mono-vacancies are formed during compressive test. The X-ray results allows us to quantify the dislocation concentration in the systems. Saturation of defect densities is observed in measurements for these high deformation rates. In support to the experimental work, an homogeneous kinetic model is used to characterize point-defect - dislocation interactions to estimate the kinetics of vacancy restoration to equilibrium concentration.
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