A QUANTITATIVE MEASURE OF MEAN SLIP DISTANCE USING A DISPERSION STRENGTHENED HIGH CONDUCTIVITY COPPER

摘要

The calibration of the mean slip distance λ determined from the tensile tests was compared to the deformation cell size dc of [001] copper crystal and that calculable from a particle-dispersed copper alloy as a function of the flow stress. For deformation at 78 K, λ ≈ d_C/3 and the calculated λ for the two-phase alloy was about 3 times higher than the measured one. The strain rate sensitivity measurement showed that the particles are thermally shearable such that, above 195 K, a constant λ region to indicate the limiting effect of the dispersion disappeared.