EXPERIMENTAL AND NUMERICAL DETERMINATION OF THE INTRAGRANULAR WORK-HARDENING IN A COLD-ROLLED MULTICRYSTAL

A pure copper multicrystal has been cold rolled up to an overall true strain of epsilon = 0.4. The intragranular work hardening state, due t o plastic deformation, has been determined by the analysis of the X-ra y peak-profiles measured within each individual grain with a high reso lution diffractometer. The evolution of the intragranular dislocation density during rolling has been predicted by a finite element code, wh ich explicitly accounts for the crystallographic nature of the materia l and models the plastic deformation within individual grains by cryst allographic slip on specific slip systems. The experimental and the si mulated data were compared in order to discuss the validity of the mod el developed for X-ray peak-profile analysis and the simulation work h ardening law. (C) 1997 Elsevier Science S.A.