Study of stress localization in polycrystalline grains using self-consistent model and neutron diffraction
Taylor and Francis
The time-of-flight neutron diffraction technique and the elastoplastic selfconsistent model were used to study the behaviour of single and multiphase materials. Critical resolved shear stresses and hardening parameters in austenitic and austenitic–ferritic steels were found by analysing the evolution of the lattice strains measured during tensile tests. Special attention was paid to the changes of the grain stresses occurring due to transition from elastic to plastic deformation. Using a new method of data analysis, the variation of the stress localisation tensor as a function of macrostress was measured. The experimental results were successfully compared with model predictions for both phases of the duplex steel and also for the austenitic sample.