Effect of elastic reaction stress on plastic behaviors of grains in polycrystalline aggregate during tensile deformation

A deformation model with the consideration on reaction stress between grains in polycrystalline aggregates is proposed, in order to solve the problems of strain and stress incompatibility appearing in previous Sachs- and Taylor-type models. The corresponding simulation for tensile deformation indicates that the model predicts orientation evolutions similar to that made by Taylor assumption, while the attention to both of the stress and strain compatibility has been given without cryptic fitting parameters. A ‘hard” area, where no track of tensile direction could run through, was predicted near 〈1 1 1〉 according to the simulation, which agrees with some experimental observations.