EFFECT OF DEFORMATION TEMPERATURE ON CYCLIC PLASTICITY

The stress-strain response and the dislocation structure have been stu died on nickel crystals cyclically strained into the saturation stage at temperatures between 77 and 900 K in a wide range of resolved shear strain amplitudes. The paper surveys the effect of the deformation te mperature on mechanical data and on parameters of the microstructure f or crystals oriented for single slip. The microstructure is analysed o n a macroscopic, a mesoscopic and a microscopic scale. On the basis of the experimentally observed data some interesting aspects of recent m odels of cyclic plasticity are discussed. (C) 1997 Elsevier Science S. A.