Cyclic deformation of α-β brass two-phase bicrystals—I. Slip behavior

Slip behavior in cyclic-deformation has been studied using the α-β brass two-phase bicrystals, the phase-interface plane of which is parallel to the stress axis. Tension-compression tests were performed at room temperature under constant total strain amplitude of ±0.4%. Different slip patterns were developed in the vicinity of the interface at opposite surfaces of the α phase, while the patterns in the β phase were almost similar. It was thought that the behavior in β reflects its intrinsic monocrystalline property in response to the external stress. On the other hand, different slip behavior in α was interpreted in terms of the effect due to elastic strain incompatibility at the interface as given by Hook and Hirth [Acta metall.15, 535 (1967)]. The effect due to elastic strain incompatibility was shown to be more significant in cyclic straining.