Abstract
The deformation and fracture behaviours of the α-β brass two-phase bicrystals were studied at 450 K. It was found that four slip systems were always operating in the bicrystal, two in each constituent or one in β and three in α. The yield stress values were higher in general at 450 K than at room temperature and at 150 K. In addition, lower work hardening rates, lower U.T.S. and higher ductilities were observed at 450 K. The yield drop phenomenon was also observed. The continuity of slip between the α- and β-crystals at the interface was evident during the deformation of the bicrystals at 450 K . The fracture surface at 450 K revealed a smooth ripple pattern in the β-phase and elongated shear dimples in the α-phase.
