The mechanical behaviors of interphase boundaries and microstructures in heavily deformed binary eutectics (Al-Sn, Zn-Sn, Pb-Sn, Cd-Sn) were investigated. Experiments were carried out on atomically clean surfaces of alloys, and on bimetallic joints with clean interfaces, which were used as macro-models of deformed interphase boundaries. It was shown that, for eutectics with a high interphase boundary energy (Al-Sn, Zn-Sn), interphase boundary sliding occurred by means of dislocation glide, accompanied by marked strengthening and the formation of narrow stable interphase boundary cracks with sharp angles. In eutectics with a low interphase boundary energy (Pb-Sn, Cd-Sn), interphase boundary sliding occurred via viscous flow and was accompanied by correlated diffusion along interphase boundaries. A softening of interphase boundaries was observed. The extent of diffusion-controlled accommodation at interphase boundaries depended upon the degree of preliminary deformation and the interphase boundary energy.

Structure Evolution and Diffusion During Interphase Boundary Sliding in Binary Eutectics Based on Sn. F.Muktepavela, J.Maniks: Interface Science, 2002, 10[1], 21-6