Anisotropy of elastic constants ofin situ Pb-Sn eutectic composite measured by pulse-echo method

Anisotropic elastic constants of Pb-Sn eutectic composites with layered structure have been measured by the pulse-echo method. The magnitude of the elastic constants was found to vary considerably depending upon the crystallographic directions as well as the directions relative to the plate-like eutectic constituents. The elastic constants of Pb-Sn eutectic bicrystal were determined taking thex1 andx3 axes, respectively, as the directions parallel to and normal to the growth direction of the eutectics. The interfacial energy of Pb-Sn layers was also determined. In addition, the anisotropy of the eutectics was confirmed by resistivity measurements.