Severe deformation, annealed and thermal cycling are employed on Pb/Sn
eutectic alloy. The cycling was carried out between room temperature
and 140 degrees C, and the cycling number ranged from 0 to 1300 cycles
. Microstructural studies revealed that grain sire and volume fraction
were increased by thermal cycling. The morphology of lamellar structu
re changed to spherical structure by severe deformation and annealing.
No effect of thermal cycling on morphology was observed. The dimensio
nal change after cycling was anisotropic; the length expanded, whereas
the width and thickness shrank. These changes in dimensions are attri
buted to elastic and plastic strains, and / or creep strain. Prelimina
ry tensile test measurements showed that ''m''-value decreased by cycl
ing. Also, total ductility decreased. These are due to the increase in
both grain size and volume fraction.