Abstract
The effect of bismuth on the microstructure of ultrafast-quenched foils of Sn-Bi alloys has been investigated. Bismuth phase precipitation is observed in alloys containing more than 2 at % Bi. With an increase in the bismuth concentration to 8 at %, most precipitates acquire a needle-like shape. Cross-sectional inhomogeneity of the initial foils is revealed. It is found that addition of bismuth leads to an increase in the foil microhardness by a factor of 2.5.
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