Abstract
The features of diffuse X-ray scattering from samples of the superplastic Pb-62% Sn alloy, (i) subjected to preliminary compression by ∼75% and (ii) deformed at room temperature under the conditions optimal for superplastic flow, have been studied. The diffuse peaks revealed are due to the occurrence of short-range stratification in the alloy crystal structure during superplastic deformation. It is found that the superplastic deformation is accompanied by the outflow of Pb atoms from the surface layers, enriched in lead under preliminary compression, to the sample bulk. The formation of viscous amorphous interlayers at grain boundaries under compression facilitates superplastic flow.
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Original Russian Text © V.F. Korshak, A.P. Kryshtal’, P.V. Mateychenko, A.F. Sirenko, 2007, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2007, Vol. 71, No. 12, pp. 1723–1727.
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Korshak, V.F., Kryshtal’, A.P., Mateychenko, P.V. et al. Strain-induced structural and phase transitions in superplastic eutectic. Bull. Russ. Acad. Sci. Phys. 71, 1680–1684 (2007). https://doi.org/10.3103/S1062873807120064
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DOI: https://doi.org/10.3103/S1062873807120064