For the example of lead-based alloys, the nature of the grain-surface distortion and its contribution to the deformation in the high-temperature creep of polycrystals is investigated. It is shown that quasiviscous flow associated with nondiffusional motion of atoms in conditions of a strongly excited state of the crystal makes a definite contribution to the distortion of the initially plane grain surface. The development of this deformation mechanism is facilitated by a high test temperature, motion of the grain as a whole in the deforming polycrystal, and the presence of boundary-seeking impurities with strongly different atomic volumes in the alloy in comparison with the base metal.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 47–52, December, 1988.
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Novoselova, E.M., Elsukova, T.F., Olemskoi, A.I. et al. Quasiviscous mass transfer in the high-temperature creep of polycrystals. Soviet Physics Journal 31, 992–996 (1988). https://doi.org/10.1007/BF01101169
- Mass Transfer
- Excited State
- Base Metal
- Test Temperature
- Deformation Mechanism