Abstract
The structure, Young’s modulus defect, and internal friction in aluminum-germanium alloys have been studied under conditions of longitudinal elastic vibrations with a strain amplitude in the range of 10−6−3 × 10−4 at frequencies about 100 kHz. The ribbon-shaped samples of the alloys with the germanium content from 35 to 64 wt % have been produced by drawing from the melt by the Stepanov method at a rate of 0.1 mm/s. It has been shown that the dependences of the Young’s modulus defect, logarithmic decrement, and vibration stress amplitude on the germanium content in the alloy at a constant strain amplitude have an extremum at 53 wt % Ge. This composition corresponds to the eutectic composition. The dependences of the Young’s modulus defect, the decrement, and vibration stress amplitude at a constant microstrain amplitude have been explained by the vibrational displacements of dislocations, which depend on the alloy structure.
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Original Russian Text © B.K. Kardashev, B.N. Korchunov, S.P. Nikanorov, V.N. Osipov, V.Yu. Fedorov, 2014, published in Fizika Tverdogo Tela, 2014, Vol. 56, No. 7, pp. 1312–1315.
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Kardashev, B.K., Korchunov, B.N., Nikanorov, S.P. et al. Elasticity, anelasticity, and microplasticity of directionally crystallized aluminum-germanium alloys. Phys. Solid State 56, 1363–1367 (2014). https://doi.org/10.1134/S1063783414070191
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DOI: https://doi.org/10.1134/S1063783414070191