Abstract
Changes in the structure, hardness, mechanical properties, and friction coefficient of Al-30% Sn, Al-15% Sn-25% Pb, and Al-5% Sn-35% Pb (wt %) alloys subjected to severe plastic deformation by equal-channel angular pressing (with a force of 40 tonne) and by shear at a pressure of 5 GPa have been studied. The transition into the nanocrystalline state was shown to occur at different degrees of plastic deformation. The hardness exhibits nonmonotonic variations, namely, first it increases and subsequently decreases. The friction coefficient of the Al-30% Sn, Al-15% Sn-25% Pb, and Al-5% Sn-35% Pb alloys quenched from the melt was found to be 0.33; the friction coefficients of these alloys in the submicrocrystalline state (after equal-channel angular pressing) equal 0.24, 0.32, and 0.35, respectively. The effect of disintegration into nano-sized powders was found to occur in the Al-15% Sn-25% Pb, and Al-5% Sn-35% Pb alloys after severe plastic deformation to ɛ = 6.4 and subsequent short-time holding.
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Original Russian Text © N.I. Noskova, N.F. Vil’danova, Yu.I. Filippov, R.V. Churbaev, I.A. Pereturina, L.G. Korshunov, A.V. Korznikov, 2006, published in Fizika Metallov i Metallovedenie, 2006, Vol. 102, No. 6, pp. 693–698.
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Noskova, N.I., Vil’danova, N.F., Filippov, Y.I. et al. Preparation, deformation, and failure of functional Al-Sn and Al-Sn-Pb nanocrystalline alloys. Phys. Metals Metallogr. 102, 646–651 (2006). https://doi.org/10.1134/S0031918X06120131
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DOI: https://doi.org/10.1134/S0031918X06120131