Abstract
The feasibility of obtaining a self-lubricating composite material of the Al–Sn system with the alloyed matrix by the liquid-phase sintering of compacts obtained from the mixture of powders of the eutectic Al–12Si alloy and tin powders was investigated. The porosity of the raw compacts was ~10%; the strength of the sintered Al–12Si–xSn composites was significantly lower as compared with the additive value. The porosity of compacts decreased and the strength reached the theoretical value after additional hot densification of the sintered samples at 200 and 250°C (lower and higher than the tin melting point). The plasticity of composites under compression after densification increased as well and showed its maximum in the composite with 10–20% Sn. Analysis of the compression curves showed that, for the sintered composites, the long linear stage of plastic flow with a low coefficient of strain hardening is a characteristic feature. With the increase in the tin content, the stage of the linear flow shortens and with the 40% Sn concentration disappears. The transcrystalline localized flow and material cracking is observed before fracture.
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REFERENCES
Alieva, S.G., Altman, M.B., Ambartsumyan, S.M., et al., Promyshlennye alyuminievye splavy (Industrial Aluminum Alloys), Moscow: Metallurgiya, 1984.
Belov, V.D., Piston silumins, Vestn. Magnitogorsk. Gos. Tekh. Univ. im. G.I. Nosova, 2005, no. 1 (9), pp. 32–34.
Bushe, N.A., Dvoskina, V.A., Rakov, K.M., and Gulyaev, A.S., Podshipniki iz alyuminievikh splavov (Bearings from Aluminum Alloys), Moscow: Transport, 1974.
Abed, E.J., Study of solidification and mechanical properties of Al–Sn casting alloys, Asian Trans. Eng., 2012, vol. 2, no. 3, pp. 89–98.
Kingery, W.D., Densification during sintering in the presence of a liquid phase, J. Appl. Phys., 1959, vol. 30, no. 3, pp. 301–306.
German, R.M., Powder Metallurgy and Particulate Materials Processing: The Processes, Materials, Products, Properties and Applications, Princeton, NJ: Metal Powder Ind., 2005.
Straumal, B., Molodov, D., and Gust, W., Grain boundary wetting phase transitions in the Al–Sn and Al–Sn–Pb systems, Mater. Sci. Forum, 1996, vols. 207–209, pp. 437–440.
Rusin, N.M., Skorentsev, A.L., and Gurskikh, A.V., Effect of copper additives on mechanical and tribotechnical properties of sintered composites Al–Sn, Key Eng. Mater., 2016, vol. 685, pp. 295–299.
Goudar, D.M., Srivastava, V.C., Rudrakshi, G.B., Raju, K., and Ojha, S.N., Effect of tin on the wear properties of spray formed Al–17Si alloy, Trans. Indian Inst. Met., 2015, vol. 68, no. 1, pp. 3–7. https://doi.org/10.1007/s12666-015-0573-1
Song, K.Q., Lu, Z.C., Zhu, M., Hu, R.Z., and Zeng, M.Q., A remarkable enhancement of mechanical and wear properties by creating a dual-scale structure in an Al–Sn–Si alloy, Surf. Coat. Technol., 2017, vol. 325, pp. 682–688.
Gurskikh, A.V., Rusin, N.M., and Skorentsev, A.L., Contact alloying of D16 alloy with tin-based melts, Izv. Vyssh. Uchebn. Zaved., Fiz., 2015, vol. 58, no. 6-2, pp. 59–64.
Apykhtina, I.V., Bokshtain, B.S., Petelin, A.L., Rakov, S.V., and Rodin, A.O., Formation and growth of grooves during liquid-metal etching along the grain boundary in metals, Poverkhn.: Rentgenovskie, Sinkhrotronnye Neitr. Issled., 2005, no. 5, pp. 52–56.
Dolgopolov, N.A., Petelin, A.L., Rakov, S.V., and Simanov, A.V., Penetration of liquid tin along grain boundaries and triple grain-boundary junctions of aluminum, Russ. J. Non-Ferrous Met., 2007, vol. 48, no. 2, pp. 126–130.
Liu, X., Zeng, M.Q., Ma, Y., and Zhu, M., Wear behavior of Al–Sn alloys with different distribution of Sn dispersoids manipulated by mechanical alloying and sintering, Wear, 2008, vol. 265, pp. 1857–1863.
Liu, X., Zeng, M.Q., Ma, Y., and Zhu, M., Melting behavior and the correlation of Sn distribution on hardness in a nanostructured Al–Sn alloy, Mater. Sci. Eng., A, 2009, vol. 506, pp. 1–7.
Rusin, N.M. and Skorentsev, A.L., Obtaining of strength Al–Sn composites with high content of second phase by sintering, Izv. VUZov, Poroshk. Metall. Funkts. Pokrytiya, 2017, no. 1, pp. 20–28.
Missol, W., Energia Powierzchni Rozdziału faz w Metalach, Katowice: Slàsk, 1975.
Kozlov, E.V., Glezer, A.M., Koneva, N.A., Popova, N.A., and Kurzina, I.A., Osnovy plasticheskoi deformatsii nanostrukturnykh materialov (Introduction to Plastic Deformation of Nanostructured Materials), Moscow: Fizmatlit, 2016.
Koneva, N.A., Plastic deformation stages, Sorosovskii Obraz. Zh., 1998, no. 10, pp. 99–105.
Koneva, N.A., Kozlov, E.V., and Popova, N.A., Influence of size of grains and fragments on dislocation density in metallic materials, Fundam. Probl. Sovrem. Materialoved., 2010, vol. 7, no. 1, pp. 64–70.
Backofen, W.A., Deformation Processing, Reading, Ma: Addison-Wesley, 1972.
Rybin, V.V., Bol’shie plasticheskie deformatsii i razrushenie metallov (Large Plastic Deformations and Destruction of Metals), Moscow: Metallurgiya, 1986.
Honeycomb, R.W.K., The Plastic Deformation of Metals, London: Edward Arnold, 1968.
ACKNOWLEDGMENTS
This work was carried out in the framework of the Fundamental Research Program of the Russian Academy of Sciences for 2017–2020 (program no. III.23.2) under the partial financing of the Russian Foundation for Basic Research, project no. 16-08-00603-a.
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Rusin, N.M., Skorentsev, A.L. Features of the Plastic Flow of Sintered Al–12Si–xSn Alloys. Inorg. Mater. Appl. Res. 10, 682–690 (2019). https://doi.org/10.1134/S2075113319030377
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DOI: https://doi.org/10.1134/S2075113319030377