Conclusions
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1.
The presence of more than 0.2% Fe in pure aluminum in some binary and ternary aluminum alloys affects the formation of surface areas with large crystals. This is due to the formation and irregular distribution of small particles of the secondary phase on the surface of the article during the decomposition of the supersaturated solid solution of iron in aluminum during compression and local dissolution of the excess phase during heating to the quenching temperature.
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2.
The structure with an irregular grain size formed on the surface of compressed rods during primary recrystallization has a tendency to become much rougher during the secondary recrystallization which occurs during heating to quenching temperatures.
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3.
The etchability of the potential area of large crystals on the surface in hot pressed aluminum alloys directly after compression is different from the etchability of the central region; the potential area of large crystals appears to be a matte ring.
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Literature cited
S. S. Gorelik, Yu. M. Vainblat, MiTOM (1961), No. 7.
P. Beck, M. Holzworth, P. Sperry, TAIME (1949), vol. 180.
M. Hansen, C. Anderko, Structure of Binary alloys [Russian translation], Moscow, Metallurgizdat (1962).
V. A. Livanov, V. M. Vozdvizhenskii, Trudy MATI (1958), No. 31.
V. I. Elagin, Coll: Investigation of Nonferrous Alloys, No. 3 [in Russian], Izd. AN SSSR. (1962).
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 5–8, June, 1964
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Gorelik, S.S., Kozlovskaya, V.P. & Tomilova, L.A. Effect of iron on the formation in aluminum alloys of a surface layer consisting of large crystals. Met Sci Heat Treat 6, 338–340 (1964). https://doi.org/10.1007/BF00775322
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DOI: https://doi.org/10.1007/BF00775322