Conclusions
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1.
Natural and artificial aging cause approximately the same linear contractions in specimens of zinc alloy TsAM 4-1. Sub-zero treatment retards the change.
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2.
450 days' natural aging of castings causes their dimensions to decrease by 0.11–0.12%, mostly in the first month; the shrinkage is eventually complete in 45 days.
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3.
There is a 0.12–0.14% decrease in dimensions of specimens in the first six hours of aging at 80–120°C (175–250°F) with no later changes.
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4.
It is recommended that castings of this alloy, for which the tolerances are particularly close, should be naturally aged for 45 days or artificially aged for six hours at 80–100°C (175–210°F).
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5.
Oxidizing the alloy immediately after casting decreases its dimensions by 0. 03% but causes no change of dimensions in castings already aged.
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Adel'skaya, F.S., Chernova, P.L. Aging of the zinc alloy TsAM 4-1. Met Sci Heat Treat 1, 59–60 (1959). https://doi.org/10.1007/BF00807929
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DOI: https://doi.org/10.1007/BF00807929