Conclusions
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1.
With an atomic fraction of copper less than 67–68%, inclusions of pure indium are observed in the alloy.
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2.
In alloys with atomic fractions of indium less than 15% there is a series of reversible phase reactions. At 740°C β+δ⇆γ is observed, at 675°C α+δ⇆β2+δ transformation is observed, and close to 560°C eutectoid α+γ2⇆β1+α -transformation occurs.
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3.
Anomalies at 160°C in the temperature dependence curves for internal friction and electrical resistivity in alloys with an atomic fraction of indium greater than 15% are due to a change in the aggregated condition of inclusions.
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4.
An increase in the content of indium inclusions leads to deterioration of test alloy properties, in particular microhardness is H 1200–1300 (for alloy with an atomic fraction of indium of 25%), which is typical for brittle materials.
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Additional information
Voronezh Polytechnic Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 39–43, May, 1986.
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Putilin, V.V. Electrical properties and structure of alloys of the Cu−In−Al system. Met Sci Heat Treat 28, 358–362 (1986). https://doi.org/10.1007/BF00814693
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DOI: https://doi.org/10.1007/BF00814693