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Effect of chromium content on precipitation in Cu–Cr–Zr alloys

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Abstract

The phase content and the strengthening of two copper alloys, 0.1Cr–0.1Zr and 0.9Cr–0.1Zr, subjected to aging treatments were studied. The size of second phase particles and the strengthening mechanism depended remarkably on the chromium content. The strengthening of the 0.9Cr–0.1Zr alloy in the peak aged conditions was mainly attributed to the uniform dispersion of tiny shearable Cr-rich particles with a size of about 3–4.5 nm and the Nishiyama–Wassermann orientation relationship. In contrast, the microstructure of the peak aged conditions of the 0.1Cr–0.1Zr alloy was characterized by the dispersion of relatively large Cr particles with a size of about 8–10 nm, which resulted in the strengthening accordingly Orowan mechanism. The reasons for the difference in the decomposition of the supersaturated solid solution and the morphology of particles are discussed.

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Acknowledgements

The financial support received from Russian Science Foundation under Grant No. 21-79-00062 (https://rscf.ru/en/project/21-79-00062/) for financial support is gratefully acknowledged. The work was carried out using the equipment of the Joint Research Center of Belgorod National Research University «Technology and Materials».

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  1. Belgorod State University, Pobeda str. 85, Belgorod, 308015, Russia

    Anna Bodyakova, Roman Mishnev, Andrey Belyakov & Rustam Kaibyshev

  2. National University of Science & Technology (MISIS), Leninsky pr. 4, Moscow, 119049, Russia

    Anna Bodyakova

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AB and RM were involved in investigation. AB and AB were involved in data curation and writing—original draft. RM was involved in formal analysis and methodology. RK collected resources and performed supervision and project administration.

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Correspondence to Anna Bodyakova.

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Bodyakova, A., Mishnev, R., Belyakov, A. et al. Effect of chromium content on precipitation in Cu–Cr–Zr alloys. J Mater Sci 57, 13043–13059 (2022). https://doi.org/10.1007/s10853-022-07454-8

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