High-strength and high-conductivity Cu-0.7Mg-0.1Ca alloy fabricated via heat treatment and severe plastic deformation

  • Alireza Kalhor Faculty of Materials Engineering, Silesian University of Technology, Krasińskiego 8, 40-019, Katowice, Poland
  • Kinga Rodak Faculty of Materials Engineering, Silesian University of Technology, Krasińskiego 8, 40-019, Katowice, Poland
  • Hanna Myalska-Głowacka Faculty of Materials Engineering, Silesian University of Technology, Krasińskiego 8, 40-019, Katowice, Poland
  • Bartosz Chmiela Faculty of Materials Engineering, Silesian University of Technology, Krasińskiego 8, 40-019, Katowice, Poland
  • Karol Kuglarz Faculty of Materials Engineering and Industrial Computer Science, AGH University of Science and Technology, 30 Mickiewicza, 30‑059, Kraków, Poland
  • Ivo Schindler VŠB – Technical University of Ostrava, Faculty of Materials Science and Technology, 17. listopadu 2172/15, 70800 Ostrava, Czech Republic
  • Krzysztof Radwański Materials Research Group, Łukasiewicz Upper Silesian Institute of Technology, Karola Miarki 12-14, 44-100, Gliwice, Poland
  • Marian Kampik Faculty of Electrical Engineering, Silesian University of Technology, 44-100, Gliwice, Poland

Abstract


In this research, the effect of annealing in combination with severe plastic deformation (SPD) by the MaxStrain component of the Gleeble thermo-mechanical testing device on the microstructural characteristics, tensile behavior, and electrical conductivity of a Cu-0.7Mg-0.1Ca (wt%) alloy was investigated. The as-cast material was subjected to two treatments: annealing at 923 K for 15 min, followed by cooling in air, and annealing at 923 K for 75 min, followed by quenching in agitated water, which resulted in irregular and partially spheroidized Cu5Ca particles. Subsequent MaxStrain deformation resulted in a remarkable grain refinement by dynamic recrystallization (DRX), in which the annealed and quenched sample exhibited a higher DRX fraction than the annealed and air-cooled sample. As a result, the annealed and quenched samples showed a better synergy between strength and ductility, while these improvements were accompanied by only ~1% reduction in electrical conductivity. Accordingly, the present work demonstrated that annealing and subsequent SPD processing is as an effective method for processing high-strength and high-conductivity (HSHC) copper alloys.

Published
2025/07/31
How to Cite
Kalhor, A., Rodak, K., Myalska-Głowacka, H., Chmiela, B., Kuglarz, K., Schindler, I., Radwański, K., & Kampik, M. (2025). High-strength and high-conductivity Cu-0.7Mg-0.1Ca alloy fabricated via heat treatment and severe plastic deformation. Journal of Mining and Metallurgy, Section B: Metallurgy, 61(1), 43-58. Retrieved from https://www.aseestant.ceon.rs/index.php/jmm/article/view/54198
Issue
Vol. 61 No. 1 (2025)
Section
Original Scientific Paper

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