Thermal analysis of CuMg alloys deformed by equal channel angular pressing


The thermal behavior of two copper alloys, with 0.2 and 0.5 mass % of Mg, was analyzed after severe plastic deformation processing by Equal Channel Angular Pressing (ECAP). Both alloys were forced to be passed through a 90º inner angle ECAP die at room temperature up to 16 passes following route Bc. The thermal stability was analyzed in terms of the recrystallization kinetics by using the Various Heating Rates method, derived from the Johnson–Mehl–Avrami–Kolmogorov equation, after analyzing the Differential Scanning Calorimetry peaks for both alloys at any pass of ECAP. The calculated recrystallization parameters included the activation energies (E (kJ mol−1) ECuMg02 = 42.6 ± 19.8 ECuMg05 = 52.7 ± 13 kJ mol−1) and the kinetic exponent n which took an average value of ≈ 1.75, irrespective of the considered alloy.

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The authors are grateful the Generalitat de Catalunya and the European Commission for the support provided for this research, through ACC1Ó and FEDER resources, respectively, as part of the NUCLIS (Cooperative Technological Innovation Nuclei) Programme. JMC is also grateful to CONACYT (Mexico) for partial funding his sabbatical leave in UMSNH.

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Rodríguez-Calvillo, P., Ferrer, N. & Cabrera, JM. Thermal analysis of CuMg alloys deformed by equal channel angular pressing. J Therm Anal Calorim (2020).

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  • ECAP
  • DSC
  • VHR
  • CuMg alloy
  • Thermal stability