Influence of tin additions on the precipitation processes in a Cu-Ni-Zn alloys

Authors

  • Eduardo C. Donoso Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Ciencia de los Materiales
  • Mª Jesús Diánez Instituto de Ciencias de Materiales de Sevilla, CSIC, Centro Mixto Universidad de Sevilla-CSIC
  • José M. Criado Instituto de Ciencias de Materiales de Sevilla, CSIC, Centro Mixto Universidad de Sevilla-CSIC
  • Rodrigo Espinoza Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Ciencia de los Materiales
  • Edgar Mosquera Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Departamento de Ciencia de los Materiales

DOI:

https://doi.org/10.3989/revmetalm.060

Keywords:

Calorimetry, Cu-Ni-Zn alloys, Cu-Ni-Zn-Sn alloys, Kinetic, Precipitation hardening

Abstract


The influence of 1.1 wt% tin additions on the precipitation hardening of Cu-11 wt% Ni-20 wt% Zn alloy was studied by Differential Scanning Calorimetry (DSC), microhardeness measurements and High Resolution Transmission Electron Microscopy (HRTEM). The calorimetric curves, in the range of temperatures analyzed, show the presence of two exothermic reactions in the ternary alloy, associated to the short-range-order development assisted by migration of excess vacancies. On the other hand, one exothermic and one endothermic reaction are observed in the quaternary alloy, associated to the formation and dissolution of Cu2NiZn precipitates, respectively. It has been show that an addition of 1.1% tin plays an important role in the formation of Cu2NiZn precipitates, responsible for the precipitation hardening of the ternary alloy.

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Published

2016-03-30

How to Cite

Donoso, E. C., Diánez, M. J., Criado, J. M., Espinoza, R., & Mosquera, E. (2016). Influence of tin additions on the precipitation processes in a Cu-Ni-Zn alloys. Revista De Metalurgia, 52(1), e060. https://doi.org/10.3989/revmetalm.060

Issue

Vol. 52 No. 1 (2016)

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