Influence of Temperature of Severe Plastic Deformation and Aging on Microstructure, Mechanical Properties and Electrical Conductivitiy of the Cu-Cr-Zr Alloy

Abstract:

The article studies an influence of temperature of severe plastic deformation (SPD) and post-deformation heat treatment on microstructure, mechanical properties and thermal stability of the Cu-0.5Cr-0.2Zr alloy. The results demonstrate that strength is considerably increased to 900 MPa by high pressure torsion (HPT) at room temperature. Subsequent ageing at 450 °С during 1 hour leads to a decay of solid solution and an allocation of dispersion particles that further incrises strength to 900 MPa, restores electrical conductivity to 70% IACS (International annealed copper standard) and enhances thermal stability of the alloy. When deformation temperature is increased to 300°С, strength is 690 MPa that is lower than in the case of deformation at room temperature that is related to reversion process at deformation. Additional a aging does not lead to an increase of strength characteristics.

• Periodical: Defect and Diffusion Forum (Volume 385)
• Pages: 273-277
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.385.273
• Online since: July 2018
• Authors: Elena Sarkeeva*, Marina M. Abramova, Igor V. Alexandrov
• Keywords: Copper Alloys, Properties, Severe Plastic Deformation, Structure

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