Influence of Thermomechanical Treatment on Transformation Temperatures of Cu-Al-Ni Shape Memory Alloys

Ana Cris R. Veloso; Rodinei Medeiros Gomes; Dagoberto Brandão Santos; I.C.E.G. Lima; Severino Jackson Guedes de Lima; Tadeu Antonio de Azevedo Melo

doi:10.4028/www.scientific.net/AST.59.92

Paper Titles

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Two-Way Memory Effect in NiTi Shape Memory Alloys
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Engineering Aspects of Shape Memory Film Actuators and Sensors
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Influence of Thermomechanical Treatment on Transformation Temperatures of Cu-Al-Ni Shape Memory Alloys

Abstract:

In this study Cu-13.8Al alloys with 3.0% and 4.0% (wt%) of nickel were obtained by induction melting. The effect of homogenization heat treatment and hot rolling on the transformation temperatures of these alloys was investigated by differential scanning calorimetry. It was observed that the transformation temperatures increase with long homogenization times, and also by hot rolling, and this displacement is smaller for alloys with 4.0% of nickel. In both alloys in the quenched state, the reversion reaction is characterized by the appearance of multiple peaks attributed to the presence of martensites 2H and 18R. The influence of the rolling process must be associated with the loss of Ni and Al during the process.