CuAlNi shape memory alloy of grain size phsical properties examined

In present study, the effect of grain size on physical properties of CuAlNi shape memory alloy, was investigated. This material was obtained from TREFIMETAUX Centre de Recherche in France. The effects occured by heat treatment, of grain size on the physical properties of Cu-13.0 %Al-4 %Ni and Cu-13,5 % Al-4% Ni (wt. %) alloys were investigated by differential scanning calorimetry (DSC) technique, X-ray diffraction (XRD) microhardness measurement and metallagraphic observations. The average grain size was calculated by the optical micrographs, belonging to ASTM E-112. The crystal structure, lattice parameters and crystallographic planes of the samples were evaluated from XRD results. Transformation temperatures and enthalphy values for differens heat tereatment were determined by DSC analysis. Entrophy changes of the samples were calculated using these values. It was seen that the grain size and microhardness of the samples changed with the temperature of with heat treatment and process time