Microstructural and Cavitation Erosion Behavior of the CuAlNi Shape Memory Alloy

Microstructural and cavitation erosion testing was carried out on Cu-12.8Al-4.1Ni (wt. %) shape memory alloy (SMA) samples produced by continuous casting followed heat treatment consisting of solution annealing at 885 °C for 60 min and, later, water quenching. Cavitation resistance applied using a standard ultrasonic vibratory set up with stationary specimen. Surface changes during the were monitored metallographic analysis an optical microscope (OM), atomic force (AFM), scanning electron (SEM) as well weight measurements. The results revealed martensite microstructure after both Microhardness value higher quenching than in as-cast state. After 420 exposure, negligible mass loss noticed samples. Based obtained results, showed excellent resistance. Mass morphological formed pits indicated better state (L).