Co_(41)Ni_(33)Al_(26) alloy ribbons with a thickness about 0.2mm were fabricated by hot rolling and cold rolling processes.After
heattreated at 1350℃ for 5 hours and then water quenched,the structure of the ribbons matrix phase converted to bamboo-liked recrystallized large grains.
Martensitic transformation and
damping capacity of Co_(41)Ni_(33)Al_(26) alloy ribbons were investigated by means of differential scanning calorimetry(DSC) and dynamic mechanical spectroscopy(DMS) separately.It was found that the martensitic transformation temperature of 0.2mm thickness ribbons is about 45℃ higher than that of 1.5mm thickness plate.During cooling process,there is a damping peak appearing at the temperature from 140℃ to 25℃ which is obviously wider than its martensitic transformation temperature(121～78℃) measured by means of DSC.It is suggestsed that some stress-induced martensitic transformations took place.The damping capacity of Co_(41)Ni_(33)Al_(26) alloy ribbon is over 0.04 corresponding to a wide temperature range,indicating that the alloy is a new kind of promising damping material.