The effect of the melt spinning processing parameters on the solidification structures in Ti–30 at.% Ni–20 at.% Cu shape memory alloys

Solidification structures and shape memory characteristics of Ti–30 at.% Ni–20 at.% Cu alloy ribbons prepared by melt spinning were investigated by means of differential scanning calorimetry and X-ray diffraction. In these experiments particular attention has been paid to change the ejection temperature of the melt from 1350 to 1500 °C and the velocity of cooling wheel from 33 to 55 m/s. Then the cooling rates of ribbons were controlled. The effect of this cooling rate on solidification structures and martensitic transformation behaviors is discussed.