Influence of rolling deformation on the structural and mechanical properties of TiNiFe shape memory alloys

The influence of rolling deformation and heat treatment temperature on structures, mechanical properties is studied. The results of X-ray diffraction (XRD) show that preferred orientation is found in the direction of rolling in Ti₅₀Ni₄₇Fe₃ alloy. The grain size of Ti₅₀Ni₄₇Fe₃ alloy becomes smaller as deformation of rolling increases, but grows bigger while temperature of heat treatment rises. The fracture strength becomes higher while the deformation of Ti₅₀Ni₄₇Fe₃ alloy increases or the temperature of heat treatment lowers.