The experimental results and theoretical analysis show that the high-temperature internal friction peak is evolved into an "ordinary peak" and an "inverted peak" in the alloy in the case of lower frequencies,more martensite plates and higher heating rates,which arise from the interaction between two types of martensitic variants with positive and negative loss elastic modulus.

Small amplitude oscillation shearing stress scan and frequency scan tests showed that the storage modulus and loss modulus decreased and loss angle increased with the increasing of temperature and the rheological property obviously changed.