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Keywords:

  • damping;
  • glass transitions;
  • martensitic transformations;
  • point defects;
  • strain glasses

Strain glass alloys exhibit novel functionalities around their glass transition temperatureT0; but T0 is too low for TiNi-based strain glass alloys, restricting their potential applications. It is thus of practical importance to develop high T0 strain glass alloys. In the present study, several ambient-temperature T0 strain glass alloys were developed, by selecting TiPd with high temperature martensitic transformation as the host alloy and doping different kinds of point defects to substitute Pd. By comparing TiPd-based and TiNi-based strain glass alloys, it is found that T0 of strain glass alloys is controlled by the martensitic transformation temperature of its host alloys without defect doping. Finally, our results suggest that strain glass alloys are also promising damping materials for applications, as their transition damping peak is insensitive to the cooling/heating rate and is also thermal hysteresis free.