Ni–48.5at%Ti thin films were irradiated in the austenite phase by different energy-level protons at a dose rate of 1.85 × 1012 p/(cm2·s), and the total dose was 2.0 × 10¹⁶ p/cm². The microstructures of the thin films before and after irradiation were evaluated by transmission electron microscopy (TEM) and grazing-incidence X-ray diffraction (GIXRD), which showed that the volume fraction of Ti₃Ni₄ phase elevated with proton energy level. The influence of proton irradiation on the transformation behavior of the TiNi thin films was investigated by differential scanning calorimetry (DSC). Compared with the unirradiation film, the reverse transformation start temperatures (A_s) decreased by about 3°C after 120 keV proton-irradiation. The proton irradiation also had a significant effect on the mechanical properties of the TiNi thin films. After 120 keV energy proton-irradiation, the fracture strength increased by 8.44%, and the critical stress increased by 21.1%. In addition, the nanoindenter measurement image showed that the hardness of the thin films increased with the increase of proton-irradiation energy. This may be due to the defects caused by irradiation, which strengthen the matrix.

Ni–48.5at％Ti薄膜通过不同能级的质子以1.85×1012 p /（cm2·s）的剂量率在奥氏体相中辐照，总剂量为2.0×10 ¹⁶ p / cm ²。通过透射电子显微镜（TEM）和掠入射X射线衍射（GIXRD）评价了辐照前后薄膜的微观结构，结果表明Ti ₃ Ni ₄相的体积分数随质子能级的升高而提高。通过差示扫描量热法（DSC）研究了质子辐照对TiNi薄膜相变行为的影响。与未照射膜相比，逆转变开始温度（A _s120 keV质子辐照后）降低了约3°C。质子辐照对TiNi薄膜的机械性能也有重要影响。120 keV能量质子辐照后，断裂强度提高了8.44％，临界应力提高了21.1％。另外，纳米压痕测量图像表明，薄膜的硬度随着质子辐照能量的增加而增加。这可能是由于辐照引起的缺陷，从而增强了基体。