超弹性是形状记忆合金(SMA)的重要特性之一。通过试验,研究了应变幅值和加卸载循环次数对SMA丝应力诱发马氏体相变应力、残余应变、最大相变应变和耗能能力的影响。研究结果表明,超弹性SMA丝具有良好力学性能,应变幅值对它的耗能能力具有较大的影响,循环次数的增加可使其力学性能更加稳定。 Hyperelasticity is one of the important properties of shape memory alloys (SMA). The effects of strain amplitude and loading-unloading cycles on stress-induced martensitic transformation stress, residual strain, maximum phase transformation strain and energy dissipation capacity of SMA wire were studied. The results show that super-elastic SMA wire has good mechanical properties, strain amplitude has a greater impact on its energy dissipation capacity, the increase of the number of cycles can make its mechanical properties more stable.