Abstract Superelastic shape memory alloys with ultra-high-strength, large mechanical hysteresis, and the ability to recover large deformations are promising materials for damping applications. In this study, the superelastic response and damping capacity of quaternary Ni45·3Ti39.7Hf10Pd5 polycrystalline alloys are investigated in terms of temperature and loading frequency dependency. It is shown that this alloy can show fully recoverable superelastic behavior with strain amplitude of 6–7% from −40 °C to 80 °C after heat treatments. The damping capacity of 550°C-3h aged alloy at 20 °C was 22.5 J/cm3 for quasi-static loading which decreased to 12.5 J/cm3 under 1 Hz loading frequency. At the high temperature of 80 °C the damping capacity was determined 9.2 J/cm3 under quasi-static loading and 4 J/cm3 under 1 Hz loading frequency. The decrease in damping capacity with loading frequency and temperature is linked to: the changes in local temperature of the specimen which significantly increases critical stress for reverse transformation while not affecting the critical stress for forward transformation, improved compatibility of transforming phases, and decrease in the contribution of superelastic strain to the total recovered strain.

中文翻译：

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NiTiHfPd形状记忆合金的加载频率和随温度变化的阻尼能力

摘要 具有超高强度、大机械滞后和恢复大变形能力的超弹性形状记忆合金是一种很有前途的阻尼材料。在这项研究中，研究了四元 Ni45·3Ti39.7Hf10Pd5 多晶合金的超弹性响应和阻尼能力与温度和加载频率的相关性。结果表明，该合金在热处理后从 -40°C 到 80°C 的应变幅度为 6-7%，可以显示出完全可恢复的超弹性行为。550°C-3h 时效合金在 20°C 时的阻尼能力为 22.5 J/cm3 准静态加载，在 1 Hz 加载频率下降至 12.5 J/cm3。在 80 °C 的高温下，准静态加载下的阻尼能力确定为 9.2 J/cm3，1 Hz 加载频率下的阻尼能力为 4 J/cm3。