Dynamic mechanical response of a Ni45.7Ti29.3Hf20Pd5 alloy
Dynamic mechanical response of a Ni45.7Ti29.3Hf20Pd5 alloy
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DOI：
10.1016/j.msea.2015.03.023
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发表时间：
2015-05
期刊：
影响因子：
6.4
通讯作者：
E. Acar
中科院分区：
文献类型：
--
作者：
E. Acar
采用动态扫描量热法和动态力学分析技术研究了Ni45.7Ti29.3Hf20Pd5（at%）合金的相变和阻尼性能。阻尼性能表现为时效、温度循环、频率和加热速率的函数。在热弹性马氏体相变过程中，合金的最大阻尼能力为0.215，与NiTi合金相当。结果表明，在300 ~ 900℃时效1.5 h可以有效地控制合金的阻尼性能，改变合金的相变温度。ni45.7 ti29.3 hf20pd5合金的阻尼能力随加热速率增大而增大，随加热频率增大而减小。
Phase transformation and damping properties of a Ni45.7Ti29.3Hf20Pd5(at%) alloy was studied through Dynamic Scanning Calorimetry and Dynamic Mechanical Analysis techniques. Damping properties were characterized as functions of aging, temperature cycling, frequency and heating rate. The maximum damping capacity of the alloy was determined to be 0.215 during thermoelastic martensitic phase transformation, that is comparable to NiTi alloys. It was found that aging at temperatures ranging from 300 °C to 900 °C for 1.5 h was effective in controlling damping capacity of the alloy as well as altering the phase transformation temperatures. The damping capacity of the Ni45.7Ti29.3Hf20Pd5alloy increased with heating rate and decreased with frequency.