Abstract Effects of aging on the microstructure, structural properties, phase components, transformation characteristics and shape memory behavior of the Cu-12Al-3Mn-0.7Ti-0.3C (wt.%) SMA have been investigated by means of SEM, XRD, DSC measurements and the bending test. The results indicate that properties of the alloy depends strongly on aging temperatures performed at 300 °C, 400 °C and 500 °C for 30 minutes. While the alloy sample aged at 300 °C has generally similar properties with the base alloy sample, as the aging temperature increases, significant changes have occurred in the microstructural properties of the alloy. After aging at 500 °C, α-phase precipitated as a result of β phase decomposition and micro voids formed in the microstructure of the alloy. It is found that these obstacles give rise to the expansion of the transformation hysteresis value of 289.3 °C for the sample aged at 500 °C by affecting transformation temperatures, the change of the thermodynamic parameters and also a decrease in shape recovery ratio of 50% of the alloy.

中文翻译：

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时效对Cu-Al-Mn-Ti-C形状记忆合金结构和形状记忆行为的影响

摘要 利用SEM、XRD、DSC研究了时效对Cu-12Al-3Mn-0.7Ti-0.3C (wt.%) SMA的显微组织、结构性能、相成分、相变特性和形状记忆行为的影响测量和弯曲试验。结果表明，合金的性能很大程度上取决于在 300 °C、400 °C 和 500 °C 下进行 30 分钟的时效温度。虽然在 300 °C 时效的合金样品与基体合金样品具有大致相似的性能，但随着时效温度的升高，合金的显微组织性能发生了显着变化。在 500 ℃时效后，α 相由于 β 相分解而析出，合金显微组织中形成微孔洞。