Influence of aging on transformation characteristic and phase structure of a Cu–12.4Al–1.2Ti–1.2Ta shape memory alloy
Source abstract
Abstract
The effect of aging on the properties of a Cu–12.4Al–1.2Ti–1.2Ta (wt.%) high-temperature SMA was investigated throughout SEM/EDS, XRD and DSC experiments. It was found that the transformation behavior, the thermal properties and the phase structure of the alloy remarkably changed with homogenization process performed at 900 °C for 20 min and then aging at 400 and 500 °C for 1 h. Structural and morphological investigations revealed that the homogenization process caused martensitic decomposition in the alloy and austenite phase domains remained. Afterward, with the effect of thermal aging, the amount of the austenite phase increased and the α-phase domains nucleated and grew in the alloy. At elevated aging temperature, the amounts of the austenite and the α-phases in the alloy considerably increased and martensitic morphology disappeared. As a result of these, the phase structure of the alloy affected its thermal behavior and led to exhibit irreversible one-stage martensitic transformation behavior.
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Research context
OpenAlex topics: Shape Memory Alloy Transformations · Titanium Alloys Microstructure and Properties · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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