Journal
SCRIPTA MATERIALIA
Volume 222, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2022.115035
Keywords
Shape memory alloys (SMA); Titanium alloys; Mechanical properties testing; X-ray diffraction
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Ti-Nb based alloys are commercially important due to their damping capabilities. The consistency of the starting microstructure affects the reversibility of the transformation. The thickness of the material influences the microstructures and behaviors, with a single-phase layer in thin material promoting more recoverable transformation behavior.
Ti-Nb based alloys are of commercial importance due to their damping capabilities via a superelastic trans-formation. However, the starting microstructure of these alloys is often not consistent between studies, even when produced via a nominally comparable methodology, which has the potential to limit the reversibility of the transformation. As such, samples were produced to investigate whether the thickness of the material influenced the microstructures and behaviours seen. It was shown that a single-phase layer exists close to the surface of a two-phase microstructure, and that in very thin material, this can span across the whole sample, promoting more recoverable transformation behaviour. This is important as it not only rationalises discrepancies in the literature, but may also influence component geometries necessary for industrial application.
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