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In situ synchrotron X-ray diffraction of the martensitic transformation in superelastic Ti-27Nb and NiTi alloys: a comparative study

Abstract : In this study, the stress-induced martensitic transformations occurring in superelastic NiTi and Ni free titanium Ti-27Nb alloys were investigated by in situ synchrotron X-ray diffraction analyses during tensile tests. It was observed a direct β to α” martensitic transformation in the Ti-27Nb alloy while the intermediate R-phase was clearly observed to be stress-induced prior the B19’martensitic phase in the case of the NiTi.
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Lorène Héraud, Philippe Castany, Denis Lailllé, Thierry Gloriant. In situ synchrotron X-ray diffraction of the martensitic transformation in superelastic Ti-27Nb and NiTi alloys: a comparative study. Materials Today: Proceedings, Elsevier, 2015, International Conference on Martensitic Transformations, ICOMAT-2014, 2, Supplement 3, pp.S917--S920. ⟨10.1016/j.matpr.2015.07.431⟩. ⟨hal-01231171⟩

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