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International audienceTi-Nb based alloys are well known to their good mech. properties, shape memory effect, superelasticity, as well as good biocompatibility. Our study is focused on the improvement of their mech. properties by adding alloying element such as oxygen or nitrogen. Superelasticity was drastically improved by addn. of a few amt. (at 0.5%) of oxygen or nitrogen. Martensitic transformation between the β parent phase (austenite) and α" product phase (martensite), responsible for the superelastic property, has been extensively studied by dynamic mech. anal. and in-situ tensile test under X-ray synchrotron diffraction. [on SciFinder(R)

Elaboration et caractérisation d'alliages de type Ti-Nb-X (X=O, N) pour des applications biomédicales