How a new strain transformable titanium-based biomedical alloy can be designed for balloon expendable stents - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Materialia Année : 2020

How a new strain transformable titanium-based biomedical alloy can be designed for balloon expendable stents

Résumé

Although largely used for numerous medical devices, the current titanium medical grades are not adapted for the manufacture of balloon expandable vascular stents due to their low plastic deformation abilities compared to stainless steels and cobalt-chromium alloys. In this study, a new biocompatible Ti-16Nb-8Mo alloy (wt.%) was designed with the objective to obtain large ductility and high strain hardening. In the alloy, a massive twinning and strain-induced martensitic transformation were observed to accommodate the plastic deformation leading to a very large plastic deformation since more than 45% of elongation at fracture were reached by tensile test. This huge plasticity, unusual for titanium alloys, is due to a complex deformation mechanism implying TWinning Induced Plasticity (TWIP) and Transformation Induced Platicicy (TRIP) effects, which were particularly investigated in such strain transformable alloy by electron backscattering diffraction (EBSD), by transmission electron microscopy (TEM) and by in-situ tensile test under synchrotron beam (SXRD). © 2020 Acta Materialia Inc.
Fichier principal
Vignette du fichier
Gordin et al-2020-How a new strain transformable titanium-based biomedical alloy can be designed.pdf (1.08 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02536605 , version 1 (15-04-2020)

Identifiants

Citer

D.M. Gordin, F. Sun, D. Laillé, F. Prima, T. Gloriant. How a new strain transformable titanium-based biomedical alloy can be designed for balloon expendable stents. Materialia, 2020, 10, pp.100638. ⟨10.1016/j.mtla.2020.100638⟩. ⟨hal-02536605⟩
44 Consultations
68 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More