The effect of heat treatment on the mechanical behavior of an ASTM-F2063 nitinol stent intended for venous application

Achref Sallami (1) , Pierrick Malecot (1) , Fabrice Richard (1) , Michaël Fontaine (1) , Arnaud Lejeune (1) , Sebastien David (2) , Paul Vescovo (2) , Christophe Moureaux (2) , Philippe Stempflé (1)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 CISTEO MEDICAL

Super elastic nitinol is an adaptive material belonging to the shape memory alloys (SMA) family. This material can reach a higher level of deformation and has the ability to return to its initial configuration by a simple discharge. This specific behavior and its biocompatibility favor the use of this material in the medical field with numerous applications. Among the best known medical applications of superelastic nitinol are self-expanding stents. In this work, the effect of heat treatment on the behavior of an ASTM-F2063 biomedical nitinol is studied. The main objectives of this work are, on the one hand, to maximize the superelastic capacity of the stent in order to avoid irreversible plastic slippage and to minimize the stiffness of the stent in order to limit the pressure on the diseased venous system and, on the other hand, to identify the parameters of the material’s constitutive law in order to simulate the behavior of the stent under mechanical loading.

Domaines: Sciences de l'ingénieur [physics]

Achref Sallami, Pierrick Malecot, Fabrice Richard, Michaël Fontaine, Arnaud Lejeune, et al.. The effect of heat treatment on the mechanical behavior of an ASTM-F2063 nitinol stent intended for venous application. E-MRS 2023 Spring Meeting, May 2023, Strasbourg, France. ⟨hal-04576558⟩