Mécanismes d'amorçage et de propagation de fissures dans un alliage à mémoire de forme de type TiNi

TL;DRAbstract

Shape memory alloys are fascinating materials. Contrary to usual metallic alloys, they exhibit very specific thermo-mechanical behaviors. It is essential to have phenomenological models representing as well as possible fatigue thermo-mechanical behavior. To do that, understanding physical mechanisms governing the cyclic behavior and leading to the degradation is a necessary step. The aim of this study is to detect fatigue crack initiation and propagation stages, and to link observations with cyclic behavior.

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