Cinétiques d’endommagement à différentes échelles d’un acier austénitique inoxydable en fatigue à amplitude constante et variable

Abstract : This study focuses on the characterization of plastic fatigue damage process of an austenitic stainless steel. The aim is to clarify the nature and proportions of the different stages of damage in the life of the material. Interrupted fatigue tests were established to monitor the evolution of the damage and to propose a description. At each stop, surface observations were performed for different amplitudes total strain. These observations have been completed by monitoring acoustic emission. Fatigue tests under constants amplitudes loading highlight three stages of damage. A model was proposed and compared to results obtained in fatigue under variables amplitudes loading.
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Ammar Ould Amer. Cinétiques d’endommagement à différentes échelles d’un acier austénitique inoxydable en fatigue à amplitude constante et variable. Mécanique des matériaux [physics.class-ph]. ENSTA ParisTech, 2014. Français. ⟨tel-01146223⟩

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