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Experimental study of a CoCrMo alloy treated by SMAT under rotating bending fatigue

Brasileiro, Lucas and Sun, Zidan and Mabru, Catherine and Chieragatti, Rémy and Proust, Gwenaelle and Retraint, Delphine Experimental study of a CoCrMo alloy treated by SMAT under rotating bending fatigue. (2022) Procedia Structural Integrity, 38. 283-291. ISSN 2452-3216

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Official URL: https://doi.org/10.1016/j.prostr.2022.03.029


The main objective of this work is to understand the fundamental damage mechanisms involved in a SMAT treated CoCrMo alloy subjected to fatigue under rotating bending loads. For this purpose, different load amplitudes in rotating bending are imposed on cylindrical specimens, in as-machined and SMAT states. Different material characterizations are performed in order to determine which features play an important role in fatigue life of the studied alloy. Such characterizations are done via digital microscopy, electron backscatter diffraction (EBSD), roughness measurements and microhardness tests. The fatigue results presented in the form of S-N diagram show that SMAT with a moderate intensity (SMAT-2) can enhance the fatigue performance of the CoCrMo alloy, whereas SMAT with a higher intensity (SMAT-3) seems to deteriorate it. This fatigue life decrease is probably due to surface micro-cracks generated by an over-peening phenomenon.

Item Type:Article
Additional Information:This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0)
HAL Id:hal-03612005
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Technologie de Troyes - UTT (FRANCE)
Other partners > University of Sydney (AUSTRALIA)
Laboratory name:
FEDER - Région Grand-Est
Deposited On:07 Feb 2023 08:56

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