PSI - Issue 57

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 57 (2024) 395–403

Fatigue Design 2023 (FatDes 2023) High Cycle Fatigue Performance of Bare 300M Steel by Self Heating Tests Under Cyclic Loadings Pierrick Lepitre a,b, *, Cédric Doudard a , Matthieu Dhondt a , Martin Surand b , Sylvain Calloch a

a ENSTA Bretagne, IRDL – UMR CNRS 6027, 2 Rue François Verny, 29200 Brest, France b Safran Landing Systems, 7 Rue Général Valérie André, 78140 Vélizy-Villacoublay, France

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers After implanting and validating a test and post-processing protocol, a self-heating model has been applied. The model shows a good description of the self-heating curve and a great correlation with conventional fatigue data. Mean properties as its scattering have been determined by self-heating tests. Then, geometric and loading parameters have been tested, such as the loading ratio and the coupon volume, showing various influence on self-heating curves. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers Keywords: High Cycle fatigue; Self-Heating; Ultra High Tensile Strength Steel Abstract 300M, an ultra-high strength steel used in aeronautics for landing gears, is generally shot-peened and coated with High Velocity Oxygen Fuel sprayed WC-10Co-4Cr to improve corrosion resistance and tribological behavior. In the literature, few process parameters have been tested to characterize the effect of surface integrity on fatigue properties. The self-heating method under cyclic loadings is used to quickly determine fatigue properties by coupling the fatigue mechanisms with dissipation mechanisms. This paper focusses on the methodology and results obtained on bare 300M.

* Corresponding author. Tel.: +33 6 74 72 07 96. E-mail address: pierrick.lepitre@ensta-bretagne.org

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2023 organizers 10.1016/j.prostr.2024.03.042