Influence of Surface Integrity and Coating on the High Cycle Fatigue Properties of 300M Steel from Self-Heating Tests under Cyclic Loads

P. Lepitre (1, 2) , S. Calloch (2) , Cédric Doudard (2) , Matthieu Dhondt (2) , M. Surand (1)

1 SAFRAN Landing Systems
2 IRDL - Institut de Recherche Dupuy de Lôme

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 tribological behavior. In literature, few treatment parameters have been tested to analyze the surface integrity influence on fatigue properties. The self-heating method under cyclic loading is used to quickly determine fatigue properties by coupling them with intrinsic dissipation. Investigations on dissipation mechanisms of coating and substrate enable to develop self-heating models. That is the first step to build a lifespan forecast model based on temperature measurement to study shot-peening and coating influence on fatigue properties.

Mots clés: Coatings; Cyclic loads; Fatigue testing; High strength steel; Temperature measurement

Domaines: Matériaux; Matériaux et structures en mécanique [physics.class-ph]

P. Lepitre, S. Calloch, Cédric Doudard, Matthieu Dhondt, M. Surand. Influence of Surface Integrity and Coating on the High Cycle Fatigue Properties of 300M Steel from Self-Heating Tests under Cyclic Loads. 6th CIRP Conference on Surface Integrity, CSI 2022, Jun 2022, Lyon, France. pp.37-42, ⟨10.1016/j.procir.2022.03.012⟩. ⟨hal-03761317⟩