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

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 analyze the surface integrity influence on fatigue properties. The self-heating method under cyclic loading quickly determine properties by coupling them intrinsic dissipation. Investigations dissipation mechanisms of coating substrate enable develop models. That first step build a lifespan forecast model based temperature measurement study shot-peening