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 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.
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