Influence of loading conditions on a fatigue endurance for components with wear-resistant coatings
An influence of different force factors on fatigue parameters of steel components with thermal spray powder wear-resistant coatings on the Nickel-Chrome base is studied. The results of a comparative analysis of fatigue resistance characteristics for coated and uncoated cylindrical steel specimens under the action of an alternative push-pull and torsion are adduced. The method of a conducting of cyclical tests for spring steel right-angled specimens under four-point bending is described. Some lowering of a fatigue endurance of components due to brittle character of a surface fracture is shown. For the purpose of ensuring a given service life of structures some recommendations on making a compromise between different failure mechanisms are proposed.