Effect of surface layer depth on fatigue life of carburized steel and analysis of fracture process (original) (raw)

Nowadays, it has been strongly required to extend the fatigue life of machine components and structures due to economic. To meet this demand, various surface refining processes have become major interest because they can provide additional surface properties such as high strength, thermal barrier, corrosion and wear resistance to structural materials. One of the most commonly used refining techniques is carburizing. The depth of carburized layer is one of the most important parameters determining fatigue endurance of machine components. This work deals with fatigue life dependence on carburized layer depth. Introduction In materials science, fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. The nominal maximum stress values are less than the ultimate tensile stress limit, and may be below the yield stress limit of the materials. Fatigue occurs when a material is subjected to repeated loading and unloading. If the l...