Effect of surface residual stress and loading tape on very high cycle fatigue properties of clean spring steel

摘要

In recent years,many unexpected failures in the very high cycle regime beyond 107 cycles have been reported for the machinery parts made of ferrous metals which are assumed to havea distinct fatigue limit.The study on very high cycle fatigue properties of structural materials has become an important and active subject to ensure the long-term safety of actual mechanical structures.In this paper,the effect of surface residual stress and loading type on very high cycle fatigue properties of a clean spring steel SUP7-386 was experimentally studied.