Effect of contact pressure and cyclic stress amplitude on fretting fatigue of 45-carbon steel

Abstract：The effect of contact pressure on fretting fatigue in quenched and tempered 45-carbon steel is studied.With an increase of contact pressure, fretting fatigue life decreased quickly at low contact pressures.However, it almost unchanged at high contact pressures.With an increase of cyclic stress amplitude, fretting fatigue life decreased.In the experiment, concavity is formed at the fretted area accompanying wear.The main crack is initiated at the outer edge corner of the concavity at high contact pressures.While, it is initiated at the middle portion of the fretted area at low contact pressures.

Keyword：fretting fatigue;stress and strain field;contact pressure;fatigue life;