RESIDUAL STRESSES AND FRETTING, CRACK INITIATION AND PROPAGATION

摘要: The effect of residual compressive stresses in the surface a component on resultant improvement fatigue performance is well known. Fretting which causes local wear and an efficient initiator cracks. It also may cause rise temperature. cases fretting not so straightforward as plain fatigue. Many usual methods inducing hardening, e.g. rolling, shot peening nitriding. Increased hardness tends to reduce wear. known, however, that situations where rate high, initiation cracks by prevented. Some results are presented shot-peening carbon steel austenitic stainless steel. Experiments have been designed separate hardening effects stress certain aluminium alloys Surface roughening has crack alloy. Fading under influence more rapid than normal given propagation short field.