It has been proved by related tests (at constant force amplitude) that the fatigue strength of welded joints or structures with ultrasonic peening trea tment is improved greatly.

• 焊接接头或焊接结构经超声冲击处理后,疲劳性能得到十分显著的改善,这已被相关试验(常幅)所证实。突然超载所引起的过载效应会对超声冲击处理的效果产生一定的影响,具体情况如何,目前尚不情楚。