超声冲击改善P355NL1钢焊接接头腐蚀疲劳性能研究

王永祥, 何柏林, 李力

Improvement of Corrosion Fatigue Performance of P355NL1 Steel Welded Joint by Ultrasonic Impact

WANG Yongxiang, HE Bolin, LI Li

图4 超声冲击后表层塑变层形貌

Fig.4 Microstructures of plastic deformation layer formed by ultrasonic impact: (a) whole layer, (b) upper layer, (c) lower layer