轴向超声振动对搅拌摩擦焊过程中金属流动行为的影响

何长树, 郄默繁, 张志强, 赵骧

Effect of Axial Ultrasonic Vibration on Metal Flow Behavior During Friction Stir Welding

HE Changshu, QIE Mofan, ZHANG Zhiqiang, ZHAO Xiang

图12 在UAFSW过程中不同螺纹特征产生的微区“抽吸-挤压”效应示意图 (a) conventional tool (b) tool with large thread groove depth (h1, h2—thread groove depths, h1 < h2) (c) tool with small pitch (P1, P2—pitches, P1 > P2)

Fig.12 Schematics of microscale sucking-extruding effect produced by different thread features during UAFSW