| 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1 超声辅助搅拌摩擦焊(UAFSW)实验装置和搅拌头几何尺寸 | 
| Fig.1 Experimental setup of ultrasonic-assisted friction stir welding (UAFSW) (a) and geometric dimension of welding tool (d1—root diameter, 8 mm; d2—head diameter, 4.8 mm; D—shoulder diameter, 16 mm; H—pin length, 5.8 mm) (b) | 
|   |