1. 1) For example, Ultrasonic Welding, in Welding Handbook vol.2 8th edition edited by R. L. O' Brien, American Welding Society, (1991) pp784-812.
2. 2) For example, E.HETRICK, et al: Ultrasonic Spot Welding-A New Tool for Aluminum Joining-, Welding Journal, Vol.84, No.2 (2005), pp26-30.
3. 3) U. I. CHANG and J. FRISCH: On Optimization of Some Param eters in Ultrasonic Metal Welding, Welding Journal, Vol.53, No.1 (1974), 24S-35S.
4. Effect of Magnesium on Ultrasonic Weldability of Al-Mg Alloy. Ultrasonic Welding of Al-Mg Alloy. (1st Report).
5. Ultrasonic Welding of Heat Treatable Aluminum Alloy A6061 Sheet