1993 年 11 巻 4 号 p. 484-489
It is said that the aluminum alloys with the content of magnesium more than approximately 0.5 mass% is difficult to be brazed and soldered. In this study, we attempted to solder the aluminum alloys, such as A5052 and A5056, which contain magnesium more than 2.5 mass% with the aid of ultrasonic vibration. The joining was performed in the air using no flux and a zinc plate as a filler metal.
Those alloys were able to be soldered at the temperarures between the eutectic point in Al-Zn binary system and the melting point of zinc. The tensile strength of a joint decreased with increasing the applying time of ultrasonic vibration over 1 sec and the vibration amplitude over approximately 50 km. The Mg amount segregated to a faying surface and the tensile strength of a joint decreased with increasing the heating rate to the joining temperature.