Soldering of Al-Mg Alloy with the Aid of Ultrasonic Vibration

Soldering Aluminum with the Aid of Ultrasonic Vibration (3rd Report)

Abstract

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.