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Ultrasonic-assisted soldering of 2024 aluminum alloys using a filler metal of Zn-5Al alloy was investigated at the temperature of 400 °C, which is lower than the solution strengthening temperature of Al-Cu alloys. The ultrasonic vibration with power of 200 W and vibration amplitude of 15 μm at the frequency of 21 kHz was applied on the top samples. The ultrasonic vibration promoted the dissolution...
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