Ultrasonic Welding of Molybdenum Using Aluminium Interlayer

Abstract

The ultrasonic metal welding is an industrial technique whereby high-frequency ultrasonic acoustic vibrations are locally applied to the workpiece being held together under pressure to create a solid-state weld. In the present study, ultrasonic metal welding was successfully carried out on the material 0.3-mm molybdenum TZM alloy with pure aluminium interlayer. Al interlayer of 0.2, 0.25 and 0.3 mm thickness is inserted in between the faying surface. Experiments of ultrasonic metal welding were performed using Taguchi’s L27 orthogonal array. The weld strength of the welded joints is measured using tensometer. Results show that weld strength is increasing with an increase in pressure and weld time. Further, ANOVA result indicates that pressure and weld time have a maximum contribution on weld strength.