Abstract
Joining of dissimilar metal plates by using ultrasonic vibrations was investigated. Plastic flow appeared when joining two aluminium plates by applying a zero amplitude ultrasonic wave (stress amplitude is at a maximum). Over time, the plastic flow became larger and resulted in a stirring phenomenon of the materials. By utilizing this stirring phenomenon, an aluminium plate was joined to a steel plate. The resultant plate was analysed with cross tension test and cross section observation. These results revealed the relation between ultrasonic conditions and cross tensile load. When joining an aluminum plate to various kinds of metal plate, the cross tensile load of the joint reached a maximum value of 200N. The cross tension tests reveal that the fracture of the materials resulted in plug failure mode. Therefore, the achieved maximum cross tensile strength is determined by the tensile strength of the aluminum plate. The strength of the bonding was stronger than the tensile strength of the aluminum plate. These results led us to the conclusion that joining of dissimilar metal plates has been attained using ultrasonic vibrations.
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