POP-CALIMANU Marius Politehnica University of Timisoara

Spoluautoři POP-CALIMANU Ioana, GUBENCU Dinu, FLESER Traian

Ultrasonic Welding is a solid state welding process, where a high-frequency vibration is combined with welding pressure to join two similar or dissimilar material together in a very short time, where the vibrations are applied parallel to the interface between the parts, without producing a significant amount of heat during the process and without causing changes in the properties of work pieces. In this paper were optimized the parameters of ultrasonic welding like the pressure welding, time welding and amplitude of vibrations to obtain the highest strength of joints for welding of Al/20% SiC metal matrix composite using a 2k full factorial design. Of course, we are interested to know which variable of the process affect most the response. The experiment is performed using Al/20%SiC metal matrix composite under discs form with 1 mm thickness, and the temperature generated during the welding process is measured. Also the temperature distribution is studied in the highest strength of the weld and how this, influence the microstructure of the Al/20% SIC metal matrix composite. It was observed that the temperature developed is not more than 40% of the melting point of the based metal. After welding metallographic examinations and hardness measurements are performed in the characteristics areas of the weld.

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