Identification of Microwave Radiation Effect on Copper Welded Joint with Brass as Filler Material Using Response Surface Methodology

In this study, copper plates were welded using the microwave technique, and brass material was used as an interface. The response surface methodology was used to optimize the microwave parameters for maximum joint strength, which resulted in a value of 264 MPa in 350 s. The welding temperature was maintained at 1,100 degrees C for maximum joint strength using a single microwave oscillator with a rated power of 890 W. A Hardness test was carried out, and the tested parameter was 79 BHN, which is a better result compared with traditional welding. The corrosion behavior of the copper welded joint was also observed to be an effect of brass when used as an interfacial material between the copper plates. Weight loss of the heat-affected zone in salt solution (5 % NaCl + 95 % water) after 96 hours was found to be zero. This result indicates that brass as a filler material also enhances the corrosion resistance of the welded joint.