Investigations on Modified Friction Welding Samples of SA-Grade Materials Used in Box-Type Heat Exchangers

This research investigation states that seamless ferritic and austenitic alloy (SA) boiler grade material were joined by a friction welding process implementing an external tool. This process was further investigated to blooming the advantages in the mechanical and metallurgical areas. In this process, capital joint strength was analyzed by taking the tensile strength test from nine welding samples. Three input parameters, such as the rotational tool speed, the extrusion of the tube, and the depth impression on the tube plate, were investigated in the study of capital weld interface strength. Meanwhile, the output constrain is considered as pull strength. Previously, the joint is made by welding by employing a supporting block at interference fit conditions. Finally, the optimum collective strength characteristics from this research area segregate 1073.5 N/m2.