Investigation of Mechanical and Metallurgical Properties of Friction Welded Joints for Dissimilar Metals (HSS M2 and EN8 Steel)

This study examines the effects of changing process parameters on the rotary friction welding of comparable (16MnCr5) and different (HSS M2 and EN8 Steel) metals. Weld joints between combination metals that are comparable and different are examined for joint strength, hardness, tensile strength, and microstructure. Under the tensile test, joint strength was also assessed. Furthermore, the tensile strengths of the comparable and dissimilar metals after welding were 715.3 MPa and 600.6 MPa, respectively. It was discovered that the relative Vickers hardness of comparable and different metals was 380 H_V and 140 H_V. Microstructural examination identifies various zones, such as a parent metal zone that was untouched by heat, a heat-affected zone, and a completely deformed plasticized zone (Weld Zone). It was observed that, the tensile behaviour of friction welded 16MnCr5 metal resembled fractographic pattern of a brittle material. The microstructure formed in dissimilar material at the interface zone was made up of fine bands of ferritic and pearlite.