Effect of beam oscillation and focusing on the electron beam welded 1100M high strength structural steel joint

Abstract The development of ultra-high-strength steels (UHSS) is revolutionizing its need in the diverse field application, and main credit going to new technological advancement manufacturing using special heat treatment like thermomechanical rolled process produce UHSS with up 1300 MPa tensile strength thicker plate. steel provides higher strength, toughness, extensive reduced weight, significant structural components load lifting vehicles (e.g., mobile cranes, trailers, concrete pump trucks, etc.) lower fuel consumption. However, welding also a challenge due their crack susceptibility hardness reduction heat-affected zone (HAZ). study’s objective analyse effect beam focus on weld geometry different oscillation microstructure behaviour 1100M EB-welded joint. S1100M samples thickness 15 mm were butt-welded by autogenous electron (EBW). study finds that can be satisfactorily welded EBW, improving focus. observed results show oscillation’s microstructural was attributed developing more uniform microstructure.