Fatigue Properties and Residual Stresses of Laser-Welded Heat-Resistant Pressure Vessel Steel, Verification on Vessel Model

Most power plants use the Rankine cycle, where heat supplied to water and steam is converted into mechanical work; therefore, most components have be made of heat-resistant steel. Sufficient properties must ensured for welded pipes meet stringent requirements. Therefore, laser-welded 5 mm thick pressure vessel steel plates were subjected various tests, including high-cycle fatigue tests. The microstructural notches determined using X-ray diffraction too determine critical areas that are susceptible crack initialization affect service life. Finally, a functional model subsequently verified results assumptions. presented ensure transferability real-life applications outline promising application potential laser welding producing vessels from in industry.