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 mi...

Ultrasonic peening treatment (UPT) as a method of severe plastic deformation was used to treat cruciform welded joints of Q345 steel. The application of UPT achieves material surface nanocrystallization of the peening zone, reduces stress concentration, and produces residual compressive stresses at the welded toe. Micro-structure, hardness, stress relief, S-N curve, and the fatigue fracture mec...

background: one of the methods used for joining metals together is welding, which can be carried out using different techniques such as electric spot welding. this study evaluated the effect of electric spot welding on the load defl ection rate of stainless steel and chromium-cobalt orthodontic wires. materials and methods: in this experimental-laboratory study, load defl ection rate of 0.016 ×...

V. Lazić, D. Arsić, S. Aleksandrović, A. Ilić, L. Ivanović, M. Djordjević, Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia A. Sedmak, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia This paper presents the analysis of the influence of temperature on mechanic properties of the base material and welded joints made of high strength steel. The joints...

dissimilar metals friction welding of austenitic–martensitic stainless steels is commonly used in order to manufacture engine valves in the automobile industry. in this study, x53crmnnin219 (austenitic stainless steel) and x45crsi93 (martensitic stainless steel) valve steel rods were welded by friction welding process. the welded joint was then heat treated at 760 0c for 60 min. mechanical prop...

The reliability of welded structure can be evaluated through welding residual stress analysis and fatigue strength assessment. In this study, welding residual stresses of multi-pass dissimilar material welded joint between alloy 617 and 12Cr steel were analyzed numerically and experimentally. Fatigue strength was then assessed in the air. Based on results of welding residual stress analysis and...