To have a safe and reliable railway system, nondestructive testing (NDT) methods are necessary to be implemented in order to avoid catastrophic failures. NDT methods also provide a powerful tool for proper maintenance of valuable railway system assets. Among various NDT methods, ultrasonic testing (UT) along with magnetic particle testing (MPT) and eddy current testing (ECT) play significant ro...

As complete elimination of porosity from the weld is very difficult, next option available to minimize this porosity, which crucial for safe performance welded components. However, investigation through experiments alone tedious and time consuming. Additionally, limited models are in literature accurate prediction different attributes. The present study, thus, addressees both experimental as we...

Abstract For welding temperature field, stress and strain field in fillet joints, using the double ellipsoid heat source, ABAQUS software platform is used to simulate analyze process of joints with four different application sequences. By setting up observation points, study analyzed distribution simulated for these cases. The results show that vertical weld direction, sequence has a large effe...

Abstract The microstructure and properties of high nitrogen stainless steel welded joints under different flash currents were studied by butt welding. results show that, the welding parameters have obvious influence on joint structure mechanical properties. is organized into symmetrical distribution, grains obtained in interface area are small, mostly pearlite ferrite. With increase current, gr...

Abstract In this study, the fatigue performance of butt-welded austenitic stainless-steel joints is investigated by test, nominal-stress method and peak-stress method. Welding profiles misalignment were analyzed, residual stresses measured, tests conducted. The experimental data are regressed to stress range vs. life-to-failure (S–N) curve nominal method, factor affected dispersion analyzed usi...

Friction stir welding (FSW) is a solution to overcome the problems of AA 6061 welding. When initial temperature T0 material increased during FSW process while parameters are kept constant then parameter value can be lowered. was varied by Troom temperature, 50 0C, 75 100 0C and 125 0C. The weld joint design form square butt joint. By using this approach higher T0, with being constant, produce p...

Welding parameters for pipe joint friction stir welding (FSW) have been identified based on L-9 orthogonal arrays used in the Taguchi Method. Different parameters, such as rotation speed, travel speed and axial force, to produce several quality welded AA6063 butt joints. The reliability of products obtained FSW process can be improved through identification optimum combination parameters. Weld ...