Numerical investigation on the effect of welding speed and heat input on the residual stress of multi-pass TIG welded stainless steel pipe

Abstract

A numerical investigation is provided to study the residual stress states in multi-pass TIG welding of stainless steel SUS304 pipe. An uncoupled thermomechanical three-dimensional finite element model is developed using the ABAQUS software for a circular weld design around the pipe. The effects of weld pass numbers, electrode moving speed, and heat input on the internal and external surface tensions of the pipe are investigated. The simulation results show that by increasing the welding speed, the axial tensile stresses decrease on the pipe surfaces. In the case of hoop stress, as the welding speed raises, the tensile and compressive stresses are increased for both two- and three-pass welding. However, the width of the stress zone becomes narrower in higher welding speeds. The hoop stresses, in comparison with the axial stresses, are more strongly influenced by the welding speed and the heat input. Furthermore, using the three-pass welding process results in much lower stresses in comparison with the two-pass one.

Multiphysics modelling of Gas Tungsten Arc Welding on ultra-thin-walled titanium tubing

“…Yet fulfilling the targets in both Table 2.2 and Table 2.3 to create an experimental and a simulation study together would demonstrate a strong research novelty and a valuable addition to the field. The efficacy of a joint modelling and experimental approach to predict process parameters has been demonstrated in prior mentioned studies [15,43] which further underlines the viability of this research novelty. The present work can also be compared to two fully coupled WPM studies, Wang and Lu [39] and Traidia [40].…”

“…Whilst these results do feature details on mechanical deformation, only the heat transfer equation is solved for thus this does not address the liquid metal flow critical for ultra-thin-walled tube welding which a FVM method would be able to achieve. Despite this, ABAQUS remains popular for this vein of research shown by recent results from Asadi et al [43] investigating the effects of welding parameters on the residual stresses created during GTAW pipe welding also on 6 mm AISI 304 pipe. The efficacy of ABAQUS was demonstrated in [43] by the reasonable match to the complementary experiment performed in the same study.…”

“…Despite this, ABAQUS remains popular for this vein of research shown by recent results from Asadi et al [43] investigating the effects of welding parameters on the residual stresses created during GTAW pipe welding also on 6 mm AISI 304 pipe. The efficacy of ABAQUS was demonstrated in [43] by the reasonable match to the complementary experiment performed in the same study.…”

“…Broadly, these can be split into commercial software, open-source non-profit software and complete custom software created from scratch. Much of the commercial software mentioned thus far is FEM based such as ABAQUS [41,43], SYSWELD [42] and MSC Marc [25,26]. However there are two prominent FVM software packages ANSYS Fluent and COMSOL.…”

“…This table shows that there is a clear research gap for ultra-thin-walled tube welding research. Asaid [43] 0 Tube Choquet [65] 0 Plane Han [6] 0 Plane Liang [32] 0 Plane Mishra [36] 0 Plane Obeid [41] 0 Tube Purmohamad [45] 0 Tube Singh [44] 0 Tube Tanaka [38] 0 Plane Traidia [40] 0 Plane Uhrlandt [33] 0 Plane Velázquez-Sánchez [31] 0 Plane Wang [39] 0 Plane Saldi [37] ≥ 5 Plane Sass-tisovskaya [68] 2 Plane Shirvan [69] 1 Plane…”