Finite element based parametric study on the characterization of weld process moving heat source parameters in austenitic stainless steel

Velaga, Satish K.; Ravisankar, A.

doi:10.1016/j.ijpvp.2017.09.001

Cited by 30 publications

(16 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The double-ellipsoidal heat source model considers the digging effect and is more suitable for simulating the welding process [10]. The body heat source acting on the substrate is divided into two different parts along the moving direction.…”

Section: Heat Source and Driving Forcesmentioning

confidence: 99%

“…Arc forces and gravity are the driving influences for the fluidity of the molten pool, which are different from various materials. Most of the threedimensional numerical heat transfer and fluid flow models were concerned with iron and its alloys [8][9][10] while the heat transfer and fluid flow in the aluminum alloys have not received much attention in the literature [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical analysis of arc driving forces and temperature distribution in pulsed TIG welding

Guo

Wei

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

In order to study the influence of each driving force on the flow of molten pool and its influence degree, separate action models for the arc driving forces were established based on the finite difference method. It is found that the descending order of the driving force influence is surface tension, arc pressure, Lorentz force, drag force and buoyancy when the current is a constant value of 200 A. Based on the calculation of arc driving forces, a transient three-dimensional model of the pulsed TIG welding is established. The alternation of peak current and base current leads to periodic oscillation of molten pool surface and the formation of welding ripples. The results show that the distance between adjacent welding ripples is almost directly proportional to the scanning speed and the molten pool depth decreases with increasing speed and the decreasing speed gradually decreases. By studying the distribution of pressure field and temperature field, it is found that the pressure distribution of a semi-arc column is basically a half-Gaussian distribution and the heat accumulation has a significant effect on the maximum temperature of the substrate.

show abstract

Section: Heat Source and Driving Forcesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of arc driving forces and temperature distribution in pulsed TIG welding

Guo

Wei

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The 304 stainless steel was used as the substrate. The chemical composition of the 304 stainless steel is shown in Table 2 [34,35]. Figure 2 shows the material properties of the 304 stainless steel.…”

Section: Materials Element (Wt %) Al Si Ti Nimentioning

confidence: 99%

Numerical Simulation of Thermal Evolution and Solidification Behavior of Laser Cladding AlSiTiNi Composite Coatings

Liu

et al. 2019

Coatings

View full text Add to dashboard Cite

In order to better understand how a high energy input and a fast cooling rate affect the geometric morphology and microstructure of laser cladding aluminum composite coatings, a three-dimensional (3D) transient finite element model (FEM) has been established to study the temperature field evolution during laser cladding of AlSiTiNi coatings on a 304 stainless steel substrate. In this model, a planar Gauss heat source and a temperature selection judgment mechanism are used to simulate the melting and solidification process as well as the geometric morphology of the laser cladding coatings. The differences in physical characteristics of the cladding materials before and after melting are considered. The results of thermal simulations, including temperature history, temperature gradient, and solidification rate, of the laser cladding coatings are investigated. Corresponding experiments, conducted using an IPG-YLS-5000 fiber laser, are used to verify the simulation results. The experimental observations agree well with the theoretical predictions, which indicates that the established model is valid.

show abstract

“…Tensile residual stresses are mostly damaging, improving the susceptibility of the weldment to the fracture, fatigue, and corrosion cracking. 8 In the risk assessment for defects growth, that is, cracks in piping systems, sometimes rather than the stress made by design loads, the residual stress made by the welding could be a crucial part of the total stress field. 5,9 Furthermore, to hinder inter-granular stress corrosion around the stainless steel weldments, it is essential to control the metal properties, the process situation, and the residual stresses caused probably by the welding.…”

Section: Introductionmentioning

confidence: 99%

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

Asadi

Alimohammadi

Kohantorabi

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

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.

show abstract

Finite element based parametric study on the characterization of weld process moving heat source parameters in austenitic stainless steel

Cited by 30 publications

References 20 publications

Numerical analysis of arc driving forces and temperature distribution in pulsed TIG welding

Numerical analysis of arc driving forces and temperature distribution in pulsed TIG welding

Numerical Simulation of Thermal Evolution and Solidification Behavior of Laser Cladding AlSiTiNi Composite Coatings

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

Contact Info

Product

Resources

About