Numerical Simulation of the Processes of Formation of a Welded Joint with a Pulsed ND:YAG Laser Welding of ZR–1%NB Alloy

Satyanarayana, G.; Narayana, K. L.; Rao, B. Nageswara; Slobodyan, Mikhail; Elkin, Maxim; Kiselev, A. S.

doi:10.1134/s0040601519030066

Cited by 14 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In laser welding, thermo-fluid phenomena were examined by integrating the user defined functions with the code of finite volume method in ANSYS and solving the Navier-Stokes and the k-equations in mushy zone and regions of weld pool as in Equation 1 (Satyanarayana et al, 2018;Satyanarayana et al, 2019a;Satyanarayana et al, 2019b).…”

Section: Thermo-fluid Analysismentioning

confidence: 99%

Numerical Simulations and Experimental Validation on LBW Bead Profiles of Ti-6Al-4V Alloy

Harish¹,

Seeram²,

Goteti³

et al. 2021

JST

View full text Add to dashboard Cite

The lightweight titanium alloys possess good resistance to corrosion and temperature. They are used in turbine engines and aircraft structures. The strength of weld joint is dependent on thermal history in the weld zone and the weld bead geometry. The quality of weld can be improved by specifying the optimal welding parameters. Trial-and-error experimental methods are time-consuming and expensive. This paper deals with Computational Fluid Dynamics (CFD) models to carry out three-dimensional thermo-fluid analysis. Buoyancy and Marnangoni stress are incorporated. Temperature dependent properties of Ti-6Al-4V alloy and the process conditions are specified for generating the weld bead profile. The CFD model is validated initially through comparison of existing test data. Further studies are made by conducting tests on the pulsating laser welding of Ti-6Al-4V alloy. The effects of welding speed, pulse width and pulse frequency on the weld bead geometry are examined. This study confirms the adequacy of modeling and simulations of weld bead geometry with test results.

show abstract

Section: Thermo-fluid Analysismentioning

confidence: 99%

Numerical Simulations and Experimental Validation on LBW Bead Profiles of Ti-6Al-4V Alloy

Harish¹,

Seeram²,

Goteti³

et al. 2021

JST

View full text Add to dashboard Cite

show abstract

“…Then, the average amounts of the results obtained from the analytical method are compared for various locations. In order for the solidification rate within the melt pool to be determined, the values of temperature gradient and cooling rate achieved from the analytical Rosenthal equation are used in Equation (12) for each point in the melt pool.…”

Section: Predicted Temperature-dependent Parametersmentioning

confidence: 99%

“…For determining the solidification rate within the molten pool, the cooling rate is measured in the same way as the temperature gradient which was discussed before. Then, the temperature gradient and the cooling rate obtained from the numerical modeling are used in Equation (12), and ultimately, the values of the solidification rate are attained for different locations within the melt pool. (c) variation of temperature gradient versus temperature for different points within the molten pool obtained from the numerical modeling using a laser beam with an average power of 80 W, welding velocity of 2 mm · s , and absorption coefficient of 0.36.…”

Section: Predicted Temperature-dependent Parametersmentioning

confidence: 99%

“…Furthermore, they accomplished a relationship between numerical results and experimental ones for weld pool geometries and heat transfer. Satyanarayana et al [12] have applied the convection mode of heat transfer and Marangoni stresses in the fusion zone and have also calculated heating and cooling rates with which they would then use to study the microstructure of fusion and heat affected zones during laser welding of ZR-1%NB alloy. In another study [13], a finite element model was developed to investigate hot cracking phenomena during laser welding of 6xxx aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Comparative Study of Analytical Rosenthal, Finite Element, and Experimental Approaches in Laser Welding of AA5456 Alloy

Hekmatjou

Zeng

Shen

et al. 2020

Metals

View full text Add to dashboard Cite

The thermal regime and microstructural phenomenon are studied by using finite-element (FE) modelling and the analytical Rosenthal equation during laser welding of aluminum alloy 5456 (AA5456) components. A major goal is to determine the merits and demerits of this analytical equation which can be an alternative to FE analysis, and to evaluate the effect of imperative assumptions on predicted consequences. Using results from the analytical and numerical approaches in conjunction with experiments, different physical features are compared. In this study, the results obtained from experiments in terms of melt pool shapes are compared with the predicted ones achieved from the numerical and analytical approaches in which the FE model is more accurate than the Rosenthal equation in the estimation of the melt pool dimensions. Furthermore, as to the partially melted zones, the estimations achieved from the numerical modeling are more genuine than ones from the analytical equation with regards to the experimental results. At high energy density, near keyhole welding mode, the reported results show that experimental melt widths are supposed to be narrower than the fusion widths estimated by the analytical solution. The primary explanation could be the influence of thermal losses that occurred during convection and radiation, which are neglected in the Rosenthal equation. Additionally, the primary dendrite arm spacing (PDAS) estimated with the numerical modeling and the analytical Rosenthal solution is comparable with the experimental results obtained.

show abstract

“…The present model can accommodate the temperature-dependent material properties. The generic nature of the model can be used for any material and fusion welding process with laser beam specifying the material properties using UDF, which is being assessed by conducting case studies on different materials (viz., zircaloy-4, carbon steel and E110 (Zr-1% Nb)) [28,37].…”

Section: Validation Of Numerical Simulationsmentioning

confidence: 99%

Numerical investigation of temperature distribution and melt pool geometry in laser beam welding of a Zr–1% Nb alloy nuclear fuel rod end cap

2019

View full text Add to dashboard Cite

Zr-Nb alloys are used in the nuclear and chemical industries, in which the welding of an end cap to a fuel rod is a critical issue in manufacturing processes. To identify the optimal process parameters for achieving good-quality welds, it is necessary to investigate the thermal environment in the fusion and heat-affected zones. A three-dimensional computational fluid dynamics analysis is performed with a volumetric heat source by simulating the interaction of the heat source and the material and by accounting for the phase change during welding. The model incorporates the buoyancy force and Marangoni stress and generates the temperature distribution, weld bead geometry and fluid flow in the weld pool during the laser welding process.

show abstract

Numerical Simulation of the Processes of Formation of a Welded Joint with a Pulsed ND:YAG Laser Welding of ZR–1%NB Alloy

Cited by 14 publications

References 33 publications

Numerical Simulations and Experimental Validation on LBW Bead Profiles of Ti-6Al-4V Alloy

Numerical Simulations and Experimental Validation on LBW Bead Profiles of Ti-6Al-4V Alloy

A Comparative Study of Analytical Rosenthal, Finite Element, and Experimental Approaches in Laser Welding of AA5456 Alloy

Numerical investigation of temperature distribution and melt pool geometry in laser beam welding of a Zr–1% Nb alloy nuclear fuel rod end cap

Contact Info

Product

Resources

About