Welding characteristics of butt-welded Inconel625 plate using CO2 laser beam

Vemanaboina, Harinadh; Naidu, G.Guruvaiah; Kumar, Golla Vinod; Reddy, D. Ramachandra

doi:10.1016/j.matpr.2019.08.223

Cited by 12 publications

(5 citation statements)

References 8 publications

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“…Excess penetrations are eliminated, and no further machining process for finishing in LBW welds compared to the arc welding process is needed. Microstructural changes are limited because of the low heat input with faster cooling rates [9][10][11][12][13][14][15]. In references [16,17], authors carried out a comparative study using both arc and electron beam welding process applied to 316L stainless steels; they found that metastable phases formed during solidification of fusion zone in EBW joints compared to that obtained with the GTAW process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Vemanaboina

Gundabattini

Akella³

et al. 2021

Applied Sciences

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In the frame of the circular economy, welding of Ni-based superalloys has gained increasing importance when applied, for instance, to repairing highly expensive components widely used in strategical sectors, such as the defense and aerospace industries. However, correct process parameters avoiding metallurgical defects and premature failures need to be known. To reach this goal, Inconel 625 butt-welded joints were produced by CO2 laser beam welding and different combinations of process parameters. The experimental investigation was carried out with three parameters in two levels with an L4 orthogonal array. Laser power, welding speed, and shielding gas flow rate were varied, and the results were reported in terms of mechanical properties, such as microhardness, tensile strength, distortion, residual stress, and weld bead geometry, and metallurgy. At a lower welding speed of 1 m/min, the full penetration was observed for 3.0 kW and 3.3 kW laser powers. However, sound welds (porosity-free) were produced with a laser power of 3.3 kW. Overall, the obtained full-penetration specimens showed a tensile strength comparable with that of the parent material with residual stresses and distortions increasing with the increase in heat input.

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Section: Introductionmentioning

confidence: 99%

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Vemanaboina

Gundabattini

Akella³

et al. 2021

Applied Sciences

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“…As shown in figure 1, the finer mesh is put on the fusion zone with a mesh size of 1 mm, and the coarser mesh is put on the rest of the plate with a mesh size of 2 mm. The process parameters for the simulation process are chosen from the literature available for SS316L [15,16] grades and same properties is used. This is a procedure for transient finite element analysis using the Gaussian heat source model as given the figure 1(d).…”

Section: Computational Formulation and Heat Source Modelmentioning

confidence: 99%

“…Temperature dependent thermal properties of the base material is taken [18] for transient thermal is shown in figure 1(c) and static structural analysis the mechanical properties of the base material are taken from table 2, on the upper surface of the Table1. Laser beam welding parameters for the simulation and experimentation process [16].…”

Section: Basic Assumption and Governing Equationmentioning

confidence: 99%

Evaluation of residual stresses in CO₂ laser beam welding of SS316L weldments using FEA

Vemanaboina

Babu

Prerana

et al. 2023

Mater. Res. Express

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Laser welding is used in critical component production when tight tolerances like minimal distortions and residual stresses are required. Laser beam welding offers a lower heat input, a smaller heat affected zone, lower residual stresses, minimum distortions, and greater mechanical joint characteristics than conventional welding does. In order to simulate the laser welding process used on SS316L plates, the Gaussian heat source model was used. The model is developed and simulated with volumetric heat source model with APDL coding using ANSYS. The thermal profiles at the joint cross sections via welded area, interface across joints is taken for the analysis. The maximum temperature was observed at the fusion zone and associated zones. The residual stresses are analysed in the same path and found the stresses are in safe limits of base material. Predicted and experimentally measured residual stresses are close agreement with 10%.

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“…Harinadh et al [6][7][8] had reported the importance of distortion formed during the arc and beam welding process for similar and dissimilar joints. Vernier height gauges used for measuring the distortion in the weldments.…”

Section: Introductionmentioning

confidence: 99%

Distortion Control for Dissimilar Welding of SS321 to Hastelloy C-276 with CO2 Laser Beam Butt Joints Using Taguchi Methods

Naidu¹,

Jajimoggala²

2021

MMEP

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The laser beam welding process is a promising technology because of its reliability and ability to automate the process easily. This study aims to analyze distortion for dissimilar laser weld joints. Hastelloy C276 and SS321 plates are joined by using the CO2 Laser beam welding. Welding current, welding speed and shielding gas flow are chosen as process parameters for preparing butt joints. Each of the factors has two levels to control the parameters of the output. Experimentation was conducted with four trails by using an L4 orthogonal array. The quality of the welds and bead geometry are verified through macrostructure examination. The Vernier height gauge was used for the measurement of distortion in the weldments. Lower the better-quality characteristic is chosen for the response. ANOVA studies identified laser power at 81%, the weld speed at 16% parameters is a contribution with a statistical of about 95%. Full penetration was observed for all the experimental trails.

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Welding characteristics of butt-welded Inconel625 plate using CO2 laser beam

Cited by 12 publications

References 8 publications

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Evaluation of residual stresses in CO₂ laser beam welding of SS316L weldments using FEA

Distortion Control for Dissimilar Welding of SS321 to Hastelloy C-276 with CO2 Laser Beam Butt Joints Using Taguchi Methods

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Welding characteristics of butt-welded Inconel625 plate using CO2 laser beam

Cited by 12 publications

References 8 publications

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Mechanical and Metallurgical Properties of CO2 Laser Beam INCONEL 625 Welded Joints

Evaluation of residual stresses in CO2 laser beam welding of SS316L weldments using FEA

Distortion Control for Dissimilar Welding of SS321 to Hastelloy C-276 with CO2 Laser Beam Butt Joints Using Taguchi Methods

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Evaluation of residual stresses in CO₂ laser beam welding of SS316L weldments using FEA