Prediction of thermal and residual stress distributions in SS304 materials for nuclear application using finite element analysis

Vemanaboina, Harinadh; Akella, Suresh; Buddu, Ramesh Kumar; Yelamasetti, Balram; Matam, Mohan Babu; Salem, Karrar Hazim; Saxena, Kuldeep K.; Prakash, Chander; Buddhi, Dharam

doi:10.1007/s12008-022-01153-z

Cited by 30 publications

(3 citation statements)

References 29 publications

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“…The variance is calculated by adding all the squares together. F-test is a technique for comparing variances and testing the significance of a null hypothesis, as described [11,12]. The hypothesis test in One-Way ANOVA is between the variance of the mean and the variance of the error.…”

Section: Resultsmentioning

confidence: 99%

Distortion control in CO2 Laser Beam dissimilar welds of SS316L to INCONEL625 plates

Chejarla,

Soma Sekhar Reddy,

Siva Sankar

et al. 2023

E3S Web Conf.

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The paper attempts to join similar and dissimilar joints by employing CO2 laser beam welding. The SS316L and INCONEL625 plates of 5mm thick plates are used. The L4 orthogonal array was chosen for the experimentation. Three parameters are chosen in two levels, and four trials are optimized. Analysis of Variance (ANOVA) is used to optimize and determine the most critical parameters. The weldments have undergone visual, X-ray radiography, and macrostructure examination to verify the quality of the weldments verified with full penetration. Distortion in dissimilar weldments may be measured using a vernier height gauge. Simple inspection methods, No-way ANOVA, Linear Figures, and ANOVA were used, and two parameters were identified with 99% criticality. ANOVA shows 95% significance for distortion with welding speed at 51.9%, welding current at 13%, and shielding Flow rate at 12.3% contribution. The welding speed and laser power are significant, while shielding gas is not a critical parameter but essential for the quality of the joint.

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Section: Resultsmentioning

confidence: 99%

Distortion control in CO2 Laser Beam dissimilar welds of SS316L to INCONEL625 plates

Chejarla,

Soma Sekhar Reddy,

Siva Sankar

et al. 2023

E3S Web Conf.

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“…The shapes of the GTA butt welded specimens in previous studies have had a symmetrical structure, and most of the canister internal structures were austenitic stainless steel. Previous studies have shown the results of GTA weld thermal analyses and numerical analyses of residual stress when using stainless steel to manufacture pressure vessels and nuclear reactor components [16,17]. Thermal deformation results from various thicknesses of surface-hardened specimens were analyzed after the GTAW process.…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of Thermal Diffusion and Non-Uniform Temperature Distribution along the Sidewall Thickness of STS316L during Gas Tungsten Arc Butt Welding

Na,

Jeong,

Kim

et al. 2024

Processes

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This study investigated how welding affects the thermal deformation of square cells produced for casks, which are dry storage containers for spent nuclear fuel. We aimed to minimize structural deformation by utilizing STS316L as the material for the square cells. We explored a method of subdividing the square cells and joining them through butt welding. Keeping the upper plate thickness constant, GTA butt welding was conducted while varying the column’s wall thickness, followed by measurement with a laser vision sensor. The heat conduction and thermal strain were then calculated using a finite element analysis (FEM). Both experimental and analytical results confirmed that there was significant thermal deformation in the cases of thick-walled columns due to variations in heat conduction distribution, with the resulting deformation patterns depending on thickness.

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“…Using three-dimensional finite element analysis, temperature, and residual stress distributions in SS304 materials for the nuclear industry are successfully studied using ANSYS. Transverse analysis of residual stress provides insight into structural stability [8]. Residual stresses caused by weld repair on weld joints made of austenitic stainless steel are increased by more than 100 percent.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

Ragavendran,

Vasudevan

2023

Engineering Science & Technology

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The main structural material used in the building of Fast Breeder Reactors (FBR) is stainless steel of type 316L(N). Finite Element Model (FEM)-based simulations were carried out to understand the effect of various welding processes on the residual stresses induced in 316L(N) stainless steel primary sodium-carrying pipes with an inner diameter of 208 mm and a wall thickness of 5.6 mm. The welding processes considered include multi-pass Tungsten Inert Gas (TIG) welding, A-TIG, laser, hybrid laser-TIG, and Hybrid laser-Metal Inert Gas (MIG). First, single or hybrid heat sources are chosen based on the welding process, and then weld bead profiles obtained during simulation are made to match with that of the actual weld bead profiles obtained during experiments. Then, the optimised heat source is employed for the thermal analysis. The thermal analysis output is then successively linked and provided as input to the mechanical analysis, which uses an isotropic hardening model to predict hoop and axial residual stresses in pipe weld joints. The results show that the A-TIG weld joint exhibited lower hoop stress (165 MPa at inner diameter and -2 MPa at outer diameter) in comparison with that of the other weld joints. The lower residual stress is attributed due to the straight-sided weld bead, lower peak temperature, and slower cooling rate of the A-TIG welding. Therefore, A-TIG welding is recommended among the chosen fusion welding processes for welding of 316L(N) stainless steel primary sodium carrying pipes to minimise the residual stresses and mitigate the premature failure of the pipe weld joints.

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Prediction of thermal and residual stress distributions in SS304 materials for nuclear application using finite element analysis

Cited by 30 publications

References 29 publications

Distortion control in CO2 Laser Beam dissimilar welds of SS316L to INCONEL625 plates

Distortion control in CO2 Laser Beam dissimilar welds of SS316L to INCONEL625 plates

Structural Analysis of Thermal Diffusion and Non-Uniform Temperature Distribution along the Sidewall Thickness of STS316L during Gas Tungsten Arc Butt Welding

Numerical Simulation of the Effect of Fusion Welding Processes on Residual Stress in Stainless Steel Pipe Weld Joints Used in Fast Reactors

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