Effect of process parameters on microhardness and microstructure of heat affected zone in submerged arc welding

Kumar, Pushpinder; Batish, Ajay; Bhattacharya, Anirban; Duvedi, Ravinder Kumar

doi:10.1243/09544054jem2143

Cited by 15 publications

(9 citation statements)

References 22 publications

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“…The welding current, voltage and electrode stick-out have remarkable effects on the weld hardness and HAZ hardness [3]. Type of flux and welding current were the most important factors influencing on the microhardness, where it possess a large increasing with the welding current increase [4]. Microhardness of the heat affected zone and weld metal dropped when the heat input was increased.…”

Section: Introductionmentioning

confidence: 99%

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60

Bakhy¹,

Amin²,

Abdullah³

2018

ETJ

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Submerged Arc Welding (SAW) process is generally used for industries, such as petroleum storage tanks, pressure vessels, and structural components. Good mechanical properties of welded joint lead to crack-free strong joints. In this research, included angle, current, welding travel speed and arc voltage were utilized as welding parameters to weld ASTM A516 Grade 60 (low carbon steel). The experiments were carried out according to a design matrix that established by DOE (Version10) with RSM technique. Microhardness of welded samples was measured by a Digital Microhardness Tester, and then RSM technique was used to model and optimize the microhardness based on the welding parameters. The results showed that the including angle and welding current have a great effect on the microhardness. The optimum solution for minimum microhardness was found at 450 Amp welding current, 38 cpm welding speed, 34-volt arc voltage and included angle of 60⁰. The optimum value of microhardness was (186.7 HV). Eventually, the experimental and predicted results of microhardness were found in good agreement with 4.6%. maximum error.

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Section: Introductionmentioning

confidence: 99%

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60

Bakhy¹,

Amin²,

Abdullah³

2018

ETJ

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“…Along with numerical study, some researchers did experimental study to determine the effect of different process parameters; 22 few of them worked to optimize the process parameters for getting the target weld quality. 23,24 In addition to residual stresses and distortion, researchers have also studied the effect of welding parameters, welding sequences, welding joint geometry, and root opening in the past. Tsai et al 25 studied the effect of welding sequence on buckling and warping behavior of a thin plate panel structure.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of weld-induced distortion of large structure using equivalent load technique

Mondal

Lohit

Biswas

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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Angular distortion in fusion welded joints is an alarming issue which affects the stability and life of the welded structures, occurs due to the changes in the temperature gradient during the welding process. This degrades the dimensional quality of a large structure during assembly which leads to rework the products and hence decreases the productivity. Predicting the weld-induced residual deformation before the production saves the valuable time and resources for rework. The conventional coupled transient, nonlinear, elasto-plastic thermo-mechanical analysis involves huge computational time. Computing a weld sample of small size with single pass itself takes several hours, which will be a huge amount of time in case of large structures consisting of several welding passes; thus, there is a real need of an efficient alternative technique to predict the post-weld distortions. In this work, an attempt has been made to determine the deformation in a submerged arc welded structure using equivalent load technique which reduces the total analysis time by one-third of the conventional techniques in case of a small weld structure. In this proposed method, the transient nonlinear elasto-plastic structural analysis part which is the major time-consuming part of analysis has been almost eliminated. So, this method can effectively use to predict the weld-induced distortion of very large structure with a computation time almost equal to the time required for transient thermal analysis of a small weld structure only. It is not feasible to analyze such a large welded structure with conventional coupled transient, elasto-plastic, nonlinear thermomechanical analysis. The predicted results of distortions have been validated with the experimental as well as published results and good agreements have been found.

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“…Many researchers have investigated different aspects in the numerical modeling of the welding-induced distortions, mostly using finite element (FE) methodology. 4,5 The distortion mechanisms and the effect of welding sequence on panel distortion using two-dimensional (2D) FE model were studied by Tsai et al 6 Kumar et al 7 studied the effect of flux, welding current, arc voltage and travel speed on changes in micro hardness and microstructure of the heat-affected zone and optimized the process to have minimum changes in material properties using SAW process. Teng et al 8 simulated the residual stresses and distortions in T-joint fillet welds with the effects of flange thickness, welding penetration depth and restraint condition of welding.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation on the effects of submerged arc welding sequence on the residual distortion of the fillet welded plates

Zargar

Farahani

Givi

2015

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this study, in order to estimate the residual distortions of the fillet welded plates, three-dimensional finite element simulation was employed. The simulation included the uncoupled thermal and structural analyses which used the element birth and death technique to simulate the addition of weld metal to the workpiece. The accuracy of the finite element model was assessed by comparing the distortion results with experimental measurements. The effects of five different welding sequences on the residual distortion in fillet welded plates were investigated. The residual welding distortion in different positions for fillet welded plates was studied. It is obtained that by choosing the appropriate welding sequence, the maximum vertical residual distortion could be decreased significantly.

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Effect of process parameters on microhardness and microstructure of heat affected zone in submerged arc welding

Cited by 15 publications

References 22 publications

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60

Influence of SAW Welding Parameters on Microhardness of Steel A516-Gr60

Prediction of weld-induced distortion of large structure using equivalent load technique

Numerical and experimental investigation on the effects of submerged arc welding sequence on the residual distortion of the fillet welded plates

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