Investigation of the influence of wire preheating current on dilution and angular distortion on thick plate of ASTM A709-Gr 36 steel

In this work, the influence of preheat current of wire on the weld quality is investigated using a water-cooled ASAW process. The weld quality depends on direct process parameters and types of welding, which further influence the mechanical properties of weldments. To achieve a better weld quality,...

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Bibliographic Details
Published in:Welding international 2021-06, Vol.35 (4-6), p.127-137
Main Authors: Singh, Sanjay, Kumar, Manoj, Meena, M. L., Dangayach, G. S.
Format: Article
Language:English
Subjects:
Algorithms
Alloying
angular distortion
Bead on plate welding
Dilution
Distortion
Heating
High strength low alloy steels
HSLA steel
Investigations
jaya algorithm
Mathematical models
Mechanical properties
Optimization
Perturbation
Process parameters
Response surface methodology
rsm
Thick plates
Water cooled ASAW process
Welding parameters
Wire
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Summary:In this work, the influence of preheat current of wire on the weld quality is investigated using a water-cooled ASAW process. The weld quality depends on direct process parameters and types of welding, which further influence the mechanical properties of weldments. To achieve a better weld quality, it is utter importance to understand the effect of process parameters on response like area of penetration, area of reinforcement, dilution, and angular distortion. Initially, the experiments were carried out using a bead-on-plate (BOP) technique on micro-alloyed ASTM A709 Gr-36 steel. Furthermore, the mathematical models were developed using the response surface methodology with a centre composite design technique. Then, ANOVA, F, and lack-of-fit tests were used to verify the statistical significance of the mathematical models. The individual and interaction effects of process parameters on response were investigated using perturbation and 3D surface graphs. Finally, the desirability and JAYA algorithm were used to optimize the process parameters to obtain optimum parameters for improving the welding performance. Preheat current has shown significant impact on the dilution and angular distortion.
ISSN:0950-7116
1754-2138
DOI:10.1080/09507116.2021.1977591