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

ABSTRACT

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.

KEYWORDS:

• Water cooled ASAW process
• HSLA steel
• dilution
• angular distortion
• rsm
• jaya algorithm

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or non-profit sectors.