Abstract
The aim of present work is to optimize the impact strength tested through IZOD process after welding of mild steel plates. The welding process is carried out by conventional gas tungsten arc welding technique. The input parameter selected are current, groove angle and number of passes whereas response is impact strength. Three set of current is selected i.e., 100, 200 and 300 A, groove angle are 30°,45°,60° and single and double passes. The joining process shows high impact for every weld joint. An increasing behavior in impact strength is observed with current as well as with groove angle. This may be due to simultaneous effect of high flow-ability alongside uniformly distribution of molten metal at the weld bead. At very high current speed and groove angle the impact strength is found to decrease. The inferior quality of weld may be observed due to generation of high heat, consequences in the formation of oxide at the weld bead along with development of high aspiration effect that ionized the particle to react with environment. The optimization result carried out through ANOVA technique on design expert software reveals that the value of current as 158.605 A notch angle 59° and single pass provides maximum impact strength i.e., 178.69 J.
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Singh, B.K., Chauhan, N., Mishra, A.K. et al. Experimental investigation of welding parameters to enhance the impact strength using gas tungsten arc welding. Int J Interact Des Manuf (2023). https://doi.org/10.1007/s12008-023-01264-1
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DOI: https://doi.org/10.1007/s12008-023-01264-1