Research Article

A Cooks Distance Approach to Control the Haz and Arc Length of Tig Mild Steel Weld

F. O. Uwoghiren
University of Benin, Nigeria
A. Ozigagun
University of Benin, Nigeria
* Corresponding author
DOI icon 10.24018/ejeng.2021.6.5.2543

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Submitted 2021-07-28
Published 2021-08-20

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Table of Contents

Article Main Content

The heat affected zone and arc length parameters have a vital role to play in determining the integrity of a weld structure. The cooks distance is a statistical diagnostic employed in this study to select the best optimum combination of welding process parameters. Mild steel plate was the choice material used to produce the weld specimen, which was welded with the Tungsten inert gas method. The RSM model was used to develop an optimal solution that can explain the behavior of the welded joint with respect to the heat affected zone and arc length, different diagnostic techniques were employed which includes the normal probability plot and cooks distance plot. The model developed has sufficient merit as the results obtained shows that the cooks distance values is within the range of 0 and 1 indicating the absence of outlier in the data making the optimal solution highly acceptable.

Keywords: Arc length, cooks distance, control, heat affected zone, inert gas, mild steel, weld, Tungsten

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