¹Okonji Paul. O., ¹Utu Ochuko G.

 ²Agbedeyi Desmond

¹Department of Welding and Fabrication, Delta State Polytechnic, Ogwashi-Uku, Nigeria.

²Department of Mathematics and Statistics Delta State Polytechnic, Ogwashi-Uku, Nigeria.

Abstract

A mathematical model for predicting the hardness of GTAW welded austenitic stainless steel joint was developed. Deviational and statistical analyses as well as scatter diagrams were used to test and confirm its validity and accuracy. The maximum deviation between the model-predicted and actual experimental values was less than .06%, in absolute terms, and the R² values were above 95%. Also the scatter diagram showed that the predicted and experimental values were close to the 45^o line.

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