摘要：The paper focuses on developing mathematical model to predict Ultimate Tensile Strength of pulsed current micro plasma arc welded Inconel 625 nickel alloy. Four factors, five level, central composite rotatable design matrix is used to optimize the number of experiments. The mathematical model has been developed by Response Surface Method (RSM) and its adequacy is checked by Analysis of Variance technique (ANOVA). By using the developed mathematical model, Ultimate Tensile Strength of the weld joints can be predicted with 99% confidence level. The results indicate that peak current has the greatest influence on Ultimate Tensile Strength followed by pulse, back current and pulse width. The developed mathematical model has been optimized using Hooke and Jeeves Method to maximize the Ultimate Tensile Strength of pulsed current micro plasma arc welded Inconel 625 alloy.pulsed current micro plasma arc welded Inconel 625 alloy.
关键词：Pulsed Current Micro Plasma Arc Welding; Inconel 625; Ultimate Tensile Strength; Design of Experiments; Hooke and Jeeves method.
