Optimization of Fluence Energy in Relation to Weld Properties Based on Vogel Approximation Method

This paper explores the use of the Vogel Approximation Method to determine the best suitable Fluence energy that can produce a mild steel weld of acceptable Ultimate Tensile Strength (UTS). Although this model is most often utilised for optimizing facility location problems, in this study it is uniquely adapted to accurately determine and predict acceptable mild steel fluence energy weld parameters. The UTS was the mechanical property chosen in this study because it defines the ductility and malleability of the weldment, making it suitable for a wide range of engineering applications. In this study, a fluence energy of 3.79kW achieving a UTS of 506 MPa of weldment. W2 was obtained and found to be suitable. This value falls within an average range of 50 MPa/kW and 150 MPa/kW obtained by other investigators. Other properties were investigated such as the Micro-structural analysis, Brinell Hardness Number (BHN), Charpy V-Notch (CVN) Impact energy, and weld factor. The values obtained show that weldment W2 has the best weld quality. This study elucidates a step by step approach in the application of the Vogel Approximation Model in determining the optimized Fluence energy.