Estimation and Optimization of Tensile Strain in Mild Steel

Tensile strain is the relative length of deformation exhibited by a specimen subjected to a tensile force. The objective of this paper was to estimate and optimize tensile strain mild steel weldment using response surface methodology. 100 welded specimens of mild steel, measuring 60mm x 40mm x10mm were prepared and Universal Pull Tester used to determine the tensile strain of the welded specimen. The results of the various impacts withstood by the samples were fed into design expert 13, where the analysis and optimization were conducted in other to determine the optimal value for tensile strain for mild steel using Tungsten inert gas (TIG). The research produced an optimum process parameter of 180amps, 19volts and 16l/min for tensile strain of mild steel weldment with a second order quadratic model developed from the response surface methodology (RSM).