"Linear Regression analysis with one parameter for the Estimation of Proof Stress for the TIG welded Al-65032"

regression analysis is an useful tool to establish relation between various input parameters and output parameters. The material properties of a weldment in TIG welding depend on welding parameters like shielding gas pressure, current, torch angle, electrode size, electrode projection, arc length etc. It is also influenced by the joint parameters like groove angle, land, root gap, preheating temperature. But a lot of noise parameters like variation of base material properties, variation in quality of inert gas used, variation in ambient conditions, variation in workman ship etc introduce the variability into the process. In the present work a linear regression analysis is carried out to predict Proof Stress of TIG welded Al-65032 with the variation of four parameters namely inert gas pressure, current, groove angle of the joint and preheating temperature of base metal one at a time. To minimise the no. of experiments in designing data base an L-9 orthogonal array is chosen for experimentation.