Bead Geometry Prediction Model for 9% Nickel Laser Weldment, Part 1: Global Regression Model vs. Modified Regression Model

Due to its excellent toughness and stiffness in cryogenic conditions, 9% nickel steel is applied LNG storage facilities, usage increasing as a result of changes environmental regulations. A study was conducted on the development predictive model optimize laser welding process steel, two prediction models were developed using one hundred data points obtained through experiments. global regression used general modified p-value analysis variance developed, their performance compared. It found that superior terms predicting bead shape, including parameters such penetration depth, height, area ratio.