Optimization of laser butt welding parameters based on the orthogonal array with fuzzy logic and desirability approach |
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Authors: | Email author" target="_blank">P?SathiyaEmail author M?Y?Abdul?Jaleel D?Katherasan B?Shanmugarajan |
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Affiliation: | (1) Department of Production Engineering, National Institute of Technology, Tiruchirappalli, 620 015, Tamil Nadu, India;(2) International Advanced Research Centre for Powder Metallurgy, & New Materials, Hyderabad, 500 005, Andhra Pradesh, India |
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Abstract: | This paper presents the study carried out on 3.5 kW cooled slab laser welding of 904 L super austenitic stainless steel. The
joints had butts welded with different shielding gases like argon, helium and nitrogen at a constant flow rate. Super austenitic
stainless steel (SASS) normally contains high amount of Mo, Cr, Ni, N and Mn. The mechanical properties are controlled to
obtain good welded joints. The quality of the joint is evaluated by studying the features of weld bead geometry such as bead
width (BW) and depth of penetration (DOP). In this paper, the tensile strength and bead profiles (BW and DOP) of laser welded
butt joints made of AISI 904 L SASS are investigated. Taguchi approach is used as statistical design of experiment (DOE) technique
for optimizing the selected welding parameters. Fuzzy logic and desirability approach are applied to optimize the input parameters
considering multiple output variables simultaneously. Confirmation experiment has also been conducted for both the analyses
to validate the optimized parameters. |
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