Modeling and Optimization of Process Parameters of Friction Stir Welding of Al-Li Alloy AA2050 by Response Surface Methodology
How to Cite?
Raju Kamminana, Venkatasubbaiah Kambagowni, "Modeling and Optimization of Process Parameters of Friction Stir Welding of Al-Li Alloy AA2050 by Response Surface Methodology," International Journal of Engineering Trends and Technology, vol. 69, no. 5, pp. 208-227, 2021. Crossref, https://doi.org/10.14445/22315381/IJETT-V69I5P228
The third generation heat treatable Al-Li alloy AA2050 has extensive applications in automotive, defense, and air-craft industries due to its excellent corrosion resistance and high strength-to-weight ratio. Friction stir welding (FSW) is a novel solid-state joining technique suitable for aluminum alloys compared to conventional fusion welding techniques. This investigation presents the development of mathematical models with four numerical process parameters (traverse speed, rotational speed, tilt angle, and shoulder diameter) and one categorical process parameter (tool pin profile) to predict the responses of the friction stir weld joint of AA2050-T84, viz tensile strength, yield strength, elongation, hardness, bending load and width of the heat-affected zone. The optimal (combined) design was used to design the experiments with five factors and four levels. Analysis of variance was used to validate the developed mathematical models, and the desirability approach in response surface methodology (RSM) was used to find the optimum parameters of the multi-response problem.
Friction stir welding, analysis of variance, desirability approach, multi-response optimization, response surface methodology
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