Title: Modelling bead width and bead hardness in submerged arc welding using dimensional analysis

Authors: Abhijit Saha; Subhas Chandra Mondal

Addresses: Department of Production Engineering, Haldia Institute of Technology, Haldia, 721657, India ' Department of Mechanical Engineering, Indian Institute of Engineering Science and Technology, Shibpur, 711103, India

Abstract: The submerged arc welding (SAW) process finds wide industrial application due to its easy applicability, high current density and ability to deposit a large amount of weld metal using more than one wire at the same time. This paper presents the application of two techniques, namely, Rayleigh's dimensional analysis for modelling and grey relational analysis (GRA) for multi-objective optimisation for bead width and bead hardness in SAW based on welding parameters such as, welding current, arc voltage, welding speed and electrode stick out respectively. Based on the experimental result, it was concluded that GRA is suitable for the optimisation of multi-response problem. The best-fitting curves were obtained for experimentally observed values of both bead width and bead hardness on the basis of the Rayleigh's model. The comparison with experimental results will also served as further validation of the model. The proposed methodology can be applied to other manufacturing processes dealing multivariate data.

Keywords: submerged arc welding; SAW; Rayleigh's theorem; dimensional analysis; grey relational analysis; GRA; bead width; bead hardness.

DOI: 10.1504/IJMTM.2022.121578

International Journal of Manufacturing Technology and Management, 2022 Vol.36 No.1, pp.13 - 27

Accepted: 19 Jan 2018
Published online: 21 Mar 2022 *

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