Title: The response surface approach of optimising the pulsed-current Gas Tungsten Arc welding parameters to attain maximum impact toughness

Authors: M. Balasubramanian, V. Jayabalan, V. Balasubramanian

Addresses: Department of Mechanical Engineering, Maamallan Institute of Technology, Sriperumpudur – 602105, Tamilnadu, India. ' Department of Manufacturing Engineering, Anna University, Guindy, Chennai – 600 025, India. ' Department of Manufacturing Engineering, Annamalai University, India, Annamalai Nagar – 608 002, India

Abstract: Process modelling refers to the development of a process model that serves to provide the input-output relationship of a process, while process optimisation provides the optimum operating conditions of a process for a high-yield, low-cost and robust operation. Normally, process modelling is a starting point of process optimisation. Regression analysis is used to develop process models, while the Karush-Kuhn-Tucker (K-K-T) conditions, response graphs and contour plots are used in process optimisation. The application of the method to the modelling and optimisation of impact toughness is described. To illustrate the proposed approach, experimental results are provided.

Keywords: gas tungsten arc welding; pulsed current GTAW; contour plots; response surface plots; titanium alloys; impact toughness; process modelling; process optimisation.

DOI: 10.1504/IJMMP.2008.022617

International Journal of Microstructure and Materials Properties, 2008 Vol.3 No.6, pp.823 - 836

Published online: 19 Jan 2009 *

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