Optimisation and sensitivity analysis of friction stir welding process and tool parameters for joining AA1100 aluminium alloy Online publication date: Fri, 27-May-2011
by S. Rajakumar, C. Muralidharan, V. Balasubramanian
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 6, No. 1/2, 2011
Abstract: This paper focuses on the development of empirical relationship for the prediction of tensile strength of friction stir welded AA 1100 aluminium alloy joints. The experimental part of the study is based on five level central composite designs of six (process and tool) parameters. Optimisation of the model is carried out to maximise the tensile strength using design-expert software. A sensitivity analysis is carried out and compared the relative impact of input parameters on tensile strength in order to verify the measurement errors on the values of the uncertainty in estimated parameters. The results obtained show that developed empirical relationship can be applied to estimate the effectiveness of process and tool parameters for a given tensile strength. The rotational speed is more sensitive than tool hardness, followed by axial force, shoulder diameter, pin diameter and welding speed.
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