Optimisation of cobalt-based hardfacing in carbon steel using the fuzzy analysis for the robust design

Abstract

In this paper, we present the application of the fuzzy logic analysis to a Taguchi orthogonal experiment for developing a robust model with high efficiency in multiple performance characteristics (MPCs) of the plasma transfer arc welding (PTAW) hardfacing process. It eliminates uncertain information and is a simple, effective, and efficient approach. A fuzzy logic system is used to simultaneously investigate relationships between various MPCs and to determine the efficiency of each trial of the Taguchi experiments. From the fuzzy inference process, we are able to determine the optimal setting of factor-levels for the MPCs. In addition, we also use the analysis of variance (ANOVA) to identify the significant factors, which coincide with findings from the fuzzy logic analysis and are found to account for about 79% of the total variance. Furthermore, a confirmation experiment of the optimal process is conducted, and it verifies that both individual performance characteristics and MPCs are successfully optimized and satisfy our desired levels of MPCs.Keywords Analysis of variance (ANOVA) 9 Fuzzy logic 9 Hardfacing 9 Multiple 9 Normalization performance characteristic indices (MPCI) 9 Plasma transfer arc welding (PTAW)

Fuzzy rule-based modeling of machining parameters for surface roughness in turning carbon particle-reinforced polyamide

“…In this study, for the prediction of machining parameters in turning carbon particlereinforced PA, fuzzy logic is used. Jen-Ting Wang and Ming-Der Jean 21 state that fuzzy logic is basically similar to the linguistic variables that are found in the human language. Fuzzy logic is an inexact reasoning, which allows us to model the human reasoning process in linguistic form.…”

Effect of Spherical Tungsten Carbide Load to the Corrosion Behaviour of Plasma Transfer Arc Hard Facing in Acidic and Alkaline Environment

“…The plasma transferred arc welding (PTAW) allows the deposition of a wider compositional scale of metallic and composite hard facings using powder form consumables, as opposed to wire or ascast rods [1]. Compared with other welding techniques, PTAW requires lower electrical arc output power [2]. PTAW presents the advantage of being able to produce thicker hard facings as reported by d'Oliveira et al [3] when compared to laser cladding.…”

A Fuzzy Multiple Regression Approach for Optimizing Multiple Responses in the Taguchi Method

“…Recently, the optimization of multiple responses in the Taguchi method has received significant research attention. Several techniques are adopted for this purpose, including a trade-off between quality loss and productivity (Phadke, 1989), multiple response S/N ratio (Antony, 2001;Lin, 2002;Al-Refaie et al, 2010), data envelopment analysis (Al-Refaie et al, 2009), grey relational analysis and desirability function approach (Lin, 2004;Palanikumar et al, 2006;Pan et al, 2007;Al-Refaie et al, 2008;Lin & Lee, 2009;Chen et al, 2010), principal components analysis (Tong et al, 2005;Fung & Kang, 2005;Huang & Lin, 2008;Gauri & Chakraborty, 2009), fuzzy logic approach (Tarng et al, 2000;Lin & Lin, 2005;Wang & Jean, 2006;Chang & Lu, 2007), and multiple regression-based integration approach (Gopalsamy et al, 2009;Pal & Gauri, 2010). Although statistical regression has many applications (Shu et al, 2006;Gopalsamy et al, 2009), problems can still occur in the following situations, including number of observations is inadequate (small data set), difficulties verifying distribution assumptions, vagueness in the relationship between input and output variables, ambiguity of events or degree to which they occur, and inaccuracy and distortion introduced by linearization.…”