Open Access Open Access  Restricted Access Subscription or Fee Access

Multi-objective Optimization of Weld Bead Geometry of Micro-plasma Arc Welded Titanium (Ti–6Al–4V) Alloy Sheets Using TOPSIS

M. Sumalatha, V.V.S. Kesava Rao

Abstract


Titanium alloys are used in the manufacturing of aero engine components for their attractive, combined properties such as lightness, good strength-to-density ratio, corrosion resistance. In the present paper, titanium (Ti–6Al–4V) alloy sheets are butt welded using micro-plasma arc welding. Peak current, base current, pulse rate, and pulse width are considered as weld input parameters and weld bead geometry parameters, namely front width, back width, front height, back height, are considered as output responses. Four factors and five levels are considered. Taguchi L25 orthogonal matrix is adopted and 25 experiments are performed. Weld bead geometry parameters are measured using metallurgical microscope. Empirical mathematical models are developed using statistical software (MINITAB). Analysis of variance is carried out at 95% confidence level. Effects of welding parameters on bead geometry parameters were studied. Multi-objective optimization of weld bead geometry parameters was carried out using TOPSIS.

Keywords


Pulsed current; Micro Plasma Arc Welding; Titanium (Ti-6Al-4V); Weld bead geometry; TOPSIS

Full Text:

PDF

References


Donachie MJ. Titanium: A Technical Guide, 2nd ed. Materials Parks, OH: ASM International; 2000.

Karimzadeh F, Salehi M, Saatchi A, Meratian M. Effect of microplasma arc welding process parameters on grain growth and porosity distribution of thin sheet Ti6Al4V alloy weldment. Mater Manuf Proc. 2005; 20(2): 205–219p.

Karimzadeh F, Ebnonnasir A, Foroughi A. Artificial neural network modeling for evaluating of epitaxial growth of Ti6Al4V weldment. Mater Sci Eng A. 2006; 432: 184–190p.

Lyra e Silva JP1, Fernandes Neto AJ, Raposo LH, Novais VR, de Araujo CA, Cavalcante Lde A, Simamoto Júnior PC. Effect of plasma welding parameters on the flexural strength of Ti-6Al-4V alloy. Braz Dent J. 2012; 23(6): 686–691p.

Balasubramanian TS, Balasubramanian V, Muthumanikkam MA. Effect of welding processes on fatigue properties of Ti-6Al-4V alloy joints. Int J Mech Aerosp Ind Mechatron Manuf Eng. 2011; 5(2): 427–436p.

Mishra D, Manjunath A, Parthiban K. Interpulse TIG Welding of Titanium Alloy (Ti-6Al-4V). Indian Weld J. 2017; 50(4): 56–71p.

Siva Prasad K, Shrinivas Rao Ch, Nageswara Rao D. Application of grey relational analysis for optimizing weld pool geometry parameters of pulsed current micro plasma arc welded Inconel 625 sheets. Int J Adv Manuf Technol. 2015. DOI 10.1007/s00170-014-6665-y.

Siva Prasad K, Srinivasa Rao CH, Nageswara Rao D. Effect of process parameters of pulsed current micro plasma arc welding on weld pool geometry of Inconel 625 welds. Kovove Mater Metall Mater. 2012; 0(3): 153–159p.

Siva Prasad K, Srinivasa Rao Ch, Nageswara Rao D. Application of grey relational analysis for optimizing weld pool geometry parameters of pulsed current micro plasma arc welded AISI 304L stainless steel sheets. Int J Adv Des Manuf Technol. 2013; 6(1): 79–86p.

Hwang CL, Yoon K. Multiple Attribute Decision Making. Berlin: Springer-Verlag; 1981.

Behzadian M, Otaghsara SK, Yazdani M, Ignatius J. A state-of the-art survey of TOPSIS applications. Expert Syst Appl. 2012; 39: 13051–13069p.

Chen MF, Tzeng GH. Combining grey relation and TOPSIS concepts for selecting an expatriate host country. Math Computational Model. 2004; 40: 1473–1490p.




DOI: https://doi.org/10.37628/ijmmp.v5i1.805

Refbacks

  • There are currently no refbacks.