Grey Relational Analysis and Taguchi Method for the Parametric Optimization of Single Pass Friction Stir Welded Aluminum Alloy 7075-T6 Joints

Abstract:

Friction Stir Welding (FSW) is a solid state joining technique for both similar and dissimilar combination of materials. However, there is a scope in optimizing the process parameters involved in the FSW process. Taguchi based Grey Relational Analysis (GRA) has an impact in better optimization results when compared with other optimization techniques. In this present work totally 9 samples of single pass friction stir welded aluminium alloy were taken for the optimization process. The samples were subjected to various tool speeds and traverse speeds by keeping the axial force as constant. The experiments were planned using Taguchi’s orthogonal array selector in order reduce the multi responses involved in the FSW process. The final optimized values were correlated with the experimental values. It is revealed from results that the optimized process parameter showed a good agreement with the experimental values. The present work has also proved the feasibility of GRA in combination with Taguchi technique for better enhancement in the weldment and optimization of the process parameters.

• Periodical: Applied Mechanics and Materials (Volume 852)
• Pages: 331-336
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.852.331
• Online since: September 2016
• Authors: A. Varun Kumar*, M. Balasrinivasan, Mohamed Dulkiflee
• Keywords: Friction Stir Welding (FSW), Grey Relational Analysis (GRA), Optimization, Taguchi Method, Tensile Strength

References

[1] D.M. Rodrigues, A. Loureiro, C. Leitao, R.M. Leal, B.M. Chaparro, P. Vilaca Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds, Materials and Design, (2008).

DOI: 10.1016/j.matdes.2008.09.016

[2] G. Madhusudhan Reddy, P. Mastanaiah, C.V.S. Murthy, T. Mohandas, and N. Viswanathan Microstructure, Residual Stress Distribution and Mechanical Properties of Friction-Stir AA 6061 Aluminium Alloy Weldments, Indian Society for NDT, (2007).

DOI: 10.1007/s12666-009-0007-z

[3] Yutaka S. Sato, Hiroyuki Kokawa, Masatoshi Enomoto and Shigetoshi Jogan Microstructural Evolution of 6063 Aluminum during Friction- Stir Welding,. 1999, Vol 30A.

DOI: 10.1007/s11661-999-0251-1

[4] A. Barcellona, G. Buffa, L. Fratini, D. Palmeri On microstructural phenomena occurring in friction stir welding of aluminium alloys, Materials nad Processing Technology, 2006, pp.340-343.

DOI: 10.1016/j.jmatprotec.2006.03.192

[5] C. Yeni, S. Sayer, O. Ertugrul, M. Pakdil Effect of post-weld aging on the mechanical and microstructural properties of friction stir welded aluminum alloy 7075, Archives of Materials Science and Engineering, 2008, pp.105-109.

[6] Latrobe Specialty Steel Company, Latrobe PA 15650-0031 USA. (http: /www. latrobesteel. com/assets/documents/datasheets/LSS_D3. pdf).

[7] ASM Aerospace Specification Metals Inc, 2014. (http: /asm. matweb. com/search/SpecificMaterial. asp?bassnum=MA7075T6).

[8] L. Karthikeyan, V.S. Senthil Kumar Relationship between process parameters and mechanical properties of friction stir processed AA6063-T6 aluminum alloy, Materials and Design, 2011, pp.3085-3091.

DOI: 10.1016/j.matdes.2010.12.049

[9] K. Kumar, Satish V. Kailas, On the role of axial load and the effect of interface position on the tensile strength of a friction stir welded aluminium alloy, Materials and Design, 2008, Vol. 29, pp.791-797.

DOI: 10.1016/j.matdes.2007.01.012

[10] P M G P Moreira, T Santos, S M O Tavares, V Richter-Trummer, P Vilaça, P M S T de Castro Mechanical Characterization of Friction Stir Welds of Two Dissimilar Aluminium Alloys of the 6xxx Series, Materials Science, 2008, pp.430-434.

DOI: 10.4028/www.scientific.net/msf.587-588.430

[11] S. Rajakumar, C. Muralidharan, V. Balasubramanian, Influence of friction stir welding process and tool parameters on strength properties of AA 7075-T6 aluminium alloy joints, Materials and Design, 2011, Vol. 32, Issue 2, pp.535-549.

DOI: 10.1016/j.matdes.2010.08.025

[12] Hakan Aydin, Ali Bayram, Ugur Esme, Yigit Kazancoglu, Onur Guven Application of Grey Relation Analysis (GRA) and Taguchi Method for the Parametric Optimization of Friction Stir Welding (FSW) Process, 2010, pp.1580-2949.

[13] A. Varun Kumar, K. Balachandar, Effect of welding parameters on metallurgical properties of friction stir welded aluminium alloy 6063-O, J. App Sciences, 2012, Vol. 12, Issue 12, pp.1255-1264.

DOI: 10.3923/jas.2012.1255.1264

[14] Z. Zhang, H. W. Zhang, Numerical studies on the effect of transverse speed in friction stir welding, Materials and Design, 2008, Vol. 30, pp.900-907.

DOI: 10.1016/j.matdes.2008.05.029