Optimization of vibratory welding process parameters using response surface methodology
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The current investigation was carried out to study the effect of vibratory welding technique on mechanical properties of 6 mm thick butt welded mild steel plates. A new concept of vibratory welding technique has been designed and developed which is capable to transfer vibrations, having resonance frequency of 300 Hz, into the molten weld pool before it solidifies during the Shielded metal arc welding (SMAW) process. The important process parameters of vibratory welding technique namely welding current, welding speed and frequency of the vibrations induced in molten weld pool were optimized using Taguchi’s analysis and Response surface methodology (RSM). The effect of process parameters on tensile strength and hardness were evaluated using optimization techniques. Applying RSM, the effect of vibratory welding parameters on tensile strength and hardness were obtained through two separate regression equations. Results showed that, the most influencing factor for the desired tensile strength and hardness is frequency at its resonance value, i.e. 300 Hz. The micro-hardness and microstructures of the vibratory welded joints were studied in detail and compared with those of conventional SMAW joints. Comparatively, uniform and fine grain structure has been found in vibratory welded joints.
KeywordsANOVA Hardness property RSM SMAW Taguchi analysis Vibratory welding technique
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- S. Kou and Y. Le, Nucleation mechanism and grain refining of weld metal, Welding Journal, 65 (1986) 63–70.Google Scholar
- M. Malinowaski-Brodnicka, G. Den and W. J. Wink, Effect of magnetic fields on GTA welds in austenitic stainless steel, Welding Research Supplement, 52 (1990) 52–59.Google Scholar
- A. Munsi, A. J. Waddell and C. A. Walker, The effect of vibratory stress on the welding microstructure and residual stress distribution, Journal of Materials: Design and Application, 215 (2001) 99–111.Google Scholar
- Y. Cui and X. Cl, Effect of ultrasonic vibration on un mixed zone formation, Scripta Mater., 55 (2006) 957–958.Google Scholar
- K. Balasubramanian and V. Balusamykeshavan, Studies on the effect of vibration on hot cracking and grain size in AA7075 Aluminum alloy welding, International Journal of Engineering Science and Technology, 3 (2011) 681–686.Google Scholar
- P. G. Rao, P. S. Rao, A. G. Krishna and M. M. M. Sarkar, Affect of vibratory welding process to improve the mechanical properties of butt welded joints, International Journal of Modern Engineering Research, 2 (2014) 2766–2270.Google Scholar
- A Krajewski, W. Wlosinski, T. Chmielewski and P. Kolodziejczak, Ultrasonic vibration assisted arc-welding of aluminum alloys, Bulletin of the Polish Academy of Sciences and Technical Sciences, 4 (2012) 841–852.Google Scholar
- C.-C. Hsieh, P.-S. Wang, J.-S. Wang and W. Wu, Evolution of microstructure and residual stress under various vibration modes in 304 Stainless steel welds, The Scientific World Journal(2014).Google Scholar
- S. D. Kumar, P. R. Vundavilli and A. Mandal, Optimization of process parameters during machining of Thixoformed A 356-5TiB2 in-situ composite using design of experiments, International Conference on RACE 2015, Chennai(2015).Google Scholar
- P. K. Singh, D. Patel and S. B. Prasad, Development of vibratory welding technique and tensile properties investigation of Shielded metal arc welded joints, Indian Journal of Science and Technology, 9 (2016) 35.Google Scholar