Experimental investigation of the effect of vibration on mechanical properties of 304 stainless steel welded parts
- 386 Downloads
Some of the problems that occur during the welding process include the creation of coarse grains in the weld structure and the hardening of the weld region, which reduce the strength and impact resistance of the welded parts. One technique to improve the mechanical properties of weld is the application of mechanical vibration to the molten pool. In this article, the effect of vibrating the part during welding on the mechanical properties of steel plates has been investigated in the tungsten inert gas (TIG) welding process. The plate is made of stainless steel 304 with 2 mm in thickness. A filler material has also been used for welding so that the effect of vibration can be observed on the weld pool region. The experimental tests have been performed under different welding conditions with respect to voltage, current, welding speed, vibrations amplitude, and frequency. Then, the resultant mechanical properties of the tested parts were measured. Also, the microstructure obtained by applying the vibration has been examined. Based on these experimental results, the effect of mechanical vibration on mechanical properties of the weld was investigated. Moreover, considering the mechanical properties obtained from these experiments, the optimum values of amplitude, frequency, and welding speed were determined.
KeywordsWelding Mechanical vibration Mechanical properties Microstructure 304 stainless steel
Unable to display preview. Download preview PDF.
- 1.Madhusudhan Reddy G, Gokhale A, Prasad Rao K (1998) Optimization of pulse frequency in pulsed current gas tungsten arc welding of aluminum-lithium alloy sheets. J Mater Sci Technol 14:61–66Google Scholar
- 3.Pearce, B. P., Kerr, H. W., (1981), Grain refinement in magnetically stirred GTA welds of aluminum alloys, Metallurgical and Materials Transactions, 12 B, N0. 3, 479–486Google Scholar
- 4.Davis GJ, Garland JG (1975) Solidification structures and properties of fusion welding. Int Metall Rev 20:83–106Google Scholar
- 7.Tewari SP (2009) Influence of longitudinal oscillation on tensile properties of medium carbon steel welds of different thickness. Thammasat Int J Sc Tech 14(4):17–27Google Scholar
- 8.Balasubramanian K (2011) Studies on effect of vibration on hot cracking and grain size in AA7075 aluminum alloy welding. Int J Eng Sci Technol (IJEST) 3(1):681–686Google Scholar
- 9.Bradley N (2007) The Response Surface Methodology, Master of Science Thesis, Department of Mathematical Sciences, Indiana University of South BendGoogle Scholar
- 10.Montgomery DC (2001) Design and Analysis of Experiments, 5th Ed, John Wiley, ISBN 0-471-31649-0Google Scholar
- 12.Harvey, Philip D (1982) Engineering Properties of Steel, American Society for MetalsGoogle Scholar