Effect of Auxiliary Vibrations on Microhardness Properties of MIG Welded MS Plate Joints
Keywords:
Auxiliary vibrations, Vibratory set up, Mechanical Vibrations, Microhardness, MIG welding process.Abstract
The aim of this present study is to investigate the influence of inducing auxiliary vibrations into the weld pool during butt welding of 6 mm thick Mild Steel plates using MIG welding process. An auxiliary vibratory set up was developed which comprised of a metallic tip of tungsten that could be mechanically vibrated by a primary vibratory source which resulted into vibrations of around 150 Hz. While welding was carried out, the motion of the vibratory tip was immersed in the weld pool and synchronized in such a way that it trailed the welding arc by around 4-6 mm. The mechanical strength of these joints was evaluated by conducting through micro hardness test. Test result shown that by applying vibratory treatment Hardness value increased without any loss of ductility.
References
2. Mostafapour A, Gholizadeh V. Experimental investigation of the effect of vibration on mechanical properties of 304 stainless steel welded parts. Int J Adv Manuf Technol 2014; 70: 1113–24.
3. Chih-Chun H, Chuien-Hong L, Weite W. Effect of vibration on microstructure and mechanical properties of 304 Stainless steel GTA welds. Met Mater Int 2013; 19: 835-44.
4. Davis GJ; Garland JG. Solidification structure and properties of fusion welding. Int Metall Rev 1975; 20: 83-106. 5. Vives CH. Affect of electromagnetic vibration on the microstructure of continuously cast alloys. Material Science Eng A 1993; 173: 169-72.
6. Balasubramanian K. Studies on effect of vibration on hot cracking and grain size in AA7075 aluminum alloy welding. Int J Eng Sci Technol 2011; 3(1): 681–86.
7. Kou S, Le Y. Improving weld quality by low frequency arc oscillation. Welding Journal 1985; 64(3): 51–55.
8. Sobolev VV. Study of liquid solidification during the welding process in the
ultrasonic field. Metal Abstract 1995; 550159: 203.
9. Lu Q, Chen L, Ni C. Effect of vibratory weld conditioning on welded valve properties. Mechanics of Materials 2008; 40: 565–74.
10. Jijin X, Ligong C, Chunzhen N. Effect of vibratory weld conditioning on the residual stresses and distortion in multipass girthbutt welded pipes. International Journal of Pressure Vessels and Piping 2007; 84: 298–303.
11. Spooner S, David SA, Wang XL et al. Effect of vibratory stress relief during welding of thick stainless steel plate, Conference: 931234-6, 1994
