Vibration assisted welding processes and their influence on quality of welds

Abstract

Vibration assisted welding (VAW) has emerged as a successful replacement for heat treatments and post-weld vibration treatments of arc welds to reduce residual stresses and distortions and thus to improve its mechanical properties. This review paper tries to create a knowledge platform for such a next generation research by consolidating the findings, merits, demerits and shortfalls identified hitherto in the field of VAW. This paper presents a review on the various techniques and processes of applying vibration to the welding system and their effects on microstructure, mechanical properties and residual stress of welds, and the directions for future research are presented. Vibration of workpiece during welding, oscillation of weld pool, oscillation of molten droplet, oscillation of welding arc and vibration of welding electrode were identified from the literature as the possible ways of imparting vibration. The advancement in the direction of computational work is also observed.

Investigation on the effect of mechanical vibration in mild steel weld pool

“…Frequency has 1st rank, speed shows 2nd and current shows 3rd rank which indicate that the most influencing factor is frequency than welding speed and at last welding current. To validate the Taguchi's report, Analysis of Variance (ANOVA) technique has been applied and the percentage contribution [34,37,38] of each process parameters on the hardness value is calculated with the help of equation (2).…”

“…Vibratory welding technique is the process of transferring the vibrations into the molten weld pool through various modes of vibratory setup. Various researches have performed on the vibratory welding techniques to improve the microstructure and mechanical properties of the weld joints [2]. In arc welding, vibration can be applied either during or after the process.…”

Study of a Welding Pool Harmonic Oscillations Influence on the Welded Metal Hardness and Weld Bead Width

“…A control tool is a welding torch or a melt of a weld pool on which a periodic influence in the form of vibrations or vibrations is superimposed. Crystallization of the weld pool metal in such conditions contributes to the formation of a fine-grained structure of the weld metal and directional crystal growth it is reasons to obtaining high mechanical properties [1][2][3].…”

“…The method of imposing oscillations (vibrations) can be mechanical, i. e. when the weld pool [1][2][3][4][5][6][8][9][10] or the welding tool [2,7] oscillates during the process of welding or surfacing; the use of modulated welding current (pulsed current) [11]; periodic influence of an external magnetic field [12], which in a certain way influences the melt of the weld pool, the welding arc [13] or the laser beam [14].…”

A Study on the Microstructure and Fatigue Properties of Welding Joints in Vibration‐Assisted Laser Welding Process

“…Vibration‐assisted welding (VAW) came from the development of vibration aging; it has developed rapidly in recent years, from the research results at home and abroad, the role of vibration could be expressed as follows: refine the structure, optimize the joint performance, release residual stress, and improve fatigue performance . Barooni et al applied vibration to the FSW of AA6061‐T6 aluminum alloy in the vertical welding direction to explore its effects.…”