The effect of vibratory stress on the welding microstructure and residual stress distribution

Munsi, A.S.M.Y.; Waddell, A.J.; Walker, C.A.

doi:10.1177/146442070121500204

Cited by 17 publications

(11 citation statements)

References 8 publications

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“…Whether vibration is induced during welding or post-welding (as in the case of VSR), the stress relief is not a direct result of the LVE, but rather a byproduct of the structural response that yields plastic deformations around the weld areas, thus achieving stress relief. This has been supported by References [9,10,11,12,13,14] and few cycles are enough, as demonstrated in References [11,15,16] and the experimental setups for GVE [10,14,15]. In the case of simultaneous vibration and welding, the weld area is further heated, which causes the yield strength to drop significantly, implying that under the same strain magnitude, the material will be more prone to plastic deformation.…”

Section: Discussionmentioning

confidence: 67%

The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

et al. 2019

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The use of vibratory welding is treated with some caution in the industry due to inconsistent beneficiary results. Here, a partial explanation is suggested by the differentiation between global vibrational effects (GVEs) and local vibrational effects (LVEs), and the latter is investigated experimentally. Two structural plates of steel are welded at three frequency/amplitude combinations using manual gas metal arc welding in an experimental setup that ensures only LVEs. After welding, tensile tests, microhardness tests, and metallurgical characterization are performed locally in the different welding zones and the results are compared to the non-vibrated welds. Novel use of digital image correlation (DIC) is implemented in tensile testing of welded samples, thus enabling the separate determination of local mechanical properties of the base metal, heat-affected zone and fusion zone of the same weld. LVE is found not to promote any distinct difference in weld properties, at least within the vibrational regimes studied. Nevertheless, depending on geometry and structural response, it is explained how vibratory welding may promote residual stress relief due to GVEs of the welded structure.

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Section: Discussionmentioning

confidence: 67%

The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

et al. 2019

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“…4 Munsi et al applied vibratory stress on low carbon steel workpieces during welding and observed that if vibration is applied during or after welding, residual stresses get reduced. 5 They also reported that the grain growth process in the weld is also influenced by this applied vibratory stress. Gu¨lenc¸et al 6 investigated the effect of welding current and shielding gas (Ar mixed with different proportion of H 2 ) on tensile strength, toughness and microstructure of AISI 304 welded joints.…”

Section: Introductionmentioning

confidence: 93%

Effect of process parameters on toughness and metallurgical behaviour during uniaxial automatic gas metal arc welding of austenitic stainless steel AISI 316

Bhattacharya

Bera

Suri

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

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Gas metal arc welding (GMAW) is extensively used for joining of different graded steels as well as aluminium and other nonferrous materials. GMAW offers clean welding with low defects without using flux and suitable for different positional welding. In the present work, a fabricated automatic movement setup is used for GMAW to study the influences of four different process parameters during joining of austenitic stainless steel AISI 316 using AISI 304 (ER304) filler wire. With this setup, welding is carried out maintaining a constant contact tube-to-workpiece (CTW) distance and uniform heat input. Experimental results and subsequent analysis show that the toughness is most significantly influenced by voltage followed by welding speed, gas flow rate, and current. Toughness reduces with the increase in shielding gas flow rate and welding speed as austenite and traces of retained delta ferrite may be present due to high solidification rate. Metallurgical observations by X-ray diffraction (XRD) and scanning electron microscopy indicate that solidification mode is mainly characterized by formation of fully austenite or austenite and ferrite at cell and dendritic boundaries. XRD results revealed that higher toughness is observed due to minimum formation of carbides.

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“…When vibration was applied to cold rolled mild steel specimens during MIG welding, it resulted in grain refinement, reduction in residual stress and increase in hardness. 29 The frequency of vibration was maintained at 25 Hz during vibratory welding. Heat input, welding speed and time of vibration were also kept constant, and amplitude was varied.…”

Section: Effect On Mechanical Propertiesmentioning

confidence: 99%

Vibration assisted welding processes and their influence on quality of welds

Jose

Kumar

Sharma

2016

Science and Technology of Welding and Joining

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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.

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The effect of vibratory stress on the welding microstructure and residual stress distribution

Cited by 17 publications

References 8 publications

The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

The Effect of Localized Vibration during Welding on the Microstructure and Mechanical Behavior of Steel Welds

Effect of process parameters on toughness and metallurgical behaviour during uniaxial automatic gas metal arc welding of austenitic stainless steel AISI 316

Vibration assisted welding processes and their influence on quality of welds

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