Influence of Stress Relieving by Vibration on the Fatigue Behaviour of Welded Joints in Comparison to Post‐weld Heat Treatment

Sonsino, Cetin Morris; Back, Jong-Hoon; Gresnigt, A.M.

doi:10.1111/j.1460-2695.1996.tb01315.x

Cited by 17 publications

(10 citation statements)

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“…In this method, the welded object is simply vibrated strongly using motorised or electromagnetic equipment. Despite many years of research, there is still disagreement over the fundamental mechanism by which this acts to reduce stresses, or indeed whether it has any significant effect at all [98,99]. It has been proposed that VSR provides a driving force for dislocation movement at the intra-granular level [100], or even that it initiates a martensitic transformation in steels [101].…”

Section: Vibratory Stress Reliefmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. AbstractSelf-equilibrating residual stresses may occur in materials in the absence of external loading due to internal strain inhomogeneity. While favourable distributions of residual stress can bestow an object with the appearance of superior material properties, most welding processes leave behind residual stresses in particularly unfavourable patterns, causing a greater susceptibility to fracture-based failure mechanisms and unintended deformation. Currently, heat treatment is the primary means of removing these stresses, but since the formation of residual stress is dependent upon many material and process factors, there are several other viable mechanisms (using thermal, mechanical or phase transformation effects) by which it may be modified. It is only now, using relevant advances in numerical and experimental methods, that these techniques are being fully explored. This article gives a brief introduction to weld-induced residual stresses and reviews the current state-of-the-art with regard to their reduction. Emphasis is placed on the recent development of unconventional techniques, and the mechanisms by which they act.

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Section: Vibratory Stress Reliefmentioning

confidence: 99%

Contemporary approaches to reducing weld induced residual stress

Coules

2013

Materials Science and Technology

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“…The results of those investigations were mixed, in that some found a reduction in residual stresses and the others concluded with a negative comment. Bühler and Pfalzgraf [7], Shanker et al [8], Sonsino et al [9], Wozney and Crawmer [10], Houck [11], Botros [12], Rich [13] and Fenghua and Dexin [14] have all reported on 'post-weld' treatments. Bühler and Pfalzgraf [7] reported negative results.…”

Section: Background Of This Researchmentioning

confidence: 99%

“…Fenghua and Dexin [14] found a signi cant reduction in residual stress due to vibratory treatment, whereas arti cial ageing showed a lower reduction than the VSR treatment. Sonsino [9] found a very small or negligible reduction in residual stress and commented that VSR could not replace heat treatment.…”

Section: Background Of This Researchmentioning

confidence: 99%

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

Munsi

Waddell

Walker

2001

Proceedings of the Institution of Mechanical Engineers, Part L:

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Previous studies have suggested that weld microstructure may be modi ed by the presence of static stresses. In this investigation, vibratory stress was applied to mild steel specimens while they were being welded to observe its effect on the residual stress, microstructure and hardness of the material. Residual stresses were found to decrease in response to vibration whether it was applied during welding or after welding. It was found that the applied stress in uenced the grain growth process in the weld. As a result of the treatment the hardness of the material was found to be increased by 25 per cent.

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“…Li et al [15] studied the effect of VSR on the welded components of DH36 high strength low alloy steel, with the results showing that the residual stress of the weld toe is reduced by 29-72% after VSR treatment; the metallographic structure is not changed much, but the dislocations increase. Sonsino et al [16] pointed out that the fatigue life of the parts after VSR is equivalent to that after high temperature thermal aging, but the residual stress elimination effect is not as good as the thermal aging.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress Relief for 2219 Aluminum Alloy Weldments: A Comparative Study on Three Stress Relief Methods

Chen

Zhang

et al. 2019

Metals

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Thermal stress relief (TSR), vibration stress relief (VSR), and thermal and vibratory Stress relief (TVSR) have all been proven to be effective for residual stress relief. So far, no comparison has been made between the effects on residual stress relief of these three stress release methods. In this study, twelve 2219 aluminum alloy welding samples were divided into four groups. One of the groups is used as a reference without any stress relief treatment. The other three groups were processed by TSR, VSR, and TVSR, respectively. The residual stresses of depths of 0–1.2 mm are measured. Results show that small and uniform stresses are observed in the 2219 aluminum alloy welding samples after TSR, VSR, and TVSR treatment. TSR treatment decreased the peak residual stress much more than VSR and TVSR treatment. The maximum reduction of the peak residual stress is 50.8% (210 °C) in the transversal direction and 42.02% (185 °C) in the longitudinal direction after TSR treatment with the temperature range 140 °C to 210 °C. In terms of residual stress homogenization, although the TSR treatment has an advantage perpendicular to the weld direction, the effect parallel to the weld direction is not ideal. The TVSR has a good effect in both directions.

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Influence of Stress Relieving by Vibration on the Fatigue Behaviour of Welded Joints in Comparison to Post‐weld Heat Treatment

Cited by 17 publications

References 0 publications

Contemporary approaches to reducing weld induced residual stress

Contemporary approaches to reducing weld induced residual stress

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

Residual Stress Relief for 2219 Aluminum Alloy Weldments: A Comparative Study on Three Stress Relief Methods

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