Vibratory weld conditioning — the effect of rigid body motion vibration during welding

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

doi:10.1111/j.1475-1305.1999.tb01152.x

Cited by 15 publications

(14 citation statements)

References 2 publications

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“…An alloy composed of copper and nickel subjected to vibration welding revealed clearly visible structural refinement resulting in a different arrangement of dendrites. Vibration welding involving unalloyed ferritic steel performed using dynamic excitation at a frequency of 50 and that of 500 Hz in the direction transverse in relation to the weld did not result in any relaxation of welding stresses along or across the weld axis [16]. The welding of austenitic steel 304 performed using a frequency of 39.4 Hz decreased the precipitation of ferrite δ and reduced residual stresses by approximately 20%.…”

Section: Present Statementioning

confidence: 86%

“…The test results and conclusions presented in this study are concerned with various structural test materials including aluminium alloys [6,10], nickel alloys [12], austenitic steels [18] and structural steels [7,16]. Materials of each of the above-presented groups are characterised by various thermomechanical properties, various crystallisation mechanisms and, undoubtedly, various behaviour during the transition from the liquid to the solid state, which in turn may lead to varied effect on the properties of welded joints.…”

Section: Present Statementioning

confidence: 99%

“…Materials of each of the above-presented groups are characterised by various thermomechanical properties, various crystallisation mechanisms and, undoubtedly, various behaviour during the transition from the liquid to the solid state, which in turn may lead to varied effect on the properties of welded joints. Because of the foregoing, there are no grounds for any generalisations with reference to results of vibration welding, which is well illustrated by publication [18] describing tests involving the use of MAG method-based vibration welding performed on structural steel. During welding, the test elements were put into vibration using a dedicated station.…”

Section: Present Statementioning

confidence: 99%

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Welding in Vibration Conditions – Critical Approach

Sędek¹

2017

eBIS

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Vibratory stabilisation has been used in production practice for a relatively long time now. The use of vibratory stabilisation provides technical and economic advantages where high dimensional stability of welded structures is required. For many years, research magazines have been reporting of attempted welding in vibration conditions. The article provides the overview of reference publications concerned with this issue as well as presents related tests performed by the author. The publications cited in the article inform about the effect of vibration on the distribution of welding stresses, strength-related properties and on the manner of weld formation. However, varying views presented in the abovenamed publications do not unequivocally confirm the efficiency of welding on vibration conditions. The foregoing inspired the author to carry out research including welding tests involving ferritic steel S355 and performed in various conditions of vibration having specified frequency. The tests involved the determination of the distribution of welding stresses as well as included metallographic examinations, toughness tests and hardness measurements. The research revealed the lack of the effect of vibration on the distribution of welding stresses, hardness and toughness of welds. No changes in the microstructure of welds were observed either. The conclusions formulated on the basis of the research did not recommend, generally, the welding of ferritic steels in vibration conditions. Keywords: vibratory stabilisation, welding in vibration conditionsdoi: 10.17729/ebis.2017.3/1 Present StateThe vibration-based method used to increase dimensional stability has found applications in the making of welded machinery structures. The most favourable effect as regards dimensional stability is obtained when vibration is of resonant frequency. Vibration-induced stresses accelerate processes of microrelaxation and phase transformations at ambient temperature and, as a result, delayed strains. Vibration, as it were, "provokes" strains so that, after mechanical treatment, structures do not undergo unallowed deformations. When selecting structures to be subjected to vibratory stabilisation it should be noted that the vibration-triggered reduction of welding internal stresses is insignificant [1][2][3][4][5].

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Section: Present Statementioning

confidence: 86%

Section: Present Statementioning

confidence: 99%

Section: Present Statementioning

confidence: 99%

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Welding in Vibration Conditions – Critical Approach

Sędek¹

2017

eBIS

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“…With a suitable choice of vibratory treatment, welding stresses may be brought within desired design parameters. Munsi et al (1999) studied the effect of rigid body motion vibration on welding residual stresses. The specimens were welded during vibrations in a rigid body motion mode.…”

Section: Figmentioning

confidence: 99%

A review on techniques for improving the mechanical properties of fusion welded joints

Kalpana¹,

Rao²,

Rao³

2017

10.5267/j.esm

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This paper presents the effect of Post Weld Heat Treatment (PWHT), pulsed current welding, hybrid welding and vibratory assisted welding in the weld quality, residual stresses and mechanical properties of welded joints. At last, vibratory assisted welding has been suggested to enhance the mechanical properties of welded joints by overcoming the drawbacks in the above stated techniques. Past results showed that the welded test specimens under vibratory conditions exhibited improvements in mechanical properties than the arc welding without vibrations. Finally, some literature gaps are clearly identified and these gaps could help the future generation researchers to do work in the new direction.

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“…Three forms of vibratory motion have been investigated relating to the relieving of residual stresses, these being rigid body motion, flexural motion and torsional motion. The effect of rigid body motion and flexural vibration on welding residual stress has been investigated by Munsi et al [1,2].…”

Section: Introductionmentioning

confidence: 99%

Vibratory weld conditioning: Treatment of specimens during cooling

Munsi

Waddell

Walker

2000

Proceedings of the Institution of Mechanical Engineers, Part L:

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The aim of this study was to investigate the use of vibration to reduce the residual stress resulting from the welding process. Butt weld joints were subjected to vibration immediately after welding. While the specimens were cooling, vibration was applied to them over a specified range of temperatures. Three batches of specimens were processed in three temperature regions. The residual stresses were measured using an automated scanning X-ray diffractometer which provided detailed data over the area close to the weld and in the heat-affected zone. The residual stresses were found to be modified with an increase at some applied stress-temperature combinations and a decrease at others. With a suitable choice of vibratory treatment, welding stresses may be brought within desired design parameters.

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Vibratory weld conditioning — the effect of rigid body motion vibration during welding

Cited by 15 publications

References 2 publications

Welding in Vibration Conditions – Critical Approach

Welding in Vibration Conditions – Critical Approach

A review on techniques for improving the mechanical properties of fusion welded joints

Vibratory weld conditioning: Treatment of specimens during cooling

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