Microstructural changes associated with vibratory prepared weldments

Tewari, S. P.; Shanker, Anand

doi:10.1007/bf00241699

Cited by 5 publications

(2 citation statements)

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“…[1][2][3][4][5][6][7] The effect of vibration on the mechanical properties of base material and weld is seldom examined. Tewari and Shanker [8][9][10] have studied the effect of longitudinal vibration at different frequencies on the mechanical properties of carbon steels. Hebel and Kreis 11 argued that improved mechanical properties can be achieved by subresonant vibration during welding as a result of the change in the weld to a fine grained microstructure.…”

Section: Introductionmentioning

confidence: 99%

Effect of vibration on weld metal hardness and toughness

Pučko¹,

Gliha²

2005

Science and Technology of Welding and Joining

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Vibration of welded parts is usually applied to achieve effects similar to thermal stress relief. With vibration, it is not only residual stresses that are affected. Using two different welding processes, the influence of vibration on hardness and toughness of the weld was measured. For each welding process, two series of Charpy specimens were made over the temperature range from 260 to z20uC. The only difference between the two series was in performing welding with or without vibration. Slight differences in weld metal hardness were observed. Toughness measurements show an increase in impact toughness and a significant increase in fracture toughness in samples which were vibrated during welding.

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Section: Introductionmentioning

confidence: 99%

Effect of vibration on weld metal hardness and toughness

Pučko¹,

Gliha²

2005

Science and Technology of Welding and Joining

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“…Several research studies have been conducted on the influence of vibratory weld conditioning on resid- ual stress reduction [24][25][26]. Limited investigations were carried out about the effect of vibratory weld conditioning on microstructure and the tensile properties [27][28][29][30]. Moreover, variations of the yield strength in terms of welded samples grain size, due to vibratory weld conditioning are reported in [31].…”

Section: Introductionmentioning

confidence: 99%

The influence of the applied mechanical vibration during welding on the residual stress and the fatigue crack growth rate of AA-5083 aluminum alloy

Tamasgavabari¹,

Ebrahimi²,

Ma³

2020

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Vibratory weld conditioning (VWC) was performed on the AA-5083 aluminum alloy specimens while they were welded with gas metal arc welding (GMAW). The variables in this study were vibration forces range from 400-3150 N and vibration frequency of 50-90 Hz. Microstructure, residual stress, and fatigue crack growth behavior of the welded samples were examined. Fracture analysis was also undertaken after the fatigue crack growth test using a scanning electron microscope (SEM). The results show that compared to the no-vibration welded sample, with increasing vibration forces, the columnar structure was replaced by equiaxed grains, and the area fraction of equiaxed grains increased to 75 %. In contrast to the sample welded without vibration, residual stress decreased while vibration was applied during welding. On the other hand, the application of mechanical vibration during welding, at each given frequency of 50, 75, and 90 Hz caused residual stress decrement of about 36, 38, and 44 %. At low ΔK values, the crack growth rate is low in all welded specimens and is approximately similar to the crack growth rate of the no-vibration welded specimen. Tensile residual stress is an effective reason that caused the crack growth rate of the material to increase. K e y w o r d s : vibratory weld conditioning (VWC), equiaxed grain, residual stress, 5083 aluminum alloy, fatigue crack growth

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