Effect of ultrasonic vibration on microstructural evolution and mechanical properties of underwater wet welding joint

Wang, Jianfeng; Sun, Qingjie; Wu, Laijun; Liu, Yibo; Teng, Junbo; Feng, Jicai

doi:10.1016/j.jmatprotec.2017.03.019

Cited by 52 publications

(13 citation statements)

References 33 publications

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“…To obtain high carbon equivalent steel welded joints with good quality it is essential to improve consumables and technologies and develop new ones [24]. There are some studies for using induction heating [25], mechanical constraint support [26] and ultrasonic assistance [27] for improve weldability of underwater joints. One of the conventional method to decrease susceptibility to cold cracking is heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Temper Bead Welding of S460N Steel in Wet Welding Conditions

Tomków

Fydrych

Łabanowski

2018

Advances in Materials Science

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Wet welding is the most common method of welding in water environment. It is most often used for repairing of underwater parts of offshore structures. However, the water as a welding environment causes an increase of susceptibility of steels to cold cracking. For underwater constructions high strength low alloy (HSLA) steel are widely used. In wet welding condition a HSLA steel is characterized by high susceptibility to cold cracking. Temper Bead Welding (TBW) was chosen as a method to improve the weldability of S460N steel. The studies showed that TBW technique causes significant decrease of maximum hardness of heat affected zone (HAZ). The largest decrease in hardness occurred in specimens with the pitches in range 66-100%.

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Section: Introductionmentioning

confidence: 99%

Temper Bead Welding of S460N Steel in Wet Welding Conditions

Tomków

Fydrych

Łabanowski

2018

Advances in Materials Science

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“…The comparative study of the microstructures shows that welding under vibratory conditions (150 and 300 Hz) has fine grain structures as compared to the conventional condition. The imposed vibration during welding process produces following affects [25][26][27]39,45,46]: breaks the growing dendrites, increases the cooling rate, prevents the newborn nucleus from re-melting, increases the number of grains and produces the fine grain structure.…”

Section: Microstructure Characterizationmentioning

confidence: 99%

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

Singh

2019

Manufacturing Rev.

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This study presents a new concept of a vibratory welding setup which can transfer the mechanical vibrations in the weld zone during Shielded Metal Arc welding (SMAW) process and can also produce the resonance frequency of 300 Hz. In the present investigation mild steel plates of 6 mm thickness has been butt welded using both conventional and vibratory welding conditions. Microstructure and the mechanical properties of the butt welded joints were evaluated, and the results were compared. Further, in order to optimize the process parameters of vibratory welding technique Taguchi and analysis of variance (ANOVA) technique have been adopted. The responses considered for analysis are hardness, ultimate tensile strength (UTS) and impact strength. The result of the study indicates that by applying the vibratory treatment during welding process the mechanical properties such as hardness, tensile strength and impact strength have been enhanced. Lastly, the obtained results are correlated from the results in the past researches.

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“…There are many post-weld methods mature in decreasing the welding residual stress, such as post-weld heat treatment [6], shot peening [7], post-weld rolling methods [8], water jet peening [9], etc. Some methods that are used before and during welding can also play an important role in decreasing welding residual stress, such as using proper groove distances [10], welding with low transformation temperature consumables [11], a preheating process [2], ultrasonic vibration [12][13][14], etc. However, compared with the above treatments, ultrasonic impact treatment (UIT) has superiority in reducing residual stresses and improving fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment

et al. 2020

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In this study, the effects of ultrasonic impact treatment (UIT) on the residual stress in a repair welding joint are investigated by experimental and finite element methods. A three-dimensional numerical analysis approach including a thermomechanical-coupled welding simulation and dynamic elastic-plastic UIT simulation is developed, which has been validated by X-ray diffraction measurement and indentation strain method. The results show that longitudinal residual stresses basically turned into the small tensile stress state from the large tensile stress state, and transverse residual stresses have mainly turned into compressive stresses from large tensile stress after the UIT. In the thickness direction, the average decrease of longitudinal residual stress is 259.9 MPa, which is larger than the 149.1 MPa of transverse residual stress. The calculated residual stress distribution after the UIT of the thin plate is compared with that of the thick plate in the literature, with the results showing the stress accumulation layer inside the thick plate. The simulation results show that the elastic strains are decreased slightly and the equivalent plastic strain is increased markedly after UIT, which explains the mechanism of residual stress relaxation.

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Effect of ultrasonic vibration on microstructural evolution and mechanical properties of underwater wet welding joint

Cited by 52 publications

References 33 publications

Temper Bead Welding of S460N Steel in Wet Welding Conditions

Temper Bead Welding of S460N Steel in Wet Welding Conditions

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

Experimental and Numerical Simulation to Study the Reduction of Welding Residual Stress by Ultrasonic Impact Treatment

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