Mechanism clarification of mitigating welding induced buckling by transient thermal tensioning based on inherent strain theory

Yi, Bin; Wang, Jiangchao

doi:10.1016/j.jmapro.2021.06.044

Cited by 23 publications

(3 citation statements)

References 29 publications

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“…Comparative analysis of the results of our study with related studies [7][8][9][13][14][15] shows the similarity of the trend in providing a reduction effect of distortion and residual stress. This study provides additional references to the placement of flame torches in the TTT treatment welding process with a certain distance to optimize the application of TTT in thin plate welding.…”

Section: Discussion Of Transient Thermal Tensioning Treatment For Red...supporting

confidence: 73%

“…In the last decade, research about TTT on welding began intensively to resolve the problem of distortion and residual stress. This method is quite effective in reducing the level of distortion and residual stress, but the disadvantage of this method is that it requires a long preheating time before welding process, especially for welding large structures [14]. Long heating causes the efficiency of the welding process to become less efficient.…”

Section: Introductionmentioning

confidence: 99%

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Identifying the influence of transient thermal tensioning treatments on minimizing distortion and improving fatigue behavior of steel welded

Wibowo,

Surahmanto,

Ilman

2023

EEJET

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Due to the cost efficiency of welding repairs, the use of transient thermal tensioning (TTT) has begun to be applied to minimize distortion and residual stresses, particularly on thin plates. However, it requires a long preheating time especially on large structures, so that the efficiency of welding process cannot be maximized. Application of TTT treatment using flame heater on TTT treatment which require no preheating time so that welding efficiency can be increased. The aims of this study are to investigate the TTT treatment in reducing distortion, investigate the effect of TTT treatment on tensile strength and hardness, investigate the microstructure and its effect on tensile strength and hardness, investigated the effect of TTT treatment on fatigue crack growth rate. In this research, TTT treatment was performed by flame heating on the both side of weld line integrated in welding process. Temperature in both side plates were controlled and measured using thermocouple. The tests on the weld joints were carried out including distortion measurement, microstructure examination, hardness measurement, tensile test and fatigue test. Results showed that the TTT (60) treatment is the most effective in decreasing the longitudinal distortion which placing the flame heating a 60 mm behind welding torch. It tends to increase the tensile strength of weld metal supported by its increasing hardness. The increase in the percentage of the acicular ferrite phase is linearly related to the tensile strength and hardness of the weld joint. The fatigue behavior could be improved by TTT treatment (60) which is associated with the effect of decreasing residual stress in the weld metal region. This treatment is the best parameter in an effort to increase the welding efficiency of the TTT method

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Section: Discussion Of Transient Thermal Tensioning Treatment For Red...supporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Identifying the influence of transient thermal tensioning treatments on minimizing distortion and improving fatigue behavior of steel welded

Wibowo,

Surahmanto,

Ilman

2023

EEJET

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show abstract

“…To prevent welding buckling, some advanced techniques have been proposed and applied for fabricating lightweight structures with thin plates. In particular, owing to the confirmed design of a thin plate section with its strength validation and the high cost of advanced welding devices such as laser welding and friction stir welding, a local temperature control approach with transient thermal tension by an additional heat source and rapid cooling after welding arc by heat sinking are commonly investigated, and employed during shipbuilding owing to their practical and effective advantages [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Practice Design of Ship Thin Section Considering Prevention of Welding-Induced Buckling

Zhou,

Yi,

Wang

et al. 2023

Journal of Ship Production and Design

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_ The lightweight fabrication of thin-walled cabin sections is popular for advanced ships, and the dimensional tolerance generated by welding buckling significantly influences the fabrication accuracy and schedule with poststraightening. A typical thin section employed in the superstructure of a high-tech passenger ship is considered the research object. Conventional fabrication procedures and welding conditions were examined beforehand with combined thermal elastic-plastic and elastic FE computations based on the theory of welding inherent deformation, while welding buckling was represented with identical behavior compared with fabrication observation. Actually, there are usually two methods to prevent welding buckling with advanced fabrication. Stiffeners with optimized geometrical features and excellent elasticity moduli were assembled to enhance the rigidity of the ship thin section, and less welding inherent deformation with advanced welding methods can be employed to reduce mechanical loading. Computational results show that either less in-plane welding inherent strain or higher structural rigidity can reduce the magnitude of welding-induced buckling, and avoid the generation of welding-induced buckling during the lightweight fabrication. Introduction Recently, lightweight construction with thin-plate designs has become the highlight of advanced vehicles, such as ships, trains, and airplanes, particularly high-tech passenger vessels. Thin plate sections, as well as thin-walled structures with sufficient strength, exhibit excellent performance in enhancing the carrying capacity and protecting the environment with less fuel consumption. However, with the reduction in plate thickness for achieving lightweight design, welding-induced buckling can be generated owing to the lower stiffness as the most complex type of out-of-plane welding distortion (Wang et al. 2015, 2018). Buckling deformation will not only decrease fabrication accuracy and integrity but also increase cost and schedule; moreover, it influences mechanical performance, such as hydrodynamics. Unfortunately, it is hard to remove welding buckling after cooling to room temperature with flame heating or mechanical correction owing to its unstable features. Thus, it is preferable to reduce buckling distortion during the welding process by considering the practical design beforehand. Procedural parameters such as welding condition, heat efficiency, plate thickness, distribution of heat source, and stiffener spacing should be discussed because they influence the welding driving force and structural rigidity.

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Thermomechanical Analysis in Welding

Beygi

Marques

Silva

2022

SpringerBriefs in Applied Sciences and Technology

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Mechanism clarification of mitigating welding induced buckling by transient thermal tensioning based on inherent strain theory

Cited by 23 publications

References 29 publications

Identifying the influence of transient thermal tensioning treatments on minimizing distortion and improving fatigue behavior of steel welded

Identifying the influence of transient thermal tensioning treatments on minimizing distortion and improving fatigue behavior of steel welded

Practice Design of Ship Thin Section Considering Prevention of Welding-Induced Buckling

Thermomechanical Analysis in Welding

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