Influence of girth welding material on thermal and residual stress fields in welded lined pipes

Obeid, Obeid; Leslie, A J; Olabi, Abdul Ghani

doi:10.1016/j.ijpvp.2022.104777

Cited by 11 publications

(3 citation statements)

References 32 publications

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“…2020, Dassault Systems Simulia Corp, Johnston, RI, USA) was used as the finite element analysis program for heat transfer analysis. Considering the previously reported high reliability of Fortran user subroutines [31][32][33][34][35], they were used to implement the moving heat source (Fortan Ver. 17.0, Intel, San Jose, CA, USA).…”

Section: Process For Deriving the Heat Sourcementioning

confidence: 99%

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An Improved Method for Deriving the Heat Source Model for FCAW of 9% Nickel Steel for Cryogenic Tanks

Kim,

Park

et al. 2023

Materials

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The International Maritime Organization (IMO) is tightening regulations on air pollutants. Consequently, more LNG-powered ships are being used to adhere to the sulfur oxide regulations. Among the tank materials for storing LNG, 9% nickel steel is widely used for cryogenic tanks and containers due to its high cryogenic impact toughness and high yield strength. Hence, numerous studies have sought to predict 9% nickel steel welding distortion. Previously, a methodology to derive the optimal parameters constituting the Goldak welding heat source for arc welding was developed. This was achieved by integrating heat transfer finite element analysis and optimization algorithms. However, this process is time-consuming, and the resulting shape of the weld differs by ~15% from its actual size. Therefore, this study proposes a simplified model to reduce the analysis time required for the arc welding process. Moreover, a new objective function and temperature constraints are presented to derive a more sophisticated heat source model for arc welding. As a result, the analysis time was reduced by ~70% compared to that previously reported, and the error rates of the weld geometry and HAZ size were within 10% and 15% of the actual weld, respectively. The findings of this study provide a strategy to rapidly predict welding distortion in the field, which can inform the revision of welding guidelines and overall welded structure designs.

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Section: Process For Deriving the Heat Sourcementioning

confidence: 99%

“…Considering the previously reported high reliability of Fortran user subroutines [31][32][33][34][35], they were used to implement the moving heat source (Fortan Ver. 17.0, Intel, San Jose, CA, USA).…”

Section: Process For Deriving the Heat Sourcementioning

confidence: 99%

An Improved Method for Deriving the Heat Source Model for FCAW of 9% Nickel Steel for Cryogenic Tanks

Kim,

Park

et al. 2023

Materials

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show abstract

“…To increase the reliability of the welded connection and to understand the welding process itself, it is necessary to use suitable experimental methods for the evaluation of the mechanical properties of the welding structure (weld, affected zone, etc.). Here, contact (e.g., strain measurements using strain gauges [6]) and non-contact methods (e.g., optical strain measurements using thermal imaging, laser triangulation inspection [7]) can be used for the observation and evaluation of the welding process [8]. In addition to these macro-level methods, micro-level methods, such as the hardness method or the scanning electron microscopy technique can be performed to evaluate the weld-basic material interface quality or to view changes in the material properties in the affected zone [9,10].…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of aluminothermic welds

Zeman,

Valach,

Zlámal

et al. 2023

APP

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The article presents a study of the mechanical processes occurring during the aluminothermic reaction using experimental methods (strain gauges, digital image correlation, thermography, scanning electron microscopy, profilometry). The aluminothermic reaction is a highly efficient welding method due to its exothermic behaviour, however, it places considerable demands not only on the welding technique, but also on the capabilities of the experimental methods used; these limitations are also discussed in the article. The aluminothermic reaction is associated with the formation of a localised heat source with a time evolution dictated by the technological procedure, which manifests itself in heat propagation to the surrounding weld material. The unequal evolution of the temperature field is the fundamental cause of the appearance of the heat affected zone or local deformations or surface curvature, which was the focus of the experimental methods deployed above and the results of which are shown in the article.

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Analysis of the ductility dip cracking in the nickel-base alloy welding overlay on heat exchanger tube sheet

Liu

Wang

Guan

2023

Engineering Failure Analysis

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Influence of girth welding material on thermal and residual stress fields in welded lined pipes

Cited by 11 publications

References 32 publications

An Improved Method for Deriving the Heat Source Model for FCAW of 9% Nickel Steel for Cryogenic Tanks

An Improved Method for Deriving the Heat Source Model for FCAW of 9% Nickel Steel for Cryogenic Tanks

Experimental evaluation of aluminothermic welds

Analysis of the ductility dip cracking in the nickel-base alloy welding overlay on heat exchanger tube sheet

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