... ABSTRACT For the purpose of acquiring mechanical data to determine the time of installation work for shaft and rudder system in shipbuilding process, a technique was developed to evaluate welding deformation of large metal structures using finite element analysis. Additionally, the distance...

... and Quantification of Discoloration in the Weld Root Bead and Heat-Affected Zone of Stainless Steel Pipe Weldments Beomcheol Kim, Changmin Lee, Jinho Kim and Jaehee Lee CAE Research Department, HD Korea Shipbuilding & Offshore Engineering Seongnam-si, Gyeonggi-do, Korea ABSTRACT This study focuses on the challenges...

... ABSTRACT Understanding the key differences between the High Performance Gas Metal Arc Welding – HP GMAW – variants and the conventional process variants and their conceiving and development scenario is paramount for their further evolution and customization for distinct heavy thickness joint...

... ABSTRACT This paper presents an approach to simulate the in-service welding of type-B sleeves using finite element analysis (FEA) and induction preheating. To validate the models, numerical results of thermal cycles and temperature distribution are compared with experimental data. The maximum...

... ABSTRACT Welding technologies, especially the GMAW process, are well known and in great demand in the offshore oil and gas industry, especially for high thickness applications. As a result, technologies designated as high-performance GMAW variants have naturally emerged to meet certain...

... welded joints, were evaluated. The stress analysis of a trial-designed International Maritime Organization (IMO) Type C tank was performed using the finite element method, and a fracture safety assessment was conducted assuming the presence of weld defects. It was concluded that there was no risk...

... ABSTRACT Liquefied CO2 storage tanks have been studied from the aspect to define fracture toughness required to prevent a failure from structural details subjected to welding residual stress. An analytical approach was performed to evaluate the effect of MSR on relieving residual stress, where...

... technology is not mature enough, especially the titanium alloy welding technology. The high concentration argon welding workshop designed in this paper is mainly aimed at the overall welding of the typical titanium alloy large ring ribbed column shell, and the key technology is verified by the principle...

... ABSTRACT Buckling distortion is prone to be produced in fillet welding for lightweight construction, and transient thermal tensioning (TTT) as an in-process method can improve construction accuracy with lower cost of the stiffened plate structures. The fillet welding experiment under...

... welding hacc proceedings transformation test piece microstructure bead hardness hydrogen hydrogen concentration high strength steel inspection plastic strain steel fusion zone simulation prediction diffusion ABSTRACT Hydrogen-assisted cold cracking (HACC) is one...

... specimen evaluation wet welding fatigue testing fatigue strength artificial intelligence welding weld weld quality test data steel probability different water depth background document water depth imperfection category detail category smaw fillet welded non-load-carrying...

... it comes to wind energy components with masses up to several tens tons. Thus, even components with small surface or near-surface defects need to be brought into usage. One measure is to determine the defect characteristics and remove the defect by a defined manufacturing and a subsequent welding process...

... stiffener integration welding project team support structure tolerance flange design change installation moon pool center hole module stopper Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference Shanghai, China, June 5 10, 2022 Copyright © 2022...

... Abstract The fatigue life of welded structures is typically limited by the fatigue resistance of individual weld joints. Numerous weld fatigue improvement methods have been adopted by fabricators to give extended life to fatigue sensitive structures. These improvement methods are often applied...

... Abstract In order to ease processing Vallourec developed a new low carbon alloying concept for seamless pipes which reduces the sensitiveness of hardness cracks and increase the procedure-related welding security. This leads on the one hand to a wider range of welding parameters...

... the diffusible hydrogen content by 21%. INTRODUCTION Welding metallurgy is the most important area of research for improving the microstructure of welds in underwater welding. Promising methods in welding metallurgy are optimal alloying, deoxidization and refining, reduction of non-metallic slag inclusions...

... stress was obtained. δ-ferrite was observed with increasing Cr eq /Ni eq ratio. The Experimental results show that volume expansion and toughness were reduced by residue of δ-ferrite. INTRODUCTION Due to the rapid thermal cycles and restriction of surrounding base metal during welding...

... ABSTRACT A number of versions of the MIG/MAG process has appeared in the market to cope with the welding of joints formed by high thickness sheets without the need for beveling. This originated in the 1980s under the designation of Transferred Ionized Molten Energy (TIME), whereas the 1990s...

... ABSTRACT In this study, the proposed linearized inherent strain method for predicting straightening of welded structures is investigated. Thermal elastic-plastic analysis is used to compute inherent strain of a thin flat plate caused by line heating. An accurate gas heat source model...

... ABSTRACT Cylindrical leg is an essential structure of jack-up rig, and its fabrication accuracy will influence the operation cost and service lift of offshore structure. Concentrating on the dimensional deformation caused by rack and cylinder welding, the experiment to fabricate the leg...