... 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...

... 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...

... 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...

... 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...

... of the most common forms of fabrication cracking in the welding of ferritic steels. HACC occurs when hydrogen becomes trapped inside the fusion zone or heat affected zone during rapid cooling, and, in the presence of sufficiently high welding residual stresses and a susceptible microstructure, causes cracks...

... on Underwater Wet SMAW Fillet Welded Non-load-carrying Attachments of Construction Steel Oliver Brätz a, Thomas Wolf b, Julia Osten a, Thomas Hassel b, Knuth-Michael Henkel a,c a Fraunhofer Institute for Large Structures in Production Engineering IGP Rostock, Mecklenburg-Western Pomerania, Germany b Leibniz...

... welded thick-walled nodular cast iron for wind energy application Christoph Bleicher, Steffen Schönborn, Heinz Kaufmann Fraunhofer Institute for Structural Durability and System Reliability LBF Darmstadt, Germany ABSTRACT Large cast components made of nodular cast iron for wind energy turbines and heavy...

...Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering Conference www.isope.org Rhodes, Greece, June 20 25, 2021 Copyright © 2021 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-82-1; ISSN 1098-6189 Improving Structural Weld Fatigue...

... 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...

... 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...

... A Study on Welding Distortion Mitigation by Gas Heating Using a Linearized Inherent Strain Method Hector Ruiz 1, Naoki Osawa 1, Sherif Rashed 2 1 Department of Naval Architecture & Ocean Engineering, Osaka University 2 Joining and Welding Research Institute, Osaka University Suita, Osaka, Japan...

... 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 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...

... crack from the electron beam welding (EBW) part. However, the LTG method doesn't need additional EBW to make a brittle. Recently brittle crack arrest (BCA) steels are used in upper deck or hatch side coaming of large container ships to prevent fatal brittle fracture accident. International Association...

... ABSTRACT Dramatic change of properties happens due to diffusion processes in metal during friction stir welding. The information on influence of friction stir welding thermo mechanical cycle on local mechanical properties of thermo hardenable Al-Mg-Si alloy joints is limited. Purpose...

... exposure in the production process of the clad pipes and in an eventual repair welding. In the welding simulation the local temperatures are logged and the resulting file is modified afterwards to include data, if available, from the diffusion bonding process. In the diffusion calculation temperatures...