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Relevant bibliographies by topics / Welded Zone

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Academic literature on the topic 'Welded Zone'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Welded Zone"

1

Koley, Ishita, and Sukumar Kundu. "Electrochemical behavior of friction stir welded joint of ultra-low carbon steel." IOP Conference Series: Materials Science and Engineering 1248, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1757-899x/1248/1/012040.

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Abstract In this study, friction stir welding of ultra low carbon steel was performed at tool rotational speeds in the range from 300 to 750rpm with 150rpm increments at 60mm/min fixed traverse speed. Throughout study was performed on macro and micro structures in order to determine the several welded zones for example stir zone, thermo-mechanically affected zone, and heat-affected zone. Microhardness profiles were performed along the welded joint's cross section and the utmost hardness was obtained at stir or nugget zone as compared to the other zones of the welded joints. The hardness values

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Yoon, K. H., S. I. Kwun, and Yun Mo Yeon. "Comparison of Fatigue Behavior of FS (Friction Stir) and TIG Welded Al 6N01 Alloy." Key Engineering Materials 417-418 (October 2009): 593–96. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.593.

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The fatigue properties of friction stir (FS) and TIG welded Al 6N01-T5 alloys were compared in the present study. The low cycle fatigue (LCF) test was performed under total strain amplitudes in the range of ± 0.6 ~ ± 1.5% and with a strain rate of 3 x 10-3/s. During low cycle fatigue, the base metal showed little cyclic hardening or softening, whereas both the FS and TIG welded zones showed a large amount of cyclic hardening until fracture, although the fatigue life of the TIG welded zone was much shorter than that of the FS welded zone. The fatigue crack growth rate (FCGR) was retarded in the

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Allameh, S. M., C. Mercer, D. Popoola, and W. O. Soboyejo. "Microstructural Characterization of Ultrasonically Welded Aluminum." Journal of Engineering Materials and Technology 127, no. 1 (2005): 65–74. http://dx.doi.org/10.1115/1.1836792.

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The microstructure and mechanical properties of ultrasonically welded AA6111-T4 specimens are discussed. The effects of welding time on the mechanical properties of welded joints are investigated. A longer welding time results in a more continuous welded interface and higher yield and fracture strengths. Accordingly, fatigue properties of the welded specimens with longer welding times are improved. The results of electron microscopy on the cross section of ultrasonically welded joints show three distinct zones: weld zone, weld affected zone and compression zone each with a distinct microstruct

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Abramov, A. D., A. S. Ilinykh, M. S. Galay, and Je S. Sidorov. "Investigation of Thermal Conditions of the Aluminothermic Welding and their Influence on the Structure and Properties of Metal Rails." Materials Science Forum 906 (September 2017): 50–55. http://dx.doi.org/10.4028/www.scientific.net/msf.906.50.

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Rail welded joints are integral part of continuous welded rail. However, they often do not have sufficient reliability during the operation. The article is devoted to the assessment of temperature influence effect on the mechanical properties and structure of weld metal and welded rails. The temperature distribution across the rail section in welded zone during the cooling process of aluminothermic rail welding is obtained using simulation by LVMFlow. The results of the study of hardness and structure of metal rail aluminotermitic welded joints are given. It is shown that the hardness of rail

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Mahdi, Elsadig, E. Eltai, Fatima Ghassan Alabtah, and Faysal Fayez Eliyan. "Mechanical Characterization of AA 6061-T6 MIG Welded Aluminum Alloys Using a Robotic Arm." Key Engineering Materials 913 (March 18, 2022): 271–78. http://dx.doi.org/10.4028/p-rhrr3n.

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Aluminum alloys are of particular interest in the design of lightweight structures in different applications. Accordingly, welding aluminum alloys (AA) is a critical issue; for example, welding defects could arise during the traditional welding of aluminum alloys. This paper investigates the effects of welding using a robotic arm on the mechanical properties of 6061-T6 Aluminum alloy, as plates joined by Metal Inert Gas (MIG) welding. The tensile behavior and mechanical properties were investigated using tensile testing, hardness testing, and impact testing. The tensile behavior of AA-6061-T6

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Chen, Yu Hua, Li Ming Ke, Ying Liu, and Shi Long Xu. "Study on the Microstructure of Micro Laser Welded Joint of TiNi Shape Memory Alloy Sheet." Advanced Materials Research 97-101 (March 2010): 3936–39. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3936.

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Butt welding of 0.2mm thick TiNi shape memory alloy sheet was successfully realized by using micro impulse laser whose average power is 80W and the microstructure of welded joint was study in this paper. The results show that, the welded joint of micro laser welding can be divided into four zones according to grain size and microstructure. The microstructure in base metal zone is rolled structure and the grains are coarse and heterogeneous. The microstructures of welded seam center zone are fine equiaxed crystals and the microstructures of both lower surface and upper surface edge zone are col

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Praunseis, Zdravko, Marko Mlakar, and Sonja Novak. "DETERMINATION OF LOCAL BRITTLE ZONES AT THE CRACK FRONT IN THE HAZ OF WELDED JOINT." Journal of Energy Technology 8, no. 4 (2024): 11–22. https://doi.org/10.18690/jet.8.4.11-22.2015.

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Welded joints are the weakest link in the construction of steel structures. The brittlest part of a multi-pass welded joint is the heat-affected zone, where brittle fractures of the structure often appear. In this article, examination of the whole heat-affected zone of high strength multipass X welded joints was performed. All microstructures and the local brittle zones’ sizes at the crack tip front were precisely determined

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Ma, Yu E., and Zhen Qiang Zhao. "Investigation on the Corrosion Effect of Friction Stir Welded AA2024 T3 Aluminum Alloy Joints." Key Engineering Materials 525-526 (November 2012): 129–32. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.129.

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Before friction stir welded integral panels are used in main aircraft structure, the corrosion behavior of welded joint need to be studied in detail. 2024 T3 samples were designed and welded by friction stir welding; the microstructure crossing the weld zone was observed by scanning electron microscopy (SEM), the feature of different zones (base material, thermo-mechanical affected zone, nugget) was seen; the corrosion testing in NaCl smoking box was carried out, and microstructure was observed after corrosion, localized corrosion predominantly occurs in the thermo-mechanical affected zone.

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Shchapov, G. V., and N. V. Kazantseva. "Comparative analysis of the chemical composition and mechanical properties of duralumin welded joint produced by friction stir welding." Frontier materials & technologies, no. 2 (2024): 113–19. http://dx.doi.org/10.18323/2782-4039-2024-2-68-10.

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Friction stir welding is an advanced method of joining various metals and alloys in the aircraft and mechanical engineering industries. This type of welding is used to join materials that are difficult to weld or not weldable by conventional methods. The high-strength D16 aluminum alloy is difficult to weld by fusion, which is associated with the formation of a dendritic structure in the fusion zone leading to a decrease in the mechanical strength of the joint. In the work, the microstructure and microhardness of a welded seam of the D16 aluminum alloy produced by friction stir welding was stu

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Djili, Abderrahmane, Boudjema Bezzazi, Mohamed Habouss, and Nadjet Zioui. "Assessment of friction stir welding joints of AA2017-T4 aluminum by disc pressure mechanical tests." Journal of Applied Engineering Science 21, no. 2 (2023): 577–86. http://dx.doi.org/10.5937/jaes0-41037.

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Precipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional FSW tool. A macrograph of the cross section of the butt-welded joint shows the classical zones for such welding, namely the nugget zone, the thermo-mechanically affected zone and the heat affected zone. Scanning Electron Microscopy displays a grain refining and a re-formation of the precipitates in the nugget zone. Micro-hardness measurements on the cross-section perpendicular to the welding direction give the standard W-profile of the hardness for such welding, with as expected, the relatively highest

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Dissertations / Theses on the topic "Welded Zone"

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Meyer, Arnold Matthys. "Intersitial diffusion from the weld metal into the high temperature heat affected zone in 11-12% chromium steel welded joints." Pretoria : [s.n.], 2000. http://upetd.up.ac.za/thesis/available/etd-09292008-100709/.

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Lundberg, Axel. "Temperature profiles and hardness estimation of laser welded heat affected zone in low carbon steel." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20830.

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Termisk modellring av hårdhet genom beräkning och simulering av den värmepåverkade zonen i en lasersvetsad stålplatta är en omfattande process. Dock är analysen viktig då mikrostrukturella fastransformationer förorsakade av svetsningen kan ge oönskade hårdhetsnivåer av den värmepåverkade zonen jämfört med hårdeheten i basmaterialet. I denna avhandling har analytiska ekvationer implementerats och testats för validitet mot simuleringar gjorda av andra författare och mot experimentella värden.Eftersom termisk modellering av svetsar är ett omfattande område var avhandlingen tvungen att smalnas av

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Cadieux, Gérard. "Influence of heat treatment on heat affected zone microfissuring in EB welded Microcast-X Inconel 718." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/MQ32068.pdf.

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Dang, Weidong. "Finite element modelling of hybrid (spot welded/bonded) joints under service conditions." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2187/document.

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Le soudage par point et le collage sont largement utilisés dans la jonction des tôles, telles que l'assemblage de caisses de voiture. Récemment, le soudage par point et le collage ont été combinés pour faire le joint hybride soudé-collé, qui est utilisé pour joindre les aciers à hautes résistances et améliorer la rigidité et la résistance aux chocs des corps de voiture. Dans l'industrie, l'évaluation de la conception avant prototype nécessite des modèles fiables de comportement en termes de prédiction des comportements mécaniques. Le modèle élément finis de joint soudé-collé est un nouveau déf

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Tribe, Allan M. "Study on the Fracture Toughness of Friction Stir Welded API X80." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3740.

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High strength low alloy (HSLA) steels have been developed to simultaneously have high yield strength and high fracture toughness. However, in practical applications steel must be welded. Traditional arc welding has proven detrimental to the fracture toughness of HSLA steels. Friction stir welding has recently shown mixed results in welding HSLA steels. The range of welding parameters used in these recent studies however has been very limited. With only a few welding parameters tested, the effect of spindle speed, travel speed, and heat input on the fracture toughness of friction stir welded HS

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Nuruddin, Ibrahim K. "Effect of welding thermal cycles on the heat affected zone microstructure and toughness of multi-pass welded pipeline steels." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7755.

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This research is aimed at understanding the effect of thermal cycles on the metallurgical and microstructural characteristics of the heat affected zone of a multi-pass pipeline weld. Continuous Cooling Transformation (CCT) diagrams of the pipeline steel grades studied (X65, X70 and X100) were generated using a thermo mechanical simulator (Gleeble 3500) and 10 mm diameter by 100 mm length samples. The volume change during phase transformation was studied by a dilatometer, this is to understand the thermodynamics and kinetics of phase formation when subjected to such varying cooling rates. Sampl

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Clark, Tad Dee. "An Analysis of Microstructure and Corrosion Resistance in Underwater Friction Stir Welded 304L Stainless Steel." Diss., BYU ScholarsArchive, 2005. http://contentdm.lib.byu.edu/ETD/image/etd872.pdf.

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Postal, Germano Tagliari. "Projeto e fabricação de microtribômetro para análise de juntas soldadas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179571.

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Este trabalho apresenta o desenvolvimento de um microtribômetro linear, do tipo esfera sobre chapa, capaz de analisar o comportamento tribológico de materiais em linhas até 5 mm de comprimento, frequências de até 2 Hz e cargas até 10 N, com ou sem meio úmido, características que o tornam uma ótima ferramenta para observar o comportamento tribológico, ou a resistência ao desgaste de diferentes zonas de uma junta soldada. Durante o projeto do microtribômetro, houve a preocupação de desenvolver um equipamento seguro, fácil de operar e robusto, visando a utilização do mesmo por alunos de graduação

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Chan, Toong Khuan. "Stress concentrations in weld heat affected zones in aluminium-zinc-magnesium alloy." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259442.

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Stevens, Peter Alastair. "Shear zone properties of inertia friction welds." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5770/.

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Inertia weld process variables arc characterised using empirical relations that arc functions of the weld input parameters, allowing the variables to be predicted for any future production welds. The techniques for establishing the empirical relations can be applied to future alloy system for inertia welding by using significantly refined test matrices, reducing the development costs of new welds. Power loss in the bearings for two inertia welding machines is characterised by using hydrostatic bearing theory and several experimental techniques. This allows energy-based empirical relations for

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Books on the topic "Welded Zone"

1

George, M. J. Measurement of toughness in the heat-affected zone of welded structural steels. Commission of the European Communities Directorate-General Information Market and Innovation, 1985.

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Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments. AMPP, 2020. https://doi.org/10.5006/nace_sp0472-2020.

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Scope This standard establishes guidelines to prevent most forms of environmental cracking of weldments in carbon steel refinery equipment, including pressure vessels, heat exchangers, piping, valve bodies, and pump and compressor cases. Weldments are defined to include the weld deposit, base metal HAZ, and adjacent base metal zones subject to residual stresses from welding. It defines standard practices for producing weldments in P-No. 1 steels resistant to environmental cracking in corrosive petroleum refining environments. This standard was maintained by Task Group 326.

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Firebrace, William. Memo for Nemo. The MIT Press, 2022. http://dx.doi.org/10.7551/mitpress/14433.001.0001.

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A cultural history of living in the undersea, both fictional and real, from Jules Verne's Captain Nemo to NASA's ECC02 project. In Memo for Nemo, William Firebrace investigates human inhabitation of the undersea, both fictional and real. Beginning with Jules Verne's Captain Nemo—an undersea Renaissance man with a library of 12,000 volumes on his submarine—and proceeding through aquariums, undersea photography, artificial seas on land, nuclear-powered submarines, undersea film epics, giant squid, and NASA satellites, Firebrace examines the undersea as a zone created by exploration and invention

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Book chapters on the topic "Welded Zone"

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He, Qi, Zeran Hou, Jie Kong, Lulu Deng, Xiaolong Ma, and Junying Min. "Effect of Welding Processes on Microstructure and Mechanical Properties of Laser-Welded Al-Si-Coated 22MnB5 Steel." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58006-2_20.

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AbstractTailor welded blank (TWB) has been developed in the automotive industry to improve structural safety and material efficiency. Al-Si-coated 22MnB5 steel is the main material for laser tailor welding due to its resistance to oxidation and decarburization during hot stamping, which can otherwise deteriorate the performance of welded joints. This study investigates the use of partial ablation welding (PAW) and filler wire welding (FWW) as compared to traditional self-fusion welded (SFW) to enhance the mechanical performances of Al-Si-coated 22MnB5 steel welded joints. The effects of weldin

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Tu, Haoyun. "The Cohesive Zone Model." In Numerical Simulation and Experimental Investigation of the Fracture Behaviour of an Electron Beam Welded Steel Joint. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67277-9_6.

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Dzyubyk, Andrij, Lidiya Lisovska, Andriy Voitovich, Ivan Khomych, Oleh Soloviov, and Liudmyla Dzyubyk. "Investigation in Structure of Fusion Zone of Welded Joint of High-Strength Steel with Austenite Weld." In New Technologies, Development and Application VII. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-66268-3_34.

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Odanovic, Z., and L. J. Nedeljkovic. "Numerical Modelling of Microstructure in Heat Affected Zone of Gma Welded HY–100 Steel." In Mathematical Modelling of Weld Phenomena: No. 5. CRC Press, 2025. https://doi.org/10.1201/9781003580065-21.

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Lequesne, Cedric, A. Plumier, H. Degee, and Anne Marie Habraken. "Numerical Study of the Fatigue Crack in Welded Beam-To-Column Connection Using Cohesive Zone Model." In Fracture and Damage Mechanics V. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-413-8.847.

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Louzguine-Luzgin, D. V., G. Xie, T. Tsumura, et al. "The Structure of the Welded Zone and Phase Transformation Behavior of Ni-Based Bulk-Glass Forming Alloy." In Ceramic Transactions Series. John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118144145.ch1.

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Lee, Won Bae, Chang Yong Lee, Yun Mo Yeon, Jong Bong Lee, Shur Chang Chae, and Seung Boo Jung. "Grain Growth Behavior and Mechanical Properties of the Friction Stir Welded Zone of 7055 Al Alloy Followed by Post Weld Heat Treatment." In THERMEC 2006. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.4087.

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Manjula, Ch, D. Rama Seshu, and T. D. Gunneswara Rao. "A Numerical Study on the Shear Strength of RC Beams Provided with Welded Wire Mesh as Core Zone Reinforcement." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2552-0_39.

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Hamatani, Hideki, Yasunobu Miyazaki, Tadayuki Otani, and Shigeru Ohkita. "Minimization of Heat-Affected Zone Size in Welded Ultra-Fine Grained Steel under Cooling by Liquid Nitrogen during Laser Welding." In THERMEC 2006. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.4063.

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Sano, Tomoko, Jian Yu, Richard Chen, and Chian-Fong Yen. "The Effect of the Variation of Microstructure in the Friction Stir Welded Zone on the Strain and Tensile Properties of Al2139." In ICAA13: 13th International Conference on Aluminum Alloys. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495292.ch95.

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Conference papers on the topic "Welded Zone"

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Simpson, Theresa C., Jay D. Hoffman, Laura Soreide, and David H. Meyer. "Corrosion Performance of Tailor Welded Blanks." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98745.

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Abstract The purpose of this study was to evaluate the corrosion performance of tailor welded blanks as a function of the type of weld. Cosmetic and perforation corrosion resistance of coated sheet products containing mash-seam and laser welds were evaluated using the GM9540P-Method B and SAE J2334 laboratory corrosion tests. Materials were tested in a variety of formed conditions and as flat panels to enable comparison of the effects of forming on the painted corrosion performance. Primary conclusions from the study are as follows: The weld zone is much wider in mash-seam welded blanks than i

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Morach, R., and M. Büchler. "Analysis of Welded Stainless Steels and Nickel Base Alloys Using a Locally Resolving Electrochemical Sensor." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04232.

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Abstract The patented electrochemical cell built into a pen permits the non-destructive examination of individual surface areas. The small tip of the pen of approx. 1.5mm2 allows positioning the sensor on any surface geometry and thus achieving locally resolved measurements. So far, the examination of welded pieces was restricted to special fabricated specimens or the analysis of the complete weld and the adjacent surface. The pen-type cell was used to examine welded plates made from standard stainless steel grades. The examination of the weld metal, the heat affected zone and the base materia

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McCaul, Colin. "The Effect of Welding on Corrosion Resistance of an AOD Refined Austenitic Stainless Casting." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92297.

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Abstract Existing specifications for high alloy austenitic stainless steel castings often require a solution anneal after weld repair to eliminate carbide precipitation in the heat affected zone and thereby prevent intergranular corrosion. The introduction of the argon-oxygen- decarburization (AOD) secondary refining process in many stainless foundries facilitates the production of CN7M and similar alloys with very low carbon levels. Cast test plates in the CN7MS composition having carbon limited to ≤ 0.03% were welded using both GTAW and SMAW processes. Samples were taken, in the as-welded co

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Amaya, Hisashi, Kunio Kondo, Akira Taniyama, et al. "Stress Corrosion Cracking Sensitivity of Super Martensitic Stainless Steels in High Chloride Concentration Environment." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04124.

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Abstract It has been reported that the super martensitic stainless steel welded joints may be susceptible to stress corrosion cracking (SCC) in CO2 environment at elevated temperatures. In this investigation, the effect of the welding conditions on SCC sensitivity of super martensitic stainless steel was investigated with the welded joints by Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW). The GMAW as welded sample suffered SCC in the heat affected zone (HAZ), however, no SCC was observed in the GMAW with the post weld heat treatment (PWHT) sample, GTAW as welded sample and G

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Scheiber, Veronica, Pauline Huguenin, Jérôme Bridel, Florent Krajcarz, Veronica Scheiber, and Vincent Vignal. "Pitting Corrosion Resistance of UNS S32202 Welds: Bulk Microstructure vs Surface Behavior." In CONFERENCE 2022. AMPP, 2022. https://doi.org/10.5006/c2022-17913.

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Abstract Duplex stainless steel (DSS) provides a good alternative to austenitic stainless steel to build engineering designs thanks to excellent mechanical properties and corrosion resistance associated to their biphasic microstructure. Their microstructure changes during the welding. The influence of microstructure and elemental distribution on pitting corrosion resistance of different zones of the lean DSS UNS S32202 welded by Gas Tungsten Arc Welding (GTAW) was analyzed. The welded transversal cross section surface after polishing and the welded surface after pickling were studied. Comparin

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Weng, Shuo, Yuhui Huang, and Fuzhen Xuan. "Effect of Low-cycle Fatigue Behavior on Corrosion of Welded Joint in Simulated Environment of Low Pressure Nuclear Steam Turbine." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11124.

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Abstract The effect of microstructure evolution induced by low-cycle fatigue behavior on the corrosion of welded joint in the simulated environment of low pressure nuclear steam turbine was comprehensively investigated. The microstructure evolution was observed through optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). Corrosion susceptibility of welded joint was examined by traditional electrochemical measurement and scanning vibrating electrode technique (SVET) measurement. The traditional electrochemical results showed that weld metal was

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Yang, Liying, Wei Liu, and Minxu Lu. "Galvanic Corrosion Behavior of the Welded Joint of Ni-Based Alloy and X60 Steel in CO2 Saturated Solution." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08178.

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Abstract Ni-based alloy C4 (N06455) and pipeline steel X60 were welded by TIG welding method with Ni-based alloy welding-wire ENiCrMo-3, Corrosion experiments of the welded joint were carried out by a high temperature and pressure autoclave in a CO2 saturated solution. The cross-section corrosion morphologies of the welded joint were observed by Scanning Electron Microscopy (SEM). The cyclic volt-ampere method (CV), the galvanic couple current, polarization curves and electrochemical impedance spectroscopy (EIS) of the X60 steel/weld metal couple and X60 steel matrix were measured, respectivel

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Christensen, Curt, R. T. Hill, F. O. Koch, and W. Haumann. "The Effect of Post Weld Inductive Thermal Treatment on SSC Resistance of Saw Line Pipe Steel." In CORROSION 1988. NACE International, 1988. https://doi.org/10.5006/c1988-88055.

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Abstract A comprehensive study, utilizing pipe ring ovalization testing, full scale pressure tests and fracture mechanics evaluation has been performed in order to quantify the influence of residual stress on the sulphide stress cracking behaviour of double submerged arc welded large diameter gas pipeline material. A procedure to control the weld zone residual stresses is described as are the results from testing pipe material in both the as-welded and post weld thermal treated condition at various levels of residual stresses. Preliminary indications obtained from fracture mechanics evaluation

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Lee, Seung Wook, Han-sang Lee, and Ji Han. "Creep Property of Long-term Service Exposed T23-347H Dissimilar Welded Joint." In AM-EPRI 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0561.

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Abstract This study conducted creep tests, microstructural, and hardness analyses on SA213T23-TP347H dissimilar weld joints of long-term serviced coal-fired boiler final superheater tube. The welded joint (SA213 T23-TP347H) of the superheater tube, after approximately 105,000 hours of service, was sampled for creep life assessment and maintenance planning. Creep tests were conducted at 600°C under three stress conditions: 100, 140, and 160MPa. Most cracks were observed in the heat-affected zone of T23, and compared to unused tubes, the creep life consumption rate was approximately 90%. All dis

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Fang, B., E.-H. Han, J. Wang, et al. "The Influence of Weld Heat-Affected Zone on Stress Corrosion Cracking of Pipeline Steel in Near-Neutral PH Environment." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08500.

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Abstract Colonies of stress corrosion cracks are often seen around weld heat-affected zones (HAZs) in pipelines that are operating in the field in contact with near-neutral pH (NNPH) environment. Research on stress corrosion cracking (SCC) of welded line pipe steel can contribute knowledge that is important in establishing pipeline integrity. In the project reported in this paper, samples that had been machined from a large-diameter welded gas transmission pipe were subjected to slow strain rate testing (SSRT) at different strain rates in a soil solution and in NS4 solution, both purged with 5

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Reports on the topic "Welded Zone"

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Maxey. L51427 ERW Weld Zone Characteristics. Pipeline Research Council International, Inc. (PRCI), 1992. http://dx.doi.org/10.55274/r0011187.

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The objective of this research project was to determine the fatigue characteristics of the weld zone of electric resistance welded (ERW) pipe. The project involved: (1) characterizing pipe samples in terms of initial defects, tensile and yield strength, chemistry, and fracture toughness, (2) evaluating the fatigue crack growth of base metal and the weld zone in air and a 3.5 wt% NaCl solution, and (3) evaluating the fatigue crack growth of machined defects in the weld zone of ERW pipe subjected to cyclic pressure loading. This study found that the weld zone and base metal exhibit the same fati

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Author, Unknown. PR-185-9331-R01 Stress Relief of Piping Welds in Compressor Stations - 1994. Pipeline Research Council International, Inc. (PRCI), 1994. http://dx.doi.org/10.55274/r0011448.

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Post-weld heat treatment (PWHT) of welded joints is carried out for the following three reasons: (1) Improve the fracture toughness of the welded joint (2) Reduce welding residual stresses (3) Reduce heat-affected zone (HAZ) hardness. The objective of this work is to assess the need for PWHT at typical compressor stations.

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Groeneveld. L51663 Seam-Weld Quality of Modern ERW-HFI Pipe. Pipeline Research Council International, Inc. (PRCI), 1991. http://dx.doi.org/10.55274/r0010609.

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Major advances have been made in recent years in the production of electric resistance-welded (ERW) and high-frequency induction (HFI)-welded line pipe, particularly in the area of automated process control procedures designed to ensure uniform, high-quality seam welds. ERW/HFI pipe produced from microalloyed, controlled-rolled steels can be obtained in larger diameters and heavier wall thicknesses than were formerly available, and with reportedly excellent seam-weld quality as well as pipe body properties. Thus, it is feasible to consider the application of ERW/HFI pipe in a number of additio

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Graville, B. A. L51707 Factors Affecting Heat Affected Zone Root Strains in Pipeline Girth Welds and Repairs. Pipeline Research Council International, Inc. (PRCI), 1993. http://dx.doi.org/10.55274/r0010219.

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A previous study on hydrogen cracking in the heat affected zone of pipeline girth welds and repairs found that large strains in the HAZ transverse to the weld played a major role in causing cracking. Large transverse strains were believed to arise from bending of the weld due to the thermal contraction of the weld around the pipe circumference. Large root strains were simulated in the laboratory using a bend test which enabled the effect of material composition and strength to be studied. In the bend test, the specimen deflection at the onset of cracking, indicated by a drop in load, was used

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Groeneveld. L51690 Evaluation of Modern X-70 HFER Line Pipe. Pipeline Research Council International, Inc. (PRCI), 1992. http://dx.doi.org/10.55274/r0010316.

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In recent years, several pipe mills have produced heavy-wall, large diameter pipe from plates of microalloyed steels that were controlled-rolled to develop properties to meet the API 5LX Grade 70 or Grade 80 requirements and that were electric resistance welded (ERW) using advanced techniques. The use of advanced electric seam-welding practices on the steels produced using advanced steel making and processing methods offers the possibility of obtaining high strength line pipe at a lower cost than pipes produced from similar steels but with double submerged arc seam welds. The present study was

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Graville. L51764 Hydrogen Cracking in the Heat-Affected Zone of High-Strength Steels-Year 2. Pipeline Research Council International, Inc. (PRCI), 1997. http://dx.doi.org/10.55274/r0010170.

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During year 1 of this project a test to evaluate the sensitivity of the heat affected zone (HAZ) to hydrogen cracking was developed. This was in response to a need for a test which provided unambiguous results in contrast to existing test methods which often led to difficulties in interpretation. For example, WIC tests usually cracked in the weld metal rather than the HAZ and therefore did not produce a clear indication of the sensistivity of the HAZ. The new test involves a machined notch which can be placed in the HAZ thus forcing crack initiation to occur in the desired region. A further ad

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Beavers. L52015 Seam Weld Integrity of New High Strength Steels. Pipeline Research Council International, Inc. (PRCI), 2003. http://dx.doi.org/10.55274/r0011163.

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There is a concern that there may be areas of low toughness in the seam welds of submerged arc welded linepipe. These are typically associated with the Coarse Grained Heat Affected Zone (CGHAZ), and manifest themselves through low values obtained in Charpy impact and CTOD tests. Although this problem is not new, there has been renewed concern amongst linepipe users and manufacturers with the introduction of higher strength grades (X80 and upwards). A study was carried out using typical parameters for X70 and X100 grade material to investigate the structural performance of low toughness seam we

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Fiore and Boring. L52233 Evaluation of Hydrogen Cracking in Weld Metal Deposited Using Cellulosic-Coated Electrodes. Pipeline Research Council International, Inc. (PRCI), 2006. http://dx.doi.org/10.55274/r0010378.

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Cellulosic-coated electrodes (primarily AWS EXX10-type) are traditionally used for "stovepipe" welding of pipelines because they are well suited for deposition of pipeline girth welds and are capable of high deposition rates when welding downhill. Despite advances in mechanized welding technology, development of low-hydrogen self-shielded flux-cored arc welding (FCAW) consumables, and substantial improvement of basic-coated low-hydrogen vertical-down shielded metal arc welding (SMAW) electrodes, manual pipeline welding using cellulosic-coated electrodes is still widely utilized throughout the

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Buscheck, T. A., and J. J. Nitao. Estimates of the width of the wetting zone along a fracture subjected to an episodic infiltration event in variably saturated, densely welded tuff. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/60690.

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Cola and Threadgill. L51548 Criteria for Hot Tap Welding. Pipeline Research Council International, Inc. (PRCI), 1988. http://dx.doi.org/10.55274/r0010128.

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There is a frequent need in the transmission industry to modify pipe work by welding on additional pipes and branches to existing pipelines. It is very expensive to shut down the pipeline during this operation, and it is therefore, customary to make these welds onto live pipelines. This procedure must be done with great care, since a burn through would allow the leak of pressurized products. However, a greater problem is the rapid cooling of any weld due to the high heat sink effect of the flowing gas. In ferritic steel pipelines, this can lead to excessive hardening of the heat-affected zone

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