Relevant bibliographies by topics / Welding-Techniques

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Welding-Techniques'

Author: Grafiati
Published: 6 September 2023
Last updated: 7 September 2023

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Journal articles on the topic "Welding-Techniques"

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Ravi, R. "Welding Management-Techniques for Welding Leadership." Indian Welding Journal 32, no. 2 (April 1, 1999): 45. http://dx.doi.org/10.22486/iwj.v32i2.177671.

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Alajmi, Esam F., and Ahmad A. Alqenaei. "Underwater Welding Techniques." International Journal of Engineering Research and Applications 7, no. 2 (February 2017): 14–17. http://dx.doi.org/10.9790/9622-0702031417.

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SAKAI, Katsuhiko. "Monitoring techniques of Laser Welding." Journal of the Japan Welding Society 72, no. 4 (2003): 256–59. http://dx.doi.org/10.2207/qjjws1943.72.256.

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MATSUYAMA, Kin-ichi. "Simulation techniques in resistance spot welding." Journal of the Japan Welding Society 70, no. 5 (2001): 596–609. http://dx.doi.org/10.2207/qjjws1943.70.5_596.

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Komizo, Yuichi. "In situmicrostructure observation techniques in welding." Welding International 24, no. 12 (December 2010): 949–54. http://dx.doi.org/10.1080/09507111003655333.

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Łabanowski, Jerzy. "Development of under-water welding techniques." Welding International 25, no. 12 (December 2011): 933–37. http://dx.doi.org/10.1080/09507116.2010.540847.

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Massetti, F. "New welding techniques for suspension bridges." Welding International 18, no. 10 (October 2004): 785–97. http://dx.doi.org/10.1533/wint.2004.3323.

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Nixondg, J., and J. Billingham. "A survey of underwater welding techniques." Endeavour 11, no. 3 (January 1987): 143–48. http://dx.doi.org/10.1016/0160-9327(87)90203-1.

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Camilleri, D., and T. G. F. Gray. "Computationally efficient welding distortion simulation techniques." Modelling and Simulation in Materials Science and Engineering 13, no. 8 (November 17, 2005): 1365–82. http://dx.doi.org/10.1088/0965-0393/13/8/012.

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John, Merbin, Orlando Diaz, Andres Esparza, Aaron Fliegler, Derek Ocenosak, Carson Van Dorn, Udaya Bhat K., and Pradeep L. Menezes. "Welding Techniques for High Entropy Alloys: Processes, Properties, Characterization, and Challenges." Materials 15, no. 6 (March 19, 2022): 2273. http://dx.doi.org/10.3390/ma15062273.

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High entropy alloys (HEAs) are the outstanding innovations in materials science and engineering in the early 21st century. HEAs consist of multiple elements with equiatomic or near equiatomic compositions, which exhibit superior mechanical properties, such as wear resistance, fatigue resistance, and corrosion resistance. HEAs are primarily used in structural and functional applications; hence, appropriate welding processes are essential to enhancing the performances and service lives of HEA components. Herein, a comprehensive overview of current state-of-art-of welding techniques for HEAs is elucidated. More specifically, the article discusses the fusion-based welding techniques, such as gas tungsten arc welding (GTAW) and laser beam welding (LBW), and solid-state welding techniques, such as friction stir welding (FSW) and explosive welding (EB), for a broad category of HEAs. In addition, the microstructural features and mechanical properties of HEAs welded using different techniques were explained for a broad spectrum of HEAs. Finally, this review discusses potential challenges in the welding of HEAs.
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Dissertations / Theses on the topic "Welding-Techniques"

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Mollicone, Pierluigi. "Applied modelling techniques for welding induced distortions and residual stresses." Thesis, University of Strathclyde, 2006. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21655.

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Prediction of residual stresses and distortion induced by welding is relevant to many industries involved with the manufacture and assembly of thin plate structures. The ability to predict these unwanted effects on such structures subjected to welding processes is important to minimise costs associated with rework and other corrective actions. The main challenge is to model the complex and at times indeterminate nature of the welding process, preferably in a simple and transparent manner. The present work dealt with the development, validation and application of advanced simulation techniques for the prediction of welding induced residual stresses and distortions. Current literature presents a wide-ranging number of approaches, which vary in complexity and purpose, but at times fail to present a clear methodology for numerical based analysis. In the current work a commercial finite element software package was used to develop thermo-elasto-plastic models suited for this application. The proposed methodology was developed by initially analysing simple set-ups, validated through the use of experimental measurement techniques for both residual stresses and distortions predictions. This provided confidence in the application of the numerical models, which were then used to investigate more complex cases of particular interest to the shipbuilding industry. This part of the project dealt with ancillary operations, namely the initial application of tack welds and restraints on the structure, for which little attention is usually given due to their apparent insignificance compared to the final welding process. Their effects are in fact substantial and were investigated by using the thermo-elasto-plastic models together with experimental trials. A better understanding of their influence was hence illustrated, providing a basis for the establishment of a best industrial practice.
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Imani, Yousef. "Development of friction stir welding techniques for multi-axis machines." Doctoral thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27485.

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Le soudage par friction et malaxage (SFM) est un procédé d'assemblage innovant à l'état solide qui a été inventé en 1993 et qui présente des avantages significatifs par rapport aux techniques de soudage par fusion. En raison des grandes forces appliquées sur l'outil et la nécessité de maintenir un angle constant sur tout le chemin de soudage (angle d'inclinaison), ce processus est normalement effectué sur des machines coûteuses conçues spécifiquement à cette fin. La présente thèse est une tentative de faciliter l'application de soudage par friction malaxage sur les centres d'usinage CNC très communément rencontré en industrie. Une variante peu connue et peu développée de ce processus, à savoir le soudage par friction et malaxage à angle droit dans lequel l'axe d'outil est toujours perpendiculaire à la surface de la pièce a été étudié de près dans cette thèse. Des outils spéciaux pour le soudage par friction et malaxage qui sont appropriées pour cette nouvelle orientation ont été développés et les paramètres de fonctionnement de ces outils ont été mis en place. En outre, des techniques ont été investiguées pour réduire la force axiale par optimisation de la conception de l'outil et des paramètres de soudage. De plus, l'une des principales difficultés qui pourraient survenir durant les applications industrielles du soudage par friction et malaxage est l’alignement horizontal et vertical des pièces pour le soudage de joints aboutés. Une méthodologie est aussi proposée pour effectuer le soudage par friction et malaxage sur des contours 3D. La Méthode Taguchi a été utilisée pour la conception d'expériences et des modèles de réseaux neuronaux artificiels ont été formés pour l'analyse des résultats des expériences et pour l’optimisation. Il a été démontré que le soudage par friction et malaxage à angle droit a la capacité de faire des soudures saines avec limites ultimes acceptables en utilisant des valeurs plus basses de force axiale d’environ 50% par rapport au soudage par friction et malaxage typique. En outre, les plages utilisables des paramètres de conception de l'outil et des paramètres de fonctionnement ont été trouvées. Elles conduisent à la réduction de la force axiale du soudage par friction et malaxage à angle droit. Les erreurs de placement de pièces dans des joints aboutés ont aussi été investiguées conduisant à une définition des plages acceptables d’erreur avec la méthode de soudage à angle droit. Les techniques développées ont aussi été validées dans la mise en œuvre du soudage par friction et malaxage pour les joints 2D et 3D. De plus, la méthodologie proposée pour le soudage sur contours 3D a été validée avec succès en soudage sur une pièce particulière en utilisant une machine CNC à 5 axes dans les deux configurations de joints aboutés et superposés.
Friction stir welding (FSW) is an innovative solid state joining method invented at the end of twentieth century and having significant advantages over fusion welding techniques. Due to the high amount of forces applied on the FSW tool and the need to keep a constant angle all over the welding path (tilt angle), this process in normally performed on costly machines designed specifically for it. The present thesis is an attempt to facilitate the implementation of friction stir welding on common CNC machining centers. A less considered variant of this process, namely right angle FSW in which the tool axis is always perpendicular to the surface of workpiece has been closely studied and investigated. Special FSW tools which are appropriate for this new orientation have been developed and operating parameters for these tools have been established. In addition, techniques were developed to reduce the axial force through optimization of tool design and welding parameters. Moreover, one of the major difficulties which could be encountered during industrial applications of FSW, joint fit-up issues have been explored and attempts were made to manage these issues. A methodology has been proposed for FSW over 3D contours. Taguchi method has been used for design of experiments and artificial neural network models have been trained for analysis of results of experiments and optimization. It has been shown that the right angle FSW have the capacity of making sound welds with acceptable UTS employing lower values of axial force in comparison to typical FSW. Furthermore, workable ranges of tool design and welding parameters were found that leads to reduction of axial force within right angle FSW. To tolerate for joint fit-up issues, regions of operating parameters were established that could manage typical values of gap and mismatch. The developed techniques have also been validated and implemented for joining on 2D and 3D paths. In addition, the 3D methodology has been successfully validated in welding a complex part using a 5 axis CNC machine in both butt and lap configurations.
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Britos, Pedro J. Gimenez. "Probability of detection in friction stir welding using nondestructive evaluation techniques." Thesis, Wichita State University, 2010. http://hdl.handle.net/10057/3295.

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When available, the force feedback data from Friction stir welding (FSW) can be very useful for analyzing weld quality. Friction Stir Welding Analysis Tool software (FSWAT), a new process based non-destructive evaluation (NDE) technique developed at the South Dakota School of Mines and Technology, is designed to analyze any specified section of FSW in real time (with a slight computational delay). With this software, a trained operator or inspector can detect where potential flaws may exist. Another powerful NDE technique is ultrasonic phased array (UPA), which is well known for its capability to detect different kinds of friction stir welding indications and defects. The purpose of this study is to compare the defects identified in a round robin investigation using UPA and electromagnetic radiation X-ray inspection with the defects identified by the FSWAT software data analysis program. In addition, actual destructive tests are used to correlate the identified defects with actual defects. A probability of detection (POD) analysis is carried out to evaluate the wormhole-detection performance of the different NDE methods applied currently in industry. By correlating this software with UPA and X-ray inspection, the time and expense associated with 100% inspection of parts could be considerably reduced. The ultimate goal of this research is to support the development of real-time quality control to minimize the cost of inspection.
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering.
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Nagy, T. "Investigation of thermal techniques to mitigate buckling distortion in welding panels." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7798.

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This thesis describes the advancements of the application of thermal tensioning techniques to different weld geometries in order to eliminate buckling distortion. The main goal of this work is to better understand these techniques through experimental and numerical investigation and increase their technological maturity to aid industrial implementation. The thermal tensioning techniques investigated in this work are Thermal Tensioning by Cooling and Thermal Tensioning by Heating. The investigation for both techniques encompasses thermal source characterisation, application to different weld geometries and residual stress measurements and analysis of both butt and fillet welded samples. A detailed technology transfer study of Thermal Tensioning by Cooling was carried out in which different aspects of the application of TTC to arc welding (Gas Metal Arc Welding and Gas Tungsten Arc Welding) was examined. This study focused on the influence of both the liquid CO2 delivery system installation and welding tooling and jigging on the effectiveness of Thermal Tensioning by Cooling in reducing buckling distortion. Experimental and numerical cooling source characterisation was also carried out in the Thermal Tensioning by Cooling work to investigate the characteristics of the cooling source under different cooling conditions. The Thermal Tensioning by Cooling work was then concluded with welding trials and residual stress measurement and analysis. The results of the Thermal Tensioning by Cooling study show that the installation of the liquid CO2 delivery system as well as the welding tooling and jigging has a major influence on the effectiveness of Thermal Tensioning by Cooling in reducing buckling distortion. The cooling source characterisation work reveals that the most important parameter of the cryogenic nozzle delivery system used in this work is the Air Entrainment Gap. A description of a control system of Thermal Tensioning by Cooling is suggested based on controlling the Air Entrainment Gap. The residual stress analysis shows a reduction in the Applied Weld Load and minor changes in the tensile peak of the residual stress distribution of both butt and fillet welded panels. The Thermal Tensioning by Heating investigation includes heat source characterisation, application of Thermal Tensioning by Heating on butt and fillet welds, utilisation of alternative heat sources and residual stress analysis. The results of these investigation show that Thermal Tensioning by Heating is also highly effective in eliminating buckling distortion in butt, fillet and overlapped panels. The applied heating temperature in this work is typically in the range of 160-250 °C but not greater than 330 °C. The residual stress measurements reveal that the additional heating of Thermal Tensioning by Heating generates a positive stress gradient at the location of heating.
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Ablewhite, J. D. "The application of artificial intelligence techniques to the control of spot welding." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635839.

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With the widespread use of zinc coated steels in the manufacture of high volume spot welded assemblies, such as the automotive body-in-white, there is a need to address the inherent difficulties in welding this particular product. The presence of the zinc coating increases the rate of degradation of the welding electrodes, and so there is a need for frequent electrode maintenance to combat the deterioration in weld quality associated with electrode wear. This results in short production runs and reduced productivity. Pre-programmed current stepping of the welding current may be used to compensate for the reduction in weld size with electrode wear, and so extend electrode life. However, this open-loop technique is difficult to optimise, particularly when welding zinc coated steel. In order to develop a feedback control system for current stepping, it is necessary to relate the weld diameter to some measurable parameter, in order to perform continuous monitoring of the weld quality. In view of the difficulty of deriving a suitable mathematical description of the physical process, on which to base a control algorithm, alternative techniques for spot weld quality monitoring and control have been examined. A neural network based model of the spot welding process has been produced, to predict weld quality from the measured electrical data. Guidelines have been developed for selecting the ideal network parameters for maximising the prediction performance over the life of the welding electrodes. In order to overcome the difficulties observed in optimising the pre-programmed current stepping control system, the feasibility of using a rule based fuzzy logic controller has been assessed. Rules were defined for determining the required step change in welding current to maintain weld quality, given the diameter of the previous weld and the estimated electrode tip diameter.
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Taylor, W. A. "Generation of welding procedures for the submerged arc process using expert system techniques." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381901.

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Oba, Koichi. "Flat Roofs : Investigation of Heat Welding Techniques for Polymer-Modified Bituminous Roofing Membranes." Doctoral thesis, KTH, Byggvetenskap, 1994. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34490.

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Abdulhadi, Abdulwanis Abdalla. "Evaluation of spot welding electrodes using digital image processing and image segmentation techniques." Thesis, Liverpool John Moores University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589998.

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The image segmentation algorithm is the most challenging step and requires more computer processing power than the boundary filtering, and the Cullen et al's method, which used the Cullen et al's method to determine the electrodes tip width automatically in the automotive industry in real time. Spot welding is used extensively in the automotive industry. The quality of an individual spot weld is a major concern due to the heavy reliance on their use in the manufacture of motor vehicles. The main parameters that control the quality of a spot weld are current, voltage, welding force, welding time, and the quality of welding electrodes. The condition of the welding electrodes plays a major part in determining the quality of a spot weld. For example, excessive electrode wear can occur during the welding process and can cause weakening in the weld nuggets. As the number of welds increases, the electrode tip wears down and so the contact area between electrode tip and work piece increases. In order to determine the quality of the welding electrodes, a machine vision approach is employed, where images of the electrode tips in real time are captured and are processed using various image-processing algorithms. These algorithms can be used to automatically measure the electrode tip width and hence assess the quality of the electrodes tip in real time. The quality of two types of spot welding electrode tips, namely flat-shaped and dome-shaped tips, is assessed here using image processing techniques. For each tip type, a database of 250 images is used to test the performance of the tested algorithms. Also the tip width in these 250 images is determined manually by counting the number of pixels using an image editor such as Microsoft Paint. An excellent agreement is found between these manual and automatic methods. The tip width for an electrode is measured by first grabbing an image showing the electrode. The electrode in the image is then extracted using an image segmentation algorithm. Then the boundary of the electrode is determined and filtered. The Cullen et aI's method is subsequently applied, which uses the filtered boundary to determine the tip width. A number of image segmentation and boundary filtering algorithms have been used to determine the tip width automatically. For flat tip electrode, the combination of the region growing image segmentation, Minimum Perimeter Polygon, and Cull en et al's techniques was capable of automatically determining the tip width for 250 images with a root mean square error of 7.5 % of the tip width. For dome-shaped electrodes, the combination of the Snake segmentation algorithm, Fourier transform, and the Cullen et al's method was capable of automatically determining the tip width for 250 images with a root mean square error of2.9 % of the tip width. The author has proposed and built an active illumination system that captures a backlit image of the electrode's shadow, this system has different camera with same time then above. The image is then processed using a simple image segmentation method, such as the Canny filtering algorithm to locate the boundary of the electrodes tip. Then the boundary is processed using Minimum-Perimeter Polygon approach and Cull en et aI's method to automatically determine the tip width for 200 experiments images. The proposed system is capable of determining the tip width automatically with a root mean square error of 3.2% of the total tip width for flat tips and 3% for dome tips.
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Song, Haoshi. "Applications of finite element techniques in the simulations of structure interactions during welding." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/13713.

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Tzevelekos, P. "Development and application of advanced plasma welding techniques for high strength aluminium alloys." Thesis, Cranfield University, 1999. http://dspace.lib.cranfield.ac.uk/handle/1826/11395.

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The main aims of this study are to generate a methodology for the optimisation of welding procedures for plasma welding of thin sheet aluminium alloys and to investigate weld quality modelling. Emphasis is focused on the recognition and evaluation of the consecutive stages of welding procedure development and on the formulation of a generalised procedural methodology that is potentially applicable to other processes and materials. The materials under investigation were 1.6 mm thick sheet 6013, 2024 and 7475 alloys, representing the major medium and high strength heat treatable aluminium groups used in the aerospace industry. Initial experimentation generated procedures relating to specimen and equipment pre-weld preparation. Bead on plate and square butt joint trials were performed in the downhand position. The plasma keyhole mode was operated autogenously while filler wire addition was employed for the melt-in mode. Arc monitoring techniques were used to log the arc voltage and welding current values. The effect of background and control parameters on process performance and joint quality was studied and used to generate operating envelopes and reveal optimum welding conditions. Geometrical data from the melt-in joints of all alloys were employed to build joint geometry prediction statistical models. Numerical algorithms, based on the information generated by the statistical models, were used to create joint geometry optimisation techniques. Calorimetric experiments and x-ray examination of joints revealed the relationship between major operating parameters and arc efficiency and the incidence of porosity, suggesting desired welding conditions that were incorporated in the optimisation process. Finally, two software tools for Joint Geometry Prediction and Welding Procedure Optimisation were developed, incorporating the knowledge and information created during the modelling and optimisation stages. These provide the end user with a means of process parameter selection and visualisation of the influence of parameter variation on weld bead geometry.
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Books on the topic "Welding-Techniques"

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H, Griffin Ivan, ed. Pipe welding techniques. Albany, N.Y: Delmar Publishers, 1985.

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Chaturvedi, Mukti, and S. Arungalai Vendan. Advanced Welding Techniques. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3.

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L, Lynn Donald, and Nickel A. J, eds. Welding management: Techniques for welding leadership. Rockford, Ill: Fabricators & Manufacturers Association, 1997.

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Ballis, William L. Arc welding: Theories & techniques. Columbus: Greyden Press, 1997.

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Cryer, Peter. Welding: Techniques and ruralpractice. Melbourne: Inkata, 1996.

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Cryer, Peter. Welding: Techniques and rural practice. [Melbourne, Australia]: Inkata Press, 1996.

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International, Creative Publishing, ed. Welding complete: Techniques, project plans & instructions. Minneapolis, Minn: Creative Pub. International, 2009.

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Anderson, P. C. J. A review of techniques to manage penetration variability during TIG welding. Cambridge: TWI, 1996.

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Međunarodno znanstveno-stručno savjetovanje Tehnologična primjena postupaka zavarivanja i zavarivanju srodnih tehnika u izradi zavarenih konstrukcija i proizvoda (4th 2007 Slavonski Brod, Croatia). Zbornik radova: 4. Međunarodno znanstveno-stručno savjetovanje Tehnologična primjena postupaka zavarivanja i zavarivanju srodnih tehnika u izradi zvarenih konstrukcija i proizvoda, Slavonski Brod, 14.-16. studeni 2007 = Conference proceedings : the 4th International scientific-professional conference Cost effective application of welding processes and welding related techniques in manufacturing of construction and products, Slavonski Brod, November 14-16, 2007. Slavonski Brod: Strojarski fakultet, 2007.

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Međunarodno znanstveno-stručno savjetovanje Tehnologična primjena postupaka zavarivanja i zavarivanju srodnih tehnika u izradi zavarenih konstrukcija i proizvoda (4th 2007 Slavonski Brod, Croatia). Zbornik radova: 4. Međunarodno znanstveno-stručno savjetovanje Tehnologična primjena postupaka zavarivanja i zavarivanju srodnih tehnika u izradi zvarenih konstrukcija i proizvoda, Slavonski Brod, 14.-16. studeni 2007 = Conference proceedings : the 4th International scientific-professional conference Cost effective application of welding processes and welding related techniques in manufacturing of construction and products, Slavonski Brod, November 14-16, 2007. Slavonski Brod: Strojarski fakultet, 2007.

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Book chapters on the topic "Welding-Techniques"

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Welding: An Overview." In Advanced Welding Techniques, 1–15. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_1.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Decision Making in Welding Design." In Advanced Welding Techniques, 17–33. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_2.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Friction Stir Welding and Design." In Advanced Welding Techniques, 133–65. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_6.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Tungsten Inert Gas Welding and Design." In Advanced Welding Techniques, 63–88. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_4.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Laser Beam Welding and Design." In Advanced Welding Techniques, 89–131. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_5.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Magnetic Pulse Welding and Design." In Advanced Welding Techniques, 167–97. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_7.

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Chaturvedi, Mukti, and S. Arungalai Vendan. "Resistance Spot Welding and Design." In Advanced Welding Techniques, 35–61. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6621-3_3.

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Tres, Paul A. "Welding Techniques for Plastics." In Designing Plastic Parts for Assembly, 83–166. München: Carl Hanser Verlag GmbH & Co. KG, 2014. http://dx.doi.org/10.3139/9781569905562.005.

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Tres, Paul A. "Welding Techniques for Plastics." In Designing Plastic Parts for Assembly, 85–168. München: Carl Hanser Verlag GmbH & Co. KG, 2017. http://dx.doi.org/10.3139/9781569906699.005.

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Tres, Paul A. "Welding Techniques for Plastics." In Designing Plastic Parts for Assembly, 101–86. 9th ed. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9781569908211.005.

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Conference papers on the topic "Welding-Techniques"

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Beyer, E., B. Brenner, and R. Poprawe. "Hybrid laser welding techniques for enhanced welding efficiency." In ICALEO® ‘96: Proceedings of the Laser Materials Processing Conference. Laser Institute of America, 1996. http://dx.doi.org/10.2351/1.5059055.

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Pantsar, Henrikki, Jack Gabzdyl, Elke Kaiser, Tim Hesse, Marc Kirchhoff, Birgit Faisst, and Eva-Maria Dold. "New welding techniques and laser sources for battery welding." In High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VII, edited by Stefan Kaierle and Stefan W. Heinemann. SPIE, 2018. http://dx.doi.org/10.1117/12.2291078.

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Pedapati, Srinivasa Rao, Shasidaran, Subhash Kamal, and A. M. A. Rani. "Optimum welding parameter for GMA welding using soft computing techniques." In ADVANCED MATERIALS FOR SUSTAINABILITY AND GROWTH: Proceedings of the 3rd Advanced Materials Conference 2016 (3rd AMC 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.5010509.

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McCay, M. H., T. D. McCay, C. M. Sharp, and N. B. Dahotre. "Laser Welding Techniques for Alloy 718." In Superalloys. TMS, 1991. http://dx.doi.org/10.7449/1991/superalloys_1991_719_734.

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Newman, K. R., P. A. Brown, W. O. Van Arnam, L. C. Wolhart, and S. Wolhart. "Analysis of Coiled Tubing Welding Techniques." In SPE Gulf Coast Section/ICoTA North American Coiled Tubing Roundtable. Society of Petroleum Engineers, 1996. http://dx.doi.org/10.2118/36346-ms.

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Holdsworth, R. "Underwater Welding Techniques & Technologies." In OCEANS '86. IEEE, 1986. http://dx.doi.org/10.1109/oceans.1986.1160561.

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Erasenthiran, Poonjolai, R. Ball, Kenneth G. Watkins, William O'Neill, and William M. Steen. "Laser edge-welding in layered manufacturing techniques." In Advanced High-Power Lasers and Applications, edited by Xiangli Chen, Tomoo Fujioka, and Akira Matsunawa. SPIE, 2000. http://dx.doi.org/10.1117/12.377039.

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Xue, Long, Tao Lv, Yong Zou, Zunguang Guo, and Lili Xu. "Hyperbaric Welding Maintenance Techniques of Subsea Pipeline." In International Conference on Pipelines and Trenchless Technology (ICPTT) 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41073(361)10.

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Przydatek, Jan, and David Howath. "Classification Society Views on Two Innovative Welding Techniques." In European Shipbuilding in the 21st Century. RINA, 2000. http://dx.doi.org/10.3940/rina.cs.2000.03.

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Griebsch, Juergen, Peter Berger, Friedrich Dausinger, and Helmut Huegel. "Diagnostic techniques and process monitoring of pulsed laser welding." In Optics for Productivity in Manufacturing, edited by Rolf-Juergen Ahlers, Peter Hoffmann, Hermann Lindl, and Ruediger Rothe. SPIE, 1994. http://dx.doi.org/10.1117/12.193112.

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Reports on the topic "Welding-Techniques"

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Strain, R. V., K. H. Leong, and D. L. Smith. Development of laser welding techniques for vanadium alloys. Office of Scientific and Technical Information (OSTI), April 1996. http://dx.doi.org/10.2172/270414.

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Strain, R. V., K. H. Leong, and D. L. Smith. Development of laser welding techniques for vanadium alloys. Office of Scientific and Technical Information (OSTI), October 1996. http://dx.doi.org/10.2172/415824.

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Strain, R. V., K. H. Leong, E. E. Keppler, and D. L. Smith. Subtask 12B2: Development of laser welding techniques for vanadium alloys. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/415175.

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Harris, Patel, and Vaze. PR-185-0351-R07 Welding Processes for Small to Medium Diameter Pipe - Productivity and Economic Analysis. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2006. http://dx.doi.org/10.55274/r0011066.

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The project aimed to develop innovative welding processes and technologies for single-sided pipeline girth welding. Root pass welding techniques were emphasized since they have the greatest potential to improve pipeline integrity and facilitate the use of new and existing gas metal arc welding (GMAW) fill pass techniques. Advanced automation techniques were also used to improve weld quality, process control, and robustness. The objective of Task 7 was to examine the competing productivity and economic factors involved in selecting the appropriate technology for a particular pipeline project.
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Reichert, Harris, and Vaze. PR-185-0351-R04 Welding Processes for Small to Medium Diameter Pipelines - Improved Root Pass Techniques. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2006. http://dx.doi.org/10.55274/r0011070.

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The purpose of this portion of the project was to develop improved root pass automation (Task 3) and process control systems (Task 4) for girth welding of pipeline butt joints. To achieve these goals a motion control module was developed for control of a track-mounted Serimer-Dasa welding tractor (bug). The module includes a software program that can communicate with a motion controller and control all motions of the axes.
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Wang, Yong-Yi. PR-350-124504-R02 Essential Welding Variables Methodology for X70-X65 Linepipe Steels. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2015. http://dx.doi.org/10.55274/r0010887.

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High productivity mechanized welding processes, such as variants of multi-wire pulsed-gas metal arc welding (GMAW-P) have become increasingly popular due to their high production rates. Compared to the conventional single-wire GMAW processes, the high-productivity pro-cesses are more complex in welding procedure design, qualification, and field welding. The characteristics of these high productivity processes are different from that of the traditional sin-gle-wire/single-torch GMAW or shielded metal arc (manual) welding (SMAW) processes that have dominated pipeline construction in the past. The objective of this project is to validate the essential welding variable methodology (EWVM) for welding of X70/X65 line pipes steels by modern, high-productivity pulsed-gas metal arc welding (GMAW-P) techniques to achieve de-sired weld properties while keeping the cost and time of welding procedure qualification to a minimum level.
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Bruce, Berg, and Agrawald. L52304 Development of Criteria-Guidelines for Welding Onto In-Service Chemical Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), September 2009. http://dx.doi.org/10.55274/r0010678.

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Welding onto in-service pipelines and piping systems allows cost-effective installation of branchconnections (hot taps) and repair sleeves. Beyond the normal in-service welding concerns ofburnthrough and hydrogen cracking, there are often additional concerns when welding ontopipelines and piping systems in chemical service. For example, some products can undergochemical changes when exposed to the heat from an in-service weld. In spite of these concerns,some companies routinely weld on lines in chemical and other potentially hazardous service,although limitations and special precautions are often specified. Examples include wallthickness limitations below which in-service welding is not permitted and the use of weldingprocedures that limit heat input. The objective of this project was to review the concerns forwelding on in-service pipelines in chemical service, the techniques that have been used in thepast to address these concerns, and to develop criteria that will allow this type of welding to becarried out safely. Criteria for in-service welding were developed for a wide range of chemicals that were identified as being of interest. The format for these criteria is similar to material safety data sheets (MSDSs). Many of the potential concerns that were identified can be controlled by limiting the inside surface temperature. Factors that affect inside surface temperature include: (1) pipe wall thickness, (2) the introduction of heat into the pipe wall by the welding process, and (3) the removal of heat by the contents. For many of the concerns that were identified, if protection from burnthrough using the inside surface temperature approach is practiced, protection from these other concerns is also accomplished. The ability to accurately control heat input levels is an important aspect of being able to weld safely onto in-service pipelines, particularly when inside surface temperature needs to be limited. Methods for controlling heat input levels in the field were reviewed and detailed guidance was developed. The benefits of using small-diameter electrodes (lower current levels), which allows the attachment of a hot tap fittings at relatively low heat input levels, were identified. Techniques to address other concerns that are not inside surface temperature related were also identified.
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Wang, Yong-Yi, and Dan Jia. PR-350-124504-R03 Essential Welding Variables Methodology for X70 Linepipe Steels. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2019. http://dx.doi.org/10.55274/r0011567.

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High productivity mechanized welding processes, such as variants of multi-wire pulsed-gas metal arc welding (GMAW-P) have become increasingly popular due to their high production rates. Compared to conventional single-wire/single-torch GMAW processes, the higher productivity variants of the GMAW processes are more complex in welding procedure design, qualification, and field welding, which leads to more complex heating and cooling cycles. As a result, the deposited weld metal and heat-affected zone (HAZ) performance can be quite different from those from more traditional welding processes applied to the same materials. These changes have not been adequately considered and incorporated into essential welding variables in codes and standards. The objective of this project is to validate the essential welding variable methodology (EWVM) for welding of X70 line pipe steels by modern, high-productivity pulsed-gas metal arc welding (GMAW-P) techniques to achieve desired weld properties while keeping the cost and time needed for welding procedure qualification to a minimum. Four girth welds with various combinations of heat input and torch configurations were made using GMAW-P. The microstructure response and mechanical properties of weld metal and/or HAZ by testing thermally simulated weld and pipe steel base metals were analyzed. Correlation of welding parameters and thermal history was summarized. The application of EWVM is briefly presented in a step by step procedure. The girth weld properties demonstrate the sensitivity of thermal cycles and the ability of EWVM to predict the trend of the properties. In the long run, welding procedure qualifications focusing on the control of cooling rate could allow a reduction in the number of essential variables.
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Nageswaran, Channa. PR-164-114512-R01 CRA Weld Overlay Pipes for Subsea Application. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2013. http://dx.doi.org/10.55274/r0010813.

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A literature search was executed to find recorded applications of welding process weld overlay manufacture. Based on the literature review TIG welding was selected for the fabrication of weld overlay in this project. TIG welding with both hotwire and cold wire addition was investigated and a procedure has be developed for producing 4mm thick cladding with �Fe� content less than 5% on the surface. Capability of currently available NDT techniques for the inspection of flaws in TIG welded overlays has been investigated. Plate samples were manufactured and inspected with the developed procedures. Small scale and full scale fatigue testing was carried out to understand the effect of weld over cladding on fatigue performance. This document reports details and results.
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Schipaunboord, W. N., M. A. Lont, and A. H. M. Kron. JTM-00-01 NDE Acceptance Criteria for Girth Defects Linked with Welding and Inspection Technique. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 2001. http://dx.doi.org/10.55274/r0011796.

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Experimental work was conducted on two girth welds in large diameter steel pipes. By a proper selection of welding consumables, yield strength mismatch was obtained from 5 to 12% undermatching and 45% overmatching. The girth welds were non-destructively tested using the time of flight diffraction technique by three NDE companies. The verification of the detection and sizing capabilities of TOFD inspection techniques has shown that the performance levels varied widely. This finding confirms the need to validate the NDE techniques. Tensile specimens, Charpy and CTOD specimens, and curved wide plate testes were taken out of the welded pipes for testing the mismatch ratio, fracture toughness behavior and failure mechanisms. The wide plate tests were supported by an ECA using BS 7910. This work has reconfirmed the validity of the basic toughness and overmatch requirements given by EPRG for the application of the Tier 2 defect limits. The wide plate tests demonstrated that failure to satisfy one (or both) of these requirements results in a significant reduction of the acceptable defect length limit. The derivation of ECA-based NDE acceptance criteria is not specified in the present standards. The way to deal with the performance of welding technique, the NDE systems and its relation to ECA-based acceptance criteria is not prescribed. In the present Dutch project the derivation of ECA-based acceptance criteria will be validated by a probabilistic approach. This approach is based on Monte Carlo simulations by which the effects of weld defect population; the NDE performance and acceptance criteria on the repair rate and integrity level can be investigated.
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