Relevant bibliographies by topics / Welding geometric characteristic

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Welding geometric characteristic'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Welding geometric characteristic"

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Hua, Liang, Yujian Qiang, Ling Chen, Juan Yao, Feipeng Liu, and Juping Gu. "Key Image Processing Techniques Used in Laser Welding." Journal of Robotics and Mechatronics 27, no. 1 (2015): 24–31. http://dx.doi.org/10.20965/jrm.2015.p0024.

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<div class=""abs_img""><img src=""[disp_template_path]/JRM/abst-image/00270001/03.jpg"" width=""500"" /> Welding image and weld pool edge</div> Machine vision techniques are widely used with automatic laser-welding robots. Existing systems acquire geometrical information on both the weld seams and molten pool by using a single camera and then processing a single image. The recognition of weld seams is thus obviously affected by the arc, plasma, spatter, etc. This study examined a novel, cost-effective weld image acquisition and processing system with real-time performance, wh
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Nam, Yong Yun, Seung Ho Han, Jeong Woo Han, and Byung Chun Shin. "A Representative Stress Model Removing Weld Joint Type Dependency of S-N Curve." Key Engineering Materials 353-358 (September 2007): 2061–64. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.2061.

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The hot spot stress or the notch strain alleviates the welding detail dependency of S-N curve to some extent. This paper suggests a new stress model which alleviates the dependency further, thus the fatigue strengths of several welding details of same material can be evaluated with the S-N curve of the base material. A stress at the hot spot of a weld joint is decomposed into two components; linear rising one, and rapid rising one which is inversely proportional to the distance from the hot spot. For the stress decomposition, a formula is proposed with which the configuration of stress distrib
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Šugra, Filip, Milan Marônek, Jozef Bárta, Michaela Lopatková, and Miloš Mičian. "Influence of Surface Roughness on Selected Geometric Characteristics of Laser Beam Welded Joints of AW 2099 Alloy." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 28, no. 47 (2020): 56–64. http://dx.doi.org/10.2478/rput-2020-0019.

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Abstract Al-Li alloys are used in various industries owing to their good mechanical and physical properties. However, one of the limiting factors of welding the aluminium alloys by laser beam is the high reflectivity of the beam and thus the reduced efficiency of the laser. Reduction of reflectivity can be achieved by increasing the surface roughness, which may have a beneficial effect on the absorption of the laser, resulting into affecting the weld bead dimensions. The paper deals with the analysis of the influence of surface roughness of welded materials on geometry of welded joints. Specim
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Peredelsky, V. A., V. Y. Harchenko, A. I. Chernogorov, and S. V. Tihinov. "On detection of crack-like welding defects by existing quality control methods." Advanced Engineering Research 21, no. 1 (2021): 89–95. http://dx.doi.org/10.23947/2687-1653-2021-21-1-89-95.

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Introduction. The research materials devoted to the operability assurance of welded structures of hazardous technical devices — components of oil and gas production equipment are summarized. The factors determining the operational strength of welded joints and structures are systematized and diagrammed. The causes for the decrease in their service properties are described. We have defined the role of volumetric and crack-like welding defects, which were not detected during quality control at the manufacturing stage and in determining the residual life while in operation, in ensuring the life c
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Ene Căscătău, Andreea Mădălina, Patrice Plassais, and Marian Gheorghe. "Geometric Deformations of Welded Metallic Structures." Applied Mechanics and Materials 657 (October 2014): 342–47. http://dx.doi.org/10.4028/www.scientific.net/amm.657.342.

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Various research on the influence of different process parameters on quality characteristics of metallic structures assembled by welding have been accomplished [1 - 8, etc.]. The deformations of metallic structure components assembled by welding depend on the characteristics of the components, welded gap, welding speed, scheme and time of components fixing, etc. The paper presents the data and main results of an experimental research on the influence of two process parameters - the welding gap and the fixing time of the components - on the geometric deformations of certain metallic structure c
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Agustriyana, Lisa. "KARAKTERISASI HASIL PENGELASAN GTAW PADA BAJA KARBON RENDAH DENGAN VARIASI SUDUT GEOMETRI ELEKTRODE DAN BESAR ARUS PENGELASAN." INFO-TEKNIK 19, no. 1 (2018): 101. http://dx.doi.org/10.20527/infotek.v19i1.5145.

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In the application of welding "GTAW" has several advantages such as
 welding results do not need to be cleaned from slag or corrosion residue. Due to
 the above-mentioned advantages, the precise determination of weld parameters
 and offset by the welding skills of welded characteristics will be affected. The
 purpose of this research is to know the characteristic of GTAW welding on low
 carbon steel, by observing the shape of weld bead and supported by the result of
 macro photo of welding result from various variations of currents and variations
 of the angl
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Zhen, Ren He, and Xiang Dong Gao. "Extraction of Molten Pool and Keyhole Characteristics during High Power Fiber Laser Welding." Advanced Materials Research 532-533 (June 2012): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.532-533.344.

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It is well known that weld pool geometry plays a critical role in laser welding. In this study, an IPG YLR-10000 device was used to capture a series of molten pool images during high power fiber laser welding process. Then an extraction method of the geometric characteristics of these images was developed. This method could be applied to monitor the configuration of a molten pool and keyhole which was related to welding quality. The experimental results showed that this method was a reliable inspection method for monitoring the configuration of molten pool during high power fiber laser welding
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Seong, Woo-Jae. "Prediction and Characteristics of Angular Distortion in Multi-Layer Butt Welding." Materials 12, no. 9 (2019): 1435. http://dx.doi.org/10.3390/ma12091435.

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Multi-layer welding involves the process of stacking many beads, so it requires much time and effort to predict the deformation through experimentation or numerical analysis. In this study, a systematic method for predicting transverse angular distortion in multi-layer butt welding has been proposed. First, the database was established through bead-on-plate welding experiments, which consisted of the relationship between welding conditions, the bead geometry, the material thickness, and the angular distortion. Then, when the arbitrary welding conditions and the shape of the butt joint were inp
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Bezerra, A. C., L. C. Vieira, D. A. Rade, and A. Scotti. "On the Influence of Welding Residual Stresses on the Dynamic Behavior of Structures." Shock and Vibration 15, no. 3-4 (2008): 447–58. http://dx.doi.org/10.1155/2008/683506.

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It is widely known that welding processes induce the generation of residual stresses, which, through the so-named stress stiffening effect, can influence the static and dynamic behavior of the welded components. Thus, accounting for this influence becomes important for the understanding of experimental observations and accurate modeling of the dynamic behavior. In this study, the numerical and experimental characterization of the influence of welding residual stresses on the flexural dynamic characteristics of rectangular plates is addressed. It is suggested a general modeling methodology base
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Ivanchenko, Alexander B., I. P. Tochilin, and Aleksey V. Zhdanov. "Thermal State Simulation of Welded Steel Plates under Laser Welding Conditions." Solid State Phenomena 316 (April 2021): 396–401. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.396.

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The article describes a method for determination of the welded parts temperature pattern under laser welding conditions. An algorithm is engineered to solve the non-stationary heat conduction problem by finite element method. The boundary conditions are determined by the molten pool parameters and depend on the welding regime characteristics. The dependencies for determining the molten pool geometric dimensions for laser welding conditions are proposed. Calculations of the temperature pattern change during the steel plates joint by laser welding are carried out. It is shown that the proposed m
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Dissertations / Theses on the topic "Welding geometric characteristic"

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Pessoa, Edson Frota. "ESTUDO EXPLORATÃRIO DA SOLDAGEM MIG/MAG COM DUPLO ARAME EMPREGANDO CORRENTE ALTERNADA." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4084.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Este trabalho teve como objetivo o estudo exploratÃrio do processo MIG/MAG-DA-PI utilizando corrente alternada. Os ensaios foram executados em simples deposiÃÃo na posiÃÃo plana em chapas de aÃo baixo carbono com espessura de 3 mm utilizando arame eletrodo de 1,2 mm de diÃmetro. Foram realizados estudos sobre o nÃvel de corrente, tipo de onda aplicado em corrente alternada (CA-CP e CA-CC), a porcentagem de corrente alternada com o eletrodo na polaridade negativa (% CAEN), o sentido de deslocamento do eletrodo em relaÃÃo ao tipo de
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Lin, Yu-Jui, and 林祐瑞. "Effect of geometric characteristics of tool with thread on material flow in friction stir spot welding." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/79420338492914026154.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>102<br>In this thesis, the effects of different process parameters on material flow with different geometric tools during friction stir spot welding (FSSW) are discussed. The experimental were divided into two parts. In the first, the welding specimens were used to investigate the material flowing behaviors during FSSW, and the strength under tensile tests was compared, Tool speeds range from 450 rpm to 2700 rpm, a plunging rate of 1 mm/s, a plunging depth of 2.8 mm and holding time of 1s, 1.2s, 1.5s, 2s, 3s, 3.6, 4.5s, 6s, 9s, 18s. In the second part, tool force an
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Book chapters on the topic "Welding geometric characteristic"

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Rao, R. Venkata. "Modeling and Optimization of Gas Metal Arc Welding (GMAW) Process." In Computational Methods for Optimizing Manufacturing Technology. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0128-4.ch014.

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Weld quality is greatly affected by the operating process parameters in the gas metal arc welding (GMAW) process. The quality of the welded material can be evaluated by many characteristics, such as bead geometric parameters, deposition efficiency, weld strength, weld distortion, et cetera. These characteristics are controlled by a number of welding process parameters, and it is important to set up proper process parameters to attain good quality. Various optimization methods can be applied to define the desired process output parameters through developing mathematical models to specify the relationship between the input parameters and output parameters. The method capable of accurate prediction of welding process output parameters would be valuable for rapid development of welding procedures and for developing control algorithms in automated welding applications. This chapter presents the details of various techniques used for modeling and optimization of GMAW process parameters. The optimization methods covered in this chapter are appropriate for modeling and optimizing the GMAW process. It is found that there is high level of interest in the adaptation of RSM and ANN techniques to predict responses and to optimize the GMAW process. Combining two optimization techniques, such as GA and RSM, would reveal good results for finding out the optimal welding conditions. Furthermore, efforts are required to apply advanced optimization techniques to find out the optimal parameters for GMAW process at which the process could be considered safe and more economical.
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Gupta, Rajat, Kamal Kumar, and Neeraj Sharma. "Multi-Performance Optimization in Friction Stir Welding of Aluminum Alloy Using Response Surface Methodology." In Advances in Computational Intelligence and Robotics. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4766-2.ch011.

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This chapter presents the friction stir welding (FSW) of aluminum alloy AA-5083-O using vertical milling machine. In present FSW experimentation, effects of different process parameter namely tool rotation speed, welding speed, tool geometry, and tool shoulder diameter have been determined on welding quality of two pieces of AA-5083-O using response surface methodology (RSM). The optimal sets of process parameters have been determined for weld quality characteristics namely tensile strength (UTS) and percentage elongation (%EL). In present experimentations, a specially designed tool made of high carbon steel with different shoulder diameters (15mm, 17.5mm, and 20 mm) having constant pin length (6 mm) were used for FSW of two pieces of aluminum alloy. The ANOVA and pooled ANOVA were used to study the effect of FSW parameters on UTS and %EL. Multi response optimization has been carried out using desirability function in conjunction with RSM to obtain the optimal setting of process parameters for higher UTS and lower %EL.
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Conference papers on the topic "Welding geometric characteristic"

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Bag, Swarup, and M. Ruhul Amin. "Simulation Based Study on Ultra-Short Pulse Laser Welding of Dissimilar Materials Expending Phase Lag Influence." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70068.

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In this work, the thermal simulation of dissimilar fusion welding system is demonstrated by considering the phase lag effects in ultra-short pulse laser source. When the pulse duration is comparable with the electron relaxation time, the hyperbolic effect cannot be neglected in heat transfer analysis due to femtosecond laser. The non-Fourier effect is considered for heat transfer analysis assuming finite delay in development of temperature within the body. This delay is represented in terms of relaxation times connected to heat flux and temperature gradient. In the present work, the simulation
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Du, Hao, S. Jack Hu, Pei-Chung Wang, and Jingjing Li. "Estimation of Weld Bead Geometry in Gas Metal Arc Welding of Aluminum Using Electrical Signals and Liquid Surface Model." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9370.

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While gas metal arc welding of aluminum has been widely implemented in automotive industry, it is prone to process disturbances. Therefore, an effective monitoring method is necessary to ensure the weld quality (e.g., weld bead height, width and penetration). In this study, an online method was developed to estimate the weld bead geometry using the combination of the real time welding signals, characteristics of weld bead geometry and a liquid surface model. The liquid surface model can represent the steady-state geometry of the weld pool with varying characteristics, such as volume, boundary
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Kumaresan, D., R. Krishnan Potti, and L. Muthu. "Thermo-Mechanical FE-Analysis of Heat Flow and Residual Stresses Distribution in Butt Welding." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93836.

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In most of the Aerospace industries, welding play a vital role in joining process. Many of the structures presently built in space rockets, deep diving submarines and very heavy containment vessels for nuclear reactors could not have been constructed without the proper application of welding technology. It is well known fact that during welding the metal at the welding zone gets melted and then solidifies, which accompanies shrinkage in all directions. Residual strain and stress distributions coming from shrinking are largely influenced by the configuration of the welding process, metallurgica
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Rao, P. Srinivasa, O. P. Gupta, and S. S. N. Murty. "A Study on the Weld Bead Characteristics in Pulsed Gas Metal Arc Welding With Rotating Arc." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51580.

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Pulsed Gas Metal Arc Welding is widely used in industries because of its high productivity. The bead geometry obtained in welding steel is far from ideal and needs to be improved. It is experimentally observed that the beads are either convex or the penetration is deep and narrow. Both these conditions are undesirable. Proper selection of pulse parameters can improve the wetting, but the penetration remains finger type penetration. An arc rotation mechanism is developed which can be adapted to any conventional GMA welding torch. The beads deposited with rotating arc are flat and the penetratio
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Wa¨rmefjord, Kristina, Rikard So¨derberg, and Lars Lindkvist. "Strategies for Optimization of Spot Welding Sequence With Respect to Geometrical Variation in Sheet Metal Assemblies." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38471.

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During the assembly process of sheet metal parts, a lot of factors affect the final geometrical quality. It is important to have knowledge about the characteristics of as many as possible of those factors, not only to be able to reduce their effect, but also to be able to include those factors in variation simulations. Those tolerance simulations are crucial tools in early stages in automotive industry in order to predict the outcome in critical dimensions and it is of course important to have as good accuracy as possible in the simulations. One of the factors affecting the final geometry is t
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Xiong, C. H., Y. Rong, R. P. Koganti, M. J. Zaluzek, and N. Wang. "Geometric Variation Prediction for Automotive Aluminum Welded Assemblies." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39417.

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Assembly error prediction is one of the key problems in quality control. The objective of this paper is to develop the statistical error analysis model for assembling, to derive measures of controlling the geometric variations in assembly with multiple assembly stations, and to provide a statistical tolerance prediction/distribution toolkit integrated with CAD system for responding quickly to market opportunities with reduced manufacturing costs and improved quality. First the homogeneous transformation is used to describe the location and orientation of assembly features, parts and other rela
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Zheng, Jinyang, Jianfeng Shi, and Weican Guo. "Development of Non-Destructive Test and Safety Assessment of Electrofusion Joints for Connecting Polyethylene Pipes." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25578.

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Polyethylene (PE) pipes are widely used in transporting natural gas since 1970s. However, there is still no method for safety assessment of PE pipes. This paper introduces our recent works in developing ultrasonic NDT equipment and research on safety assessment of electrofusion (EF) joints of PE pipes. According to geometrical characteristic and ultrasonic response, the defects in EF joints can be divided into four categories, i.e. lack of fusion, voids, wire dislocation, and cold welding. Cold welding, which is the most common and dangerous defects, was successfully detected by the developed
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Canfield, Stephen L., Josh Qualls, and Alexander Shibakov. "Kinematic and Dynamic Evaluation of Mobile Robots Performing Welding Tasks." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-35109.

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As mobile robotic systems advance, they become viable technologies for automating manufacturing processes in fields that traditionally have not seen much automation. Such fields include shipbuilding, windmill, tank, and pipeline construction. Some of the manufacturing tasks in these fields require process validation prior to use in the manufacturing process. One such example process is welding. However, there is a lack of industry standards for mechanized or robotic welding that can impede the introduction of mobile robotic welding systems in the market place. There is also a lack of generaliz
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Doumanidis, Charalabos, and Yong-Min Kwak. "Thermo-Geometrical Design Models for Solid Freeform Fabrication With Material Transfer." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/dfm-5720.

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Abstract In thermal solid freeform fabrication of layered products, simultaneous quality assurance of the part geometry and material structure requires concurrent design of the process conditions with the product features. For a heat transfer analysis yielding the material structure, an analytical, distributed-parameter quasi-linear thermal model is developed and tested in scan welding. This is based on Green’s field, identified in-process by infrared temperature sensing to reflect thermal nonlinearities. Similarly, a mass transfer model of the layer surface geometry is established on an analo
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Gandini, Ettore, Franco Agnesone, Federica Taricco, and Leonardo Arrighi. "Advances in Gas Turbine Blade Repair by Laser Welding." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-365.

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Industrial gas turbine components are subject, in the course of their operating life, to various kinds of damages, requiring repair processes during periodical overhauling operations. Blades, in particular, suffer from creep, corrosion, wear phenomena. The majority of blade damage is currently repaired by means of manual TIG welding, with a filler metal which is often different from the blade alloy. This leads to an inferior metallurgical and mechanical condition of the repaired area as compared to the base metal. Besides, the nickel superalloys of the blades are often subject to cracking duri
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