Relevant bibliographies by topics / Fusion welding defects

Contents

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

Academic literature on the topic 'Fusion welding defects'

Author: Grafiati
Published: 5 June 2025
Last updated: 2 August 2025

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Journal articles on the topic "Fusion welding defects"

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Zai, Le, and Xin Tong. "FusionWelding of High-Strength Low-Alloy Steel: A Mini- Review." SOJ Materials Science & Engineering 7, no. 1 (2019): 1–4. http://dx.doi.org/10.15226/sojmse.2019.00157.

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High-Strength Low-Alloy (HSLA) steel exhibits excellent tensile strength and ductility, and it also possesses good welding performance due to its low carbon equivalent. However, welding defects always inevitably appear during the fusion weldingof HSLA steel. In this paper, the previous investigations on the microstructure of the joined HSLA steel by different fusion welding processes arereviewed, and the mechanical properties of the fabricated joint are analyzed. Also, the practicability of different fusion welding processes on HSLA steel has been systematically analyzed. Finally, the prospect
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Li, Qiang, Qi Lu, Yingchun Chen, Junwei Su, and Jie Yang. "Effect of the ultrasonic phased array on defect detection of HDPE electro-fusion joint." Journal of Physics: Conference Series 2419, no. 1 (2023): 012070. http://dx.doi.org/10.1088/1742-6596/2419/1/012070.

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Abstract As a common welding method for polyethylene natural gas pipelines, electro-fusion welding has been widely used. However, defects are easy to occur in the fusion area during the welding. In this paper, high-density polyethylene (HDPE) pipes with different types of electric welding joint defects are processed, and the detection effect of the ultrasonic phased array on joint defects is explored. The results show that: Ultrasonic phased array detection technology is easy to operate and reliable. It can detect three common defects: inadequate socket, cold welding, and scratch of oxide scal
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Zhu, Xin Wei, Jin Ping Pan, and Lian Jiang Tan. "Microwave Scan Inspection of HDPE Piping Thermal Fusion Welds for Lack of Fusion Defect." Applied Mechanics and Materials 333-335 (July 2013): 1523–28. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.1523.

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In this paper, microwave scan inspection was employed to detect the lack of fusion defect existing in the thermal fusion welds of high-density polyethylene (HDPE) piping. The thermal fusion welds without defects were firstly inspected by microwave scan technique. The obtained microwave interference pattern and the scan image produced were taken as the evaluation standard. Then the thermal fusion welds containing lack of fusion defects obtained under different welding conditions were inspected, and the corresponding scan images were recorded. The problems occurring in the welding processes that
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Deyun, Liu, Li Yunyue, Zhao Mingyuan, Sheng Lanbing, and Shen Yuanxun. "Research on typical defects of Cu/Fe dissimilar metals vacuum welding-brazing and improvement measures." Journal of Physics: Conference Series 2959, no. 1 (2025): 012010. https://doi.org/10.1088/1742-6596/2959/1/012010.

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Abstract Cu/Fe dissimilar metals are joined by welding-brazing in a vacuum furnace, and then typical defect formation mechanisms of the post-welded joints are observed and analyzed. As a result, it has been found that the major welding-brazing defects are elemental segregation, solidification cracks and poor fusion. It is worth noting that the causes of element segregation and slag inclusion are related to high welding-brazing temperature, impurity of raw materials, inadequate cleaning of materials before welding-brazing and volatilization of impurity metals in the chamber of the vacuum furnac
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Li, Qiang, Yingchun Chen, Yu Tang, and Hongyan Liu. "Ultrasonic phased array detection method for butt fusion welding defects of HDPE pipes." Journal of Physics: Conference Series 2419, no. 1 (2023): 012071. http://dx.doi.org/10.1088/1742-6596/2419/1/012071.

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Abstract The welding joint is the weak link of the high-density polyethylene pipeline. The continuous development of ultrasonic phased array technology is expected to replace traditional non-destructive testing methods. In this paper, ultrasonic phased array technology is used to detect the defects of butt fusion welding. The results show that the ultrasonic phased array can distinguish between metallic and non-metallic inclusions, and the inclusion size can be displayed. Besides, insufficient fusion defects have no obvious defect features in the sector scan results. The types of insufficient
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Lai, Huansheng, Dengshuai Fan, and Kanglin Liu. "The Effect of Welding Defects on the Long-Term Performance of HDPE Pipes." Polymers 14, no. 19 (2022): 3936. http://dx.doi.org/10.3390/polym14193936.

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High-density polyethylene (HDPE) pipes are the preferred pipes of water systems in nuclear power plants because they are durable, corrosion-free, easy to install, and not subject to fouling. However, their long-term performance can be affected by welding defects. In this paper, the effect of welding defects on the long-term performance of HDPE pipe butt fusion joints was studied using a creep test. A welding defect with a hole or inclusion in the joint was simulated by artificially inserting a copper ball during butt fusion welding. The test results showed that the creep life of the joint decr
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Widyawati, Fauzi, and Lino Marano. "IDENTIFIKASI CACAT LASAN FCAW PADA FONDASI MESIN KAPAL MENGGUNAKAN METODE ULTRASONIC TESTING." Jurnal TAMBORA 5, no. 2 (2021): 53–58. http://dx.doi.org/10.36761/jt.v5i2.1124.

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Ultrasonic testing is one of the non-destructive inspection methods for welding results. The ultrasonic testing method has several advantages, namely it can be used to analyze the position of the defect in the object, both the depth of the defect and the dimensions of the defect, and it is an environmentally friendly method. Physical defects that are in solid objects of course cannot be known from direct vision so it is necessary to carry out an inspection of an object to see whether or not there are defects that occur in solid objects. Ultrasonic testing of the results of FCAW welding on the
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Li, Qiang, Weihan Li, Yanfeng Li, and Jie Yang. "Study on X-ray testing of buried polyethylene pipeline thermal fusion welding." Journal of Physics: Conference Series 2419, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1742-6596/2419/1/012020.

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Abstract Thermal fusion welding is a common method for high-density polyethylene (HDPE) pipelines. However, defects are easy to occur at the joints in the welding process, causing hidden danger. In this study, HDPE pipes with thermal fusion welding defects were made and the X-ray technology was used for detection. The results show that the testing effects of different defects are quite different. The X-ray cannot detect cold-welding defects. The weld seam of the over-welding in the negative is narrowed. Besides, the unfilled holes collapse during welding, resulting in poor detection results. T
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Yan, Chen, Die Yang, Laihui Han, Zhonggang Zhao, Zengzhen Li, and Yongli Sui. "Influence of multi-process parameter linkage on the formation of lack of fusion defects based on SYSWLED simulation analysis." Journal of Physics: Conference Series 2842, no. 1 (2024): 012087. http://dx.doi.org/10.1088/1742-6596/2842/1/012087.

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Abstract The lack of fusion defects remains a significant challenge in narrow-gap automatic welding of pipeline circumferential joints and then becomes the primary factor affecting pipeline longevity. The influence of multi-process parameter linkage on the welding temperature field and formation of lack of fusion defects was investigated based on orthogonal experiments and SYSWELD finite element simulation. The results indicated that welding current and speed had the most significant influence on the welding temperature field. At the same time, oscillation width affected the ability to obtain
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Shaloo, Masoud, Martin Schnall, Thomas Klein, Norbert Huber, and Bernhard Reitinger. "A Review of Non-Destructive Testing (NDT) Techniques for Defect Detection: Application to Fusion Welding and Future Wire Arc Additive Manufacturing Processes." Materials 15, no. 10 (2022): 3697. http://dx.doi.org/10.3390/ma15103697.

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In Wire and Arc Additive Manufacturing (WAAM) and fusion welding, various defects such as porosity, cracks, deformation and lack of fusion can occur during the fabrication process. These have a strong impact on the mechanical properties and can also lead to failure of the manufactured parts during service. These defects can be recognized using non-destructive testing (NDT) methods so that the examined workpiece is not harmed. This paper provides a comprehensive overview of various NDT techniques for WAAM and fusion welding, including laser-ultrasonic, acoustic emission with an airborne optical
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Dissertations / Theses on the topic "Fusion welding defects"

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Zareie, Rajani Hamid Reza. "Development of a three-dimensional multi-scale model to study the formation of solidification defects in fusion welding." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57601.

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One of the long-standing challenges in joining of aluminum alloys is the occurrence of solidification defects, i.e. hot cracking and porosity, since these defects significantly increase manufacturing costs. This research project investigates the formation of solidification defects through development of a novel and comprehensive 3-D multi-scale and multi-physics numerical study and then application to the GTA welding of the aluminum alloy AA6061. The developed multi-scale model is composed of four different modules: 1) Solidification, 2) Deformation, 3) Fluid flow, and 4) Defect formation. Th
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Li, Peigang. "Cold lap formation in Gas Metal Arc Welding of steel : An experimental study of micro-lack of fusion defects." Doctoral thesis, Högskolan Väst, Avd för maskinteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-5596.

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Cold laps are defined as micro-lack of fusion defects at the weld toe more or less parallel to the surface of the parent plate. These defects are known to negatively influence the fatigue properties of weldments. Previous studies suggest that cold lap formation can not be avoided completely in Gas Metal Arc Welding (GMAW). Therefore, a better understanding of formation mechanisms is imperative to be able to minimize the number and size of these defects. The main objective of this work has been to provide a more comprehensive understanding of cold laps, including categorising, characterisation
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Book chapters on the topic "Fusion welding defects"

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Cieslak, Michael J. "Cracking Phenomena Associated with Welding." In Weld Integrity and Performance. ASM International, 1997. http://dx.doi.org/10.31399/asm.tb.wip.t65930071.

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Abstract The formation of defects in materials that have been fusion welded is a major concern in the design of welded assemblies. This article describes four types of defects that, in particular, have been the focus of much attention because of the magnitude of their impact on product quality. Colloquially, these four defect types are known as hot cracks, heat-affected zone microfissures, cold cracks, and lamellar tearing.
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Wang, Guiyang. "Research on Defect Detection and Evaluation Method of Pressure Vessel Based on Intelligent Algorithm." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2025. https://doi.org/10.3233/faia250385.

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In order to solve the problem of high probability of accidents caused by weld defects in steel pressure vessels, the research on defect detection and evaluation method of pressure vessels based on intelligent algorithm is put forward. In this paper, the machine vision system and X-ray technology are used to obtain the weld image of steel pressure vessel and extract the weld area characteristics, and the weld defects are integrated into three categories: fusion welding, virtual welding and weld penetration. Based on the extraction results of weld area features, the defect features such as weld
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"Weld Solidification." In Weld Integrity and Performance. ASM International, 1997. http://dx.doi.org/10.31399/asm.tb.wip.t65930003.

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Abstract It is well established that solidification behavior in the fusion zone controls the size and shape of grains, the extent of segregation, and the distribution of inclusions and defects such as porosity and hot cracks. Since the properties and integrity of the weld metal depend on the solidification behavior and the resulting microstructural characteristics, understanding weld pool solidification behavior is essential. This article provides a general introduction of key welding variables including solidification of the weld metal or fusion zone and microstructure of the weld and heat-af
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Tukahirwa, Gilbert, and Catherine Wandera. "Influence of Process Parameters in Gas-Metal Arc Welding (GMAW) of Carbon Steels." In Welding - Materials, Fabrication Processes, and Industry 4.0 [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002730.

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Gas-metal arc welding (GMAW) is a widely used fusion joining process in industry known for its ability to create high-quality welds. However, the complex and nonlinear nature of GMAW process variables often leads to weld defects in certain situations. Various dynamic factors affect the GMAW process, including power source dynamics, metal transfer dynamics, arc and droplet dynamics, and weld pool dynamics, making precise control challenging. While achieving completely defect-free welds can be difficult, some welds may still meet industry standards for acceptable performance in specific applicat
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Sobih, Mohamed, and Zuhair Elseddig. "Electron Beam Welding of Aluminum Alloys." In Encyclopedia of Aluminum and Its Alloys. CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000300.

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Aluminum alloys are the subject of increasing interest in the automotive industry, as well as the aircraft industry, aiming to reduce the weight of components and also allowing a profit in term of energy saving. In assembly process, riveting has been widely used in the aircraft industry, whereas welding seems to be available in the car industry in the case of aluminum alloys. Nevertheless, conventional fusion welding can generate defects, such as gas porosity, oxide inclusions, solidification cracking (hot tearing), reduced strength in both the weld, and heat-affected zone (HAZ), which could l
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Perdomo, Jorge J., and Luis A. Ganhao. "Failures Related to Welding." In Analysis and Prevention of Component and Equipment Failures. ASM International, 2021. http://dx.doi.org/10.31399/asm.hb.v11a.a0006808.

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Abstract This article describes some of the welding discontinuities and flaws characterized by nondestructive examinations. It focuses on nondestructive inspection methods used in the welding industry. The sources of weld discontinuities and defects as they relate to service failures or rejection in new construction inspection are also discussed. The article discusses the types of base metal cracks and metallurgical weld cracking. The article discusses the processes involved in the analysis of in-service weld failures. It briefly reviews the general types of process-related discontinuities of
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R., Radha, Sreekanth D., Tushar Bohra, and Surya Bhan Pratap Singh. "Mechanical and Corrosion Behavior of Friction Stir Welded AA 6063 Alloy." In Handbook of Research on Advancements in the Processing, Characterization, and Application of Lightweight Materials. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7864-3.ch010.

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Friction stir welding (FSW) is considered to be the most significant development in solid state metal joining processes. This joining technique is energy efficient, environmentally friendly, and versatile. In particular, it can be used to join high-strength aerospace aluminum alloys and other metallic alloys that are hard to weld by conventional fusion welding. The project aims to join Aluminum 6063 alloy plates by FSW and emphasize the (1) mechanisms responsible for the formation of welds without any defects, microstructural refinement, and (2) effects of FSW parameters on resultant microstru
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Nilsen, Morgan. "Anomaly Detection in Optical Monitoring of Laser Beam Welding." In Advances in Transdisciplinary Engineering. IOS Press, 2024. http://dx.doi.org/10.3233/atde240172.

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Robotized laser beam welding is one important process in manufacturing, offering efficient welding while minimizing the heat input. Nonetheless, this method is sensitive to various deviations, including fixture problems, heat-induced distortions, and inaccuracies in tool handling. Such deviations can lead to significant defects like lack of fusion, particularly when welding square butt joints without gaps. Detecting these defects through visual inspection or non-destructive methods is challenging. To address this, real-time monitoring and automatic intervention are necessary. One effective sen
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Zinke, Manuela, Stefan Burger, and Sven Juettner. "Properties of Additively Manufactured Deposits of Alloy 718 Using CMT Process Depending on Wire Batch and Shielding Gas." In Welding Principles and Application [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102455.

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Wire + arc additive manufacturing (WAAM®) is a versatile, low-cost, energy-efficient technology used in metal additive manufacturing (AM). This process uses arc welding to melt a wire and form a three-dimensional (3D) object using a layer-by-layer deposit. In the present study, the effect of heat input and shielding gas during CMT-WAAM welding on cooling time, mechanical properties at room temperature, and macro- and microstructure was investigated based on different part geometries (wall, block) using two S Ni 7718 wire batches. The heat input and consequently the cooling rate were varied by
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Yu, Xiaoqing, Hongen Wu, Yongquan Wang, and Jiangbing Qin. "Research on the Improved YOLOv5s Tube Sheet Weld Defect Detection Method." In Advances in Transdisciplinary Engineering. IOS Press, 2024. http://dx.doi.org/10.3233/atde240224.

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In the realm of machine learning-based target detection, there exist several challenges that require attention, namely limited detection range, complex feature extraction, suboptimal detection precision, and significant subjectivity. In this paper, the strengths and weaknesses of existing deep learning target detection algorithms have been investigated in order to address these issues by integrating the actual welding process of heat exchangers. The objective is to improve the model’s detection accuracy and speed. To achieve this, we employ the YOLOv5 model to detect and identify weld defects
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Conference papers on the topic "Fusion welding defects"

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Sokol, D. R., and C. M. Herndon. "Fusion Bonded Epoxy Coating Defects on Weld Centerline of Submerged-Arc Welded Pipe." In CORROSION 1990. NACE International, 1990. https://doi.org/10.5006/c1990-90243.

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Abstract The problem of weld centerline coating defects in fusion-bonded epoxy coatings has occurred on pipe produced in Europe, North America, and Asia. At various times, the defects have been attributed to coating application practices, powder manufacturing, pipe manufacturing, welding methods, and overly-critical inspectors. This paper details plant experience and experimental trials that led to the identification of the cause, and prove-up of solution. While welding microporosity was determined to be the source of the problem, various solutions can be implemented in either the pipe mill or
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Syahman, Shaik, Safian Sharif, Mohd Ahmad Zaharuddin Faridh, and Mokhtar Awang. "Non-Destructive Evaluation of Friction Stir Welded Thin Zn-Coated Metal Sheets with Lap-Joint Configuration." In International Conference on X-Rays and Related Techniques in Research and Industry 2023. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-sfc0u0.

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Friction stir welding (FSW) can be classified as a new non-fusion welding technique if compared to other conventional welding techniques. In this study, a thin Zn-coated metal sheet was welded using the FSW technique with a lap-joint configuration. The weld joint was inspected using non-destructive testing (NDT) methods to determine the quality of the weld produced. There are two main parameters used in the experiment, which are rotational speed [RPM] and traverse [mm/min]. The design of the welding experiment is carried out using the surface response technique with the circumscribe central co
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ul Haque, Ebad. "Microcracking of Fusion Bonded Epoxy a Rare Phenomenon." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00095.

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Abstract Designing robust corrosion protection system for the internals of pipeline in aggressive services is paramount for system integrity and business continuity. Fusion Bonded Epoxy (FBE) coatings are primarily utilized for corrosion protection on internals of pipelines. Pipes comes with shop applied quality assured internal FBE coating. On completion of onsite welding these joints are field coated to protect the internal cutback areas. This paper discusses a rare phenomenon of microcracking discovered on the FBE coated internal field joints. A thorough investigation was undertaken to disc
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Schultz, Robert A. H. "Proper Interior Weld Seam Preparation Prior to Lining Railcars." In CORROSION 1992. NACE International, 1992. https://doi.org/10.5006/c1992-92358.

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Abstract Welding procedures employed in the construction of railroad freight cars are very basic and set up to be used on a production line basis. There is no real preference made as to the quality or appearance of interior or exterior welds. All cars receive exterior painting of some type while only cars used for specialized loading have interior linings applied. This focuses on the four main methods of welding used today, gives a brief description of the type of weld produced and then a comparison or rating of these welds and what additional work is necessary to produce a surface which is eq
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Yadav, Vishal, Deepak Banerjee, Neha Sharma, and Vijay Singh. "Automated Welding Defect Recognition through Deep Learning Fusion: CNN and SVM Integration." In 2024 4th International Conference on Intelligent Technologies (CONIT). IEEE, 2024. http://dx.doi.org/10.1109/conit61985.2024.10627403.

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Mahajanam, Sudhakar, Efrain Garcia, and Ken Riggs. "Metallurgical Analysis of Hydrotested 20-Inch Natural Gas Pipeline." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16330.

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Abstract Hydrostatic testing of pipelines is critical during construction and maintenance. It is an important pre-commission test and destructive tool which validates the integrity of the pipeline prior to actual service with flammable fluids at high pressures. Hydrotesting provides the quality control needed to ensure that the required pipeline tensile strength is available to sustain the operating pressure, and that the welds and joints are defect free. In this paper, we discuss a recent case study wherein metallurgical analysis was performed at our lab on a 20-inch API 5L X65 carbon steel p
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Farzaneh, R., M. S. Safizadeh, M. Goodarzi, and M. Seyrafi. "Data Fusion of Non Destructive Testing for Detection of Defects in Welding." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24797.

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In this paper the specimens of Aluminum 2024 with 5 millimeter in thickness are joined together by friction stir welding with travel speed of 100 mm/min and tool rotational speeds of 450, 900 and 1800 rpm and a tool were made of hot working steel, H13, firstly. Thus three kinds of welds are produced. Radiography and ultrasonic (UT) non-destructive testing (NDT) procedure were applied to characterize the presence and geometry of possible weld defects prior to mechanical destructive testing. A Echograph Model 1090 digital UT instrumentation and a 4 MHz angle beam probe (refraction angle α = 70°)
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Zheng, Jinyang, Yongquan Qin, Jianfeng Shi, Weican Guo, Hui Wang, and Fei Wang. "Classification of Defects in Fusion Joints of Polyethylene Pipes." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25576.

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To establish a comprehensive classification method of the defects in fusion joints of polyethylene (PE) pipes, the geometrical characters of typical defects in electrofusion (EF) and butt fusion (BF) joints were researched by means of ultrasonic phased array inspection and naked-eye observation. Then the results were comparatively analyzed, and a novel classification method of the defects in PE pipe joints was proposed. Typical defects in EF joints were classified as lack of fusion, voids, wire dislocation, and cold welding. And those in BF joints were classified as crack, voids, inclusion on
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Dewan, Mohammad W., M. A. Wahab, and Ayman M. Okeil. "Effect of Weld Defects on Tensile Properties of Lightweight Materials and Correlations With Phased Array Ultrasonic Nondestructive Evaluation." In ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-3950.

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Fusion welding of Aluminum and its alloys is a great challenge for the structural integrity of lightweight material structures. One of the major shortcomings of Aluminum alloy welding is the inherent existence of defects in the welded area. In the current study, tests have been conducted on tungsten inert gas (TIG) welded AA6061-T651 aluminum alloy to determine the effects of defect sizes and its distribution on fracture strength. The information will be used to establish weld acceptance/rejection criteria. After welding, all specimens were non-destructively inspected with phased array ultraso
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Bird, C. R., and D. Kleiner. "The Phased Array Inspection of Friction Stir Welded Aluminium Plant." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51581.

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Friction stir welding (FSW) is a relatively new welding process compared to electron beam or arc welding. Unlike most other welding processes there is no liquid state for the weld pool. For this reason the potential defect types present within the weld are quite different from conventional welding defects such as voids or lack of fusion. These can still be present, but defects such as slag or hot tearing due weld pool shrinkage cannot. Other defects more akin to those associated with resistance welding (joint line remnants) are more likely and can be more serious. TWI has run and taken part in
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