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Hybrid Laser Arc Welding

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Hybrid Laser Arc Welding

Hybrid Laser Arc Welding Book
Author : F O Olsen
Publisher : Elsevier
Release : 2009-06-26
ISBN : 1845696522
Language : En, Es, Fr & De

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Book Description :

Hybrid laser-arc welding (HLAW) is a combination of laser welding with arc welding that overcomes many of the shortfalls of both processes. This important book gives a comprehensive account of hybrid laser-arc welding technology and applications. The first part of the book reviews the characteristics of the process, including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality. Part two discusses applications of the process to such metals as magnesium alloys, aluminium and steel as well as the use of hybrid laser-arc welding in such sectors as ship building and the automotive industry. With its distinguished editor and international team of contributors, Hybrid laser-arc welding is a valuable source of reference for all those using this important welding technology. Reviews arc and laser welding including both advantages and disadvantages of the hybrid laser-arc approach Explores the characteristics of the process including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality Examines applications of the process including magnesium alloys, aluminium and steel with specific focus on applications in the shipbuilding and automotive industries

Laser Arc Hybrid Welding of Thick Section Ni base Alloys Advanced Modeling and Experiments

Laser Arc Hybrid Welding of Thick Section Ni base Alloys   Advanced Modeling and Experiments Book
Author : Anonim
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Hybrid laser-arc welding of nickel-base alloys can increase productivity and decrease costs during construction and repair of critical components in nuclear power plants. However, laser and hybrid welding of nickel-base alloys is not well understood. This project sought to understand the physical processes during hybrid welding necessary to fabricate quality joints in Alloy 690, a Ni- Cr-Fe alloy. This document presents a summary of the data and results collected over the course of the project. The supporting documents are a collection of the research that has been or will be published in peer-reviewed journals along with a report from the partner at the national lab. Understanding the solidification behavior of Alloy 690 is important for knowing the final properties of the weldment. A study was undertaken to calculate the solidification parameters, such as temperature gradient, solidification rate, and cooling rate in Alloy 690 welds. With this information and measured cell and dendrite arm spacings, an Alloy 690 map was constructed to guide process parameter development and interpret fusion zones in later hybrid welds. This research is contained in "Solidification Map of a Nickel Base Alloy." The keyhole formed under high laser intensity gives the hybrid welding technique the greater penetration depths compared to arc welding. However, keyhole behavior can form defects in the material, so knowing transient keyhole characteristics is important. With international collaborators, a study was undertaken to validate a new process monitoring tool known as inline coherent imaging (ICI), which is able to measure the keyhole depth with spatial and temporal resolutions on the order of 10 microns and 10 microseconds. ICI was validated for five alloy systems, including Alloy 690. Additionally, the keyhole growth rates at the start of welding were measured with unprecedented accuracy. This research is contained in "Real Time Monitoring of Laser Beam Welding Keyhole Depth by Laser Interferometry." During full penetration welding of thick sections, root defects can form, which result in unacceptable weld quality. A study was undertaken to determine the competing forces in root defect formation by independently changing the weight forces and surface tension forces. The weight force was altered by changing the plate thickness, and the surface tension force was altered by changing the surface condition at the bottom surface. Root defects do depend on these two forces. This research is contained in "Mitigation of Root Defect in Laser and Hybrid Laser-Arc Welding." Validation of the hybrid laser-arc model is necessary to properly model heat and mass transfer and fluid flow in Alloy 690 hybrid welds. Therefore, the developed model was validated for low carbon steel. Temperatures calculated by the model were included into a microstructural model in order to calculate the phase fractions. Process maps were developed for the selection of welding parameters to avoid martensite formation. This research is contained in "Fusion Zone Microstructure in Full Penetration Laser-Arc Hybrid Welding of Low Alloy Steel." Alloy 690 suffers from ductility dip cracking, a form of hot cracking. This type of cracking inhibits the use of multipass welding to join Alloy 690. Our partners at ORNL performed some hot ductility testing with Alloy 690 samples using digital image correlation. The results of this work is contained in the report "Summary of 690 ductility dip cracking testing using Gleeble and digital image correlation." Macro-porosity is a limiting factor in the widespread deployment of laser and hybrid laser-arc welding for construction and repair of nuclear power plant components. Keyhole instability and fluctuation results in the formation of large bubbles, which become trapped at the advancing solid- liquid interface as pores. Laser and hybrid laser-arc welds were fabricated for a range of conditions. Porosity levels in the welds were measured in X-ray ...

Hybrid Laser Arc Welding of Ni base Alloy 690

Hybrid Laser Arc Welding of Ni base Alloy 690 Book
Author : Jared Jacob Blecher
Publisher : Unknown
Release : 2019
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The welding of Ni-base alloy Inconel 690 is commonly required during the construction and refurbishing of nuclear power plants with plate thicknesses varying between 1 mm to greater than 25 mm. However, during conventional multi-pass welding of Alloy 690 in this thickness range, micro-cracking in the form of ductility dip cracking (DDC) and solidification cracking can occur, causing significant delays in an already expensive industry. Hybrid laser-arc welding can significantly reduce the number of passes necessary to weld thick sections and, at the same time, lower the risk of forming DDC and solidification cracking. Significant advantages can be achieved by welding with laser and arc energy sources in close proximity. The high intensity laser forms a vapor cavity, or keyhole, leading to a large increase in weld depth, and welding speed is typically higher during laser welding. On the other hand, an arc creates a wide weld pool, which is useful for bridging gaps between plates, and can add material to the weld with a consumable electrode. However, hybrid laser-arc welding can lead to unique defects not found in conventional arc welding, including keyhole porosity and root defects. Porosity from keyhole instability and collapse can lead to very large bubbles (> 1 mm) becoming trapped as pores in the weld metal during partial penetration welds, while, during full penetration welds, weld metal can fall out of the weld and solidify as nuggets, a form of root defect. The solidification microstructure, root defect formation, keyhole porosity, and keyhole dynamics are studied in-depth using a combination of tools including a three dimensional heat transfer and fluid flow model, X-ray computed tomography, and inline coherent imaging. The results of this work produced a solidification map for Alloy 690, clarified the phenomena affecting root defect formation, developed hybrid welding solutions to keyhole porosity, and documented the keyhole growth rates during laser welding.

Processes and mechanisms of welding residual stress and distortion

Processes and mechanisms of welding residual stress and distortion Book
Author : Zhili Feng
Publisher : CRC Press
Release : 2005-11-01
ISBN : 9780849334672
Language : En, Es, Fr & De

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Book Description :

As a fabrication technology, welding presents a number of technical challenges to the designer, manufacturer, and end-user of the welded structures. Both weld residual stress and distortion can significantly impair the performance and reliability of the welded structures. They must be properly dealt with during design, fabrication, and in-service use of the welded structures. There have been many significant and exciting developments on the subject in the past ten to fifteen years. Measurement techniques have been improved significantly. More importantly, the development of computational welding mechanics methods has been phenomenal. The progresses in the last decade or so have not only greatly expanded our fundamental understanding of the processes and mechanisms of residual stress and distortion during welding, but also have provided powerful tools to quantitatively determine the detailed residual stress and distortion information for a given welded structure. New techniques for effective residual stress and distortion mitigations and controls have also been applied in different industry sectors. Processes and Mechanisms of Welding Residual Stress and Distortion provides a comprehensive summary on the developments in the subject. It outlines theoretical treatments on heat transfer, solid mechanics and materials behavior that are essential for understanding and determining the welding residual stress and distortion. The approaches for computational methods and analysis methodology are described so that non specialists can follow them. There are chapters devoted to the discussion of various techniques for control and mitigation of residual stress and distortion, and residual stress and distortion results for various typical welded structures are provided. The second half of the book looks at case studies and practical solutions and provides insights into the techniques, challenges, limitations and future trends of each application. This book will not only be useful for advanced analysis of the subject, but also provide sufficient examples and practical solutions for welding engineers. With a panel of leading experts this authoritative book will be a valuable resource for welding engineers and designers as well as academics working in the fields of structural and mechanical engineering.

Laser and Hybrid Laser Arc Welding

Laser and Hybrid Laser Arc Welding Book
Author : G. A. Turichin
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Laser and hybrid laser-arc welding are used at present in modern industry, having many advantages over traditional welding technology. Sectors such as the automotive industry, shipbuilding, aviation and space industry, chemical machinery, defense industry, and so on cannot be imagined without these technologies. Possibility of dramatic increase of weld joint properties, robustness, and high level of process automation makes the technology of laser and hybrid material processing a prospective part of the industry. At the same time, physical complexity of these processes, their cross-science nature, and necessity in high-level skilled stuff require many efforts for wide and successful industrial implementation. Present manuscript, devoted to discussion of physical peculiarity of laser and hybrid laser-arc welding of metals, approaches to physical-based design of technological equipment, as well as examples of industrial applications of laser and hybrid welding concerning the possibility to control welded metal structure and properties, is one of the steps on this way.

Welding and Joining of Aerospace Materials

Welding and Joining of Aerospace Materials Book
Author : M C Chaturvedi
Publisher : Elsevier
Release : 2011-12-19
ISBN : 0857095161
Language : En, Es, Fr & De

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Book Description :

Welding and joining techniques play an essential role in both the manufacture and in-service repair of aerospace structures and components, and these techniques become more advanced as new, complex materials are developed. Welding and joining of aerospace materials provides an in-depth review of different techniques for joining metallic and non-metallic aerospace materials. Part one opens with a chapter on recently developed welding techniques for aerospace materials. The next few chapters focus on different types of welding such as inertia friction, laser and hybrid laser-arc welding. The final chapter in part one discusses the important issue of heat affected zone cracking in welded superalloys. Part two covers other joining techniques, including chapters on riveting, composite-to-metal bonding, diffusion bonding and recent improvements in bonding metals. Part two concludes with a chapter focusing on the use of high-temperature brazing in aerospace engineering. Finally, an appendix to the book covers the important issue of linear friction welding. With its distinguished editor and international team of contributors, Welding and joining of aerospace materials is an essential reference for engineers and designers in the aerospace, materials and welding and joining industries, as well as companies and other organisations operating in these sectors and all those with an academic research interest in the subject. Provides an in-depth review of different techniques for joining metallic and non-metallic aerospace materials Discusses the important issue of heat affected zone cracking in welded superalloys Covers many joining techniques, including riveting, composite-to-metal bonding and diffusion bonding

Welding Processes

Welding Processes Book
Author : Radovan Kovacevic
Publisher : BoD – Books on Demand
Release : 2012-11-21
ISBN : 9535108549
Language : En, Es, Fr & De

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Book Description :

Despite the wide availability of literature on welding processes, a need exists to regularly update the engineering community on advancements in joining techniques of similar and dissimilar materials, in their numerical modeling, as well as in their sensing and control. In response to InTech's request to provide undergraduate and graduate students, welding engineers, and researchers with updates on recent achievements in welding, a group of 34 authors and co-authors from 14 countries representing five continents have joined to co-author this book on welding processes, free of charge to the reader. This book is divided into four sections: Laser Welding; Numerical Modeling of Welding Processes; Sensing of Welding Processes; and General Topics in Welding.

Hybrid Laser Arc Welding Process Design and Applications

Hybrid Laser Arc Welding Process Design and Applications Book
Author : Peter Grayson Kinney
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Hybrid Laser Arc Welding Process Design and Applications book written by Peter Grayson Kinney, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Trends In Welding Research

Trends In Welding Research Book
Author : Stan A. David
Publisher : ASM International
Release : 2006
ISBN : 1615031081
Language : En, Es, Fr & De

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Book Description :

Download Trends In Welding Research book written by Stan A. David, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Advanced Manufacturing Technologies

Advanced Manufacturing Technologies Book
Author : Kapil Gupta
Publisher : Springer
Release : 2017-04-29
ISBN : 3319560999
Language : En, Es, Fr & De

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Book Description :

This book provides details and collective information on working principle, process mechanism, salient features, and unique applications of various advanced manufacturing techniques and processes belong. The book is divided in three sessions covering modern machining methods, advanced repair and joining techniques and, finally, sustainable manufacturing. The latest trends and research aspects of those fields are highlighted.

Minimization of Welding Distortion and Buckling

Minimization of Welding Distortion and Buckling Book
Author : Pan Michaleris
Publisher : Elsevier
Release : 2011-05-25
ISBN : 0857092901
Language : En, Es, Fr & De

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Book Description :

Welding is a cost-effective and flexible method of fabricating large structures, but drawbacks such as residual stress, distortion and buckling must be overcome in order to optimize structural performance. Minimization of welding distortion and buckling provides a systematic overview of the methods of minimizing distortion and buckling in welded structures. Following an introductory chapter, part one focuses on understanding welding stress and distortion, with chapters on such topics as computational welding mechanics, modelling the effect of phase transformations on welding stress and distortion and using computationally efficient reduced-solution methods to understand welding distortion. Part two covers different methods of minimizing welding distortion. Chapters discuss methods such as differential heating for minimizing distortion in welded stiffeners, dynamic thermal tensioning, reverse-side heating and ways of minimizing buckling such as weld cooling and hybrid laser arc welding. With its distinguished editor and international team of contributors, Minimization of welding distortion and buckling is an essential reference for all welders and engineers involved in fabrication of metal end-products, as well as those in industry and academia with a research interest in the area. Provides a systematic overview of the methods of minimizing distortion and buckling in welded structures Focuses on understanding welding stress and distortion featuring computational welding mechanics and modelling the effect of phase transformations Explores different methods of minimizing welding distortion discussing differential heating and dynamic thermal tensioning

The Theory of Laser Materials Processing

The Theory of Laser Materials Processing Book
Author : John Dowden
Publisher : Springer Science & Business Media
Release : 2009-01-06
ISBN : 1402093403
Language : En, Es, Fr & De

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Book Description :

The purpose of this book is to show how general principles afford insight into laser processes. The principles may be from fundamental physical theory or from direct observation, but understanding of the general characteristics of a process is essential.

Handbook of Laser Welding Technologies

Handbook of Laser Welding Technologies Book
Author : S Katayama
Publisher : Elsevier
Release : 2013-06-30
ISBN : 0857098772
Language : En, Es, Fr & De

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Book Description :

Laser welding is a rapidly developing and versatile technology which has found increasing applications in industry and manufacturing. It allows the precision welding of small and hard-to-reach areas, and is particularly suitable for operation under computer or robotic control. The Handbook of laser welding technologies reviews the latest developments in the field and how they can be used across a variety of applications. Part one provides an introduction to the fundamentals of laser welding before moving on to explore developments in established technologies including CO2 laser welding, disk laser welding and laser micro welding technology. Part two highlights laser welding technologies for various materials including aluminium and titanium alloys, plastics and glass. Part three focuses on developments in emerging laser welding technologies with chapters on the applications of robotics in laser welding and developments in the modelling and simulation of laser and hybrid laser welding. Finally, part four explores the applications of laser welding in the automotive, railway and shipbuilding industries. The Handbook of laser welding technologies is a technical resource for researchers and engineers using laser welding technologies, professionals requiring an understanding of laser welding techniques and academics interested in the field. Provides an introduction to the fundamentals of laser welding including characteristics, welding defects and evolution of laser welding Discusses developments in a number of techniques including disk, conduction and laser micro welding Focusses on technologies for particular materials such as light metal alloys, plastics and glass

Welding and Joining of Advanced High Strength Steels AHSS

Welding and Joining of Advanced High Strength Steels  AHSS  Book
Author : Mahadev Shome,Muralidhar Tumuluru
Publisher : Elsevier
Release : 2015-02-25
ISBN : 0857098586
Language : En, Es, Fr & De

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Book Description :

Welding and Joining of Advanced High Strength Steels (AHSS): The Automotive Industry discusses the ways advanced high strength steels (AHSS) are key to weight reduction in sectors such as automotive engineering. It includes a discussion on how welding can alter the microstructure in the heat affected zone, producing either excessive hardening or softening, and how these local changes create potential weaknesses that can lead to failure. This text reviews the range of welding and other joining technologies for AHSS and how they can be best used to maximize the potential of AHSS. Reviews the properties and manufacturing techniques of advanced high strength steels (AHSS) Examines welding processes, performance, and fatigue in AHSS Focuses on AHSS welding and joining within the automotive industry

Development of a Comprehensive Process Model for Hybrid Laser Arc Welding

Development of a Comprehensive Process Model for Hybrid Laser Arc Welding Book
Author : Fanrong Kong,Radovan Kovacevic
Publisher : Unknown
Release : 2012
ISBN : 9789535108542
Language : En, Es, Fr & De

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Book Description :

Download Development of a Comprehensive Process Model for Hybrid Laser Arc Welding book written by Fanrong Kong,Radovan Kovacevic, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Hybrid Laser Arc Welding with High Power Diode Laser

Hybrid Laser Arc Welding with High Power Diode Laser Book
Author : Justino Bernardo Mulima
Publisher : Unknown
Release : 2008
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Hybrid Laser Arc Welding with High Power Diode Laser book written by Justino Bernardo Mulima, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Laser Welding

Laser Welding Book
Author : João Pedro Oliveira,Zhi Zeng
Publisher : MDPI
Release : 2020-05-13
ISBN : 303928861X
Language : En, Es, Fr & De

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Book Description :

Laser welding is a high-energy process used in a wide range of advanced materials to obtain micro- to macro-sized joints in both similar and dissimilar combinations. Moreover, this technique is widely used in several industries, such as automotive, aerospace, and medical industries, as well as in electrical devices. Although laser welding has been used for several decades, significant and exciting innovations often arise from both the process and/or advanced materials side.

Joining Technologies

Joining Technologies Book
Author : Mahadzir Ishak
Publisher : BoD – Books on Demand
Release : 2016-09-21
ISBN : 9535125966
Language : En, Es, Fr & De

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Book Description :

Joining and welding are two of the most important processes in manufacturing. These technologies have vastly improved and are now extensively used in numerous industries. This book covers a wide range of topics, from arc welding (GMAW and GTAW), FSW, laser and hybrid welding, and magnetic pulse welding on metal joining to the application of joining technologies for textile products. The analysis of temperature and phase transformation is also incorporated. This book also discusses the issue of dissimilar joint between metal and ceramic, as well as the technology of diffusion bonding.

Advances in Laser Materials Processing

Advances in Laser Materials Processing Book
Author : J. R. Lawrence
Publisher : Woodhead Publishing
Release : 2017-09-20
ISBN : 0081012535
Language : En, Es, Fr & De

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Book Description :

Advances in Laser Materials Processing: Technology, Research and Application, Second Edition, provides a revised, updated and expanded overview of the area, covering fundamental theory, technology and methods, traditional and emerging applications and potential future directions. The book begins with an overview of the technology and challenges to applying the technology in manufacturing. Parts Two thru Seven focus on essential techniques and process, including cutting, welding, annealing, hardening and peening, surface treatments, coating and materials deposition. The final part of the book considers the mathematical modeling and control of laser processes. Throughout, chapters review the scientific theory underpinning applications, offer full appraisals of the processes described and review potential future trends. A comprehensive practitioner guide and reference work explaining state-of-the-art laser processing technologies in manufacturing and other disciplines Explores challenges, potential, and future directions through the continuous development of new, application-specific lasers in materials processing Provides revised, expanded and updated coverage

Robotic Welding Intelligence and Automation

Robotic Welding  Intelligence and Automation Book
Author : Tzyh-Jong Tarn,Shan-Ben Chen,Xiao-Qi Chen
Publisher : Springer
Release : 2015-07-15
ISBN : 3319189972
Language : En, Es, Fr & De

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Book Description :

The primary aim of this volume is to provide researchers and engineers from both academic and industry with up-to-date coverage of new results in the field of robotic welding, intelligent systems and automation. The book is mainly based on papers selected from the 2014 International Conference on Robotic Welding, Intelligence and Automation (RWIA’2014), held Oct. 25-27, 2014, at Shanghai, China. The articles show that the intelligentized welding manufacturing (IWM) is becoming an inevitable trend with the intelligentized robotic welding as the key technology. The volume is divided into four logical parts: Intelligent Techniques for Robotic Welding, Sensing of Arc Welding Processing, Modeling and Intelligent Control of Welding Processing, as well as Intelligent Control and its Applications in Engineering.