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Residual Stresses in Friction Stir Welding

Residual Stresses in Friction Stir Welding
  • Author : Nilesh Kumar,Rajiv S. Mishra,John A. Baumann
  • Publisher :Unknown
  • Release Date :2013-11-20
  • Total pages :60
  • ISBN : 9780128007327
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Summary : This book describes the fundamentals of residual stresses in friction stir welding and reviews the data reported for various materials. Residual stresses produced during manufacturing processes lead to distortion of structures. It is critical to understand and mitigate residual stresses. From the onset of friction stir welding, claims have been made about the lower magnitude of residual stresses. The lower residual stresses are partly due to lower peak temperature and shorter time at temperature during friction stir welding. A review of residual stresses that result from the friction stir process and strategies to mitigate it have been presented. Friction stir welding can be combined with additional in-situ and ex-situ manufacturing steps to lower the final residual stresses. Modeling of residual stresses highlights the relationship between clamping constraint and development of distortion. For many applications, management of residual stresses can be critical for qualification of component/structure. Reviews magnitude of residual stresses in various metals and alloys Discusses mitigation strategies for residual stresses during friction stir welding Covers fundamental origin of residual stresses and distortion

Residual Stress in Friction Stir Welding and Laser-Assisted Friction Stir Welding by Numerical Simulation and Experiments

Residual Stress in Friction Stir Welding and Laser-Assisted Friction Stir Welding by Numerical Simulation and Experiments
  • Author : Caterina Casavola
  • Publisher :Unknown
  • Release Date :2018
  • Total pages :229
  • ISBN : OCLC:1154245984
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Summary : The friction stir welding (FSW) has become an important welding technique to join materials that are difficult to weld by traditional fusion welding technology. In this technique, the material is not led to fusion, and the joint is the result of the rotation and movement along the welding line of the tool that causes softening of material due to frictional heat and the stirring of the same. In FSW, the temperature does not reach the fusion value of the materials, and this helps to decrease the residual stress values. However, due to the higher force involved in the weld and, thus, the rigid clamping used, the residual stresses are not low in general in this technique. As the presence of high residual stress values influences the post-weld mechanical properties, e.g. fatigue properties, it is important to investigate the residual stress distribution in the FSW welds. In this chapter, two numerical models that predict temperatures and residual stresses in friction stir welding and laser-assisted friction stir welding will be described. Experimental measurements of temperatures and residual stress will be carried out to validate the prediction of the models.

Residual Stresses in Friction Stir Welding

Residual Stresses in Friction Stir Welding
  • Author : Nilesh Kumar,Rajiv S. Mishra,John A. Baumann
  • Publisher :Unknown
  • Release Date :2013-11-21
  • Total pages :60
  • ISBN : 012800150X
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Summary : This book describes the fundamentals of residual stresses in friction stir welding and reviews the data reported for various materials. Residual stresses produced during manufacturing processes lead to distortion of structures. It is critical to understand and mitigate residual stresses. From the onset of friction stir welding, claims have been made about the lower magnitude of residual stresses. The lower residual stresses are partly due to lower peak temperature and shorter time at temperature during friction stir welding. A review of residual stresses that result from the friction stir process and strategies to mitigate it have been presented. Friction stir welding can be combined with additional in-situ and ex-situ manufacturing steps to lower the final residual stresses. Modeling of residual stresses highlights the relationship between clamping constraint and development of distortion. For many applications, management of residual stresses can be critical for qualification of component/structure. Reviews magnitude of residual stresses in various metals and alloys Discusses mitigation strategies for residual stresses during friction stir welding Covers fundamental origin of residual stresses and distortion

Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments

Residual Stress Analysis on Welded Joints by Means of Numerical Simulation and Experiments
  • Author : Paolo Ferro,Filippo Berto
  • Publisher :Unknown
  • Release Date :2018-05-16
  • Total pages :162
  • ISBN : 9781789231069
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Summary : The ability to quantify residual stresses induced by welding processes through experimentation or numerical simulation has become, today more than ever, of strategic importance in the context of their application to advanced design. This is an ongoing challenge that commenced many years ago. Recent design criteria endeavour to quantify the effect of residual stresses on fatigue strength of welded joints to allow a more efficient use of materials and a greater reliability of welded structures. The aim of the present book is contributing to these aspects of design through a collection of case-studies that illustrate both standard and advanced experimental and numerical methodologies used to assess the residual stress field in welded joints. The work is intended to be of assistance to designers, industrial engineers and academics who want to deepen their knowledge of this challenging topic.

Friction Stir Welding and Processing X

Friction Stir Welding and Processing X
  • Author : Yuri Hovanski,Rajiv Mishra,Yutaka Sato,Piyush Upadhyay,David Yan
  • Publisher :Unknown
  • Release Date :2019-02-11
  • Total pages :283
  • ISBN : 9783030057527
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Summary : This book is a compilation of the recent progress on friction stir technologies including high-temperature applications, industrial applications, dissimilar alloy/materials, lightweight alloys, simulation, control, characterization, and derivative technologies. The volume offers a current look at friction stir welding technology from application to characterization and from modeling to R&D. Contributions document advances in application, controls, and simulation of the friction stir process to aid researchers in seeing the current state-of-the-art.

Friction Stir Welding

Friction Stir Welding
  • Author : Daniela Lohwasser,Zhan Chen
  • Publisher :Unknown
  • Release Date :2009-12-18
  • Total pages :436
  • ISBN : 9781845697716
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Summary : Friction stir welding (FSW) is a highly important and recently developed joining technology that produces a solid phase bond. It uses a rotating tool to generate frictional heat that causes material of the components to be welded to soften without reaching the melting point and allows the tool to move along the weld line. Plasticized material is transferred from the leading edge to trailing edge of the tool probe, leaving a solid phase bond between the two parts. Friction stir welding: from basics to applications reviews the fundamentals of the process and how it is used in industrial applications. Part one discusses general issues with chapters on topics such as basic process overview, material deformation and joint formation in friction stir welding, inspection and quality control and friction stir welding equipment requirements and machinery descriptions as well as industrial applications of friction stir welding. A chapter giving an outlook on the future of friction stir welding is included in Part one. Part two reviews the variables in friction stir welding including residual stresses in friction stir welding, effects and defects of friction stir welds, modelling thermal properties in friction stir welding and metallurgy and weld performance. With its distinguished editors and international team of contributors, Friction stir welding: from basics to applications is a standard reference for mechanical, welding and materials engineers in the aerospace, automotive, railway, shipbuilding, nuclear and other metal fabrication industries, particularly those that use aluminium alloys. Provides essential information on topics such as basic process overview, materials deformation and joint formation in friction stir welding Inspection and quality control and friction stir welding equipment requirements are discussed as well as industrial applications of friction stir welding Reviews the variables involved in friction stir welding including residual stresses, effects and defects of friction stir welds, modelling thermal properties, metallurgy and weld performance

Current Trends in Friction Stir Welding (FSW) and Friction Stir Spot Welding (FSSW)

Current Trends in Friction Stir Welding (FSW) and Friction Stir Spot Welding (FSSW)
  • Author : Mukuna Patrick Mubiayi,Esther Titilayo Akinlabi,Mamookho Elizabeth Makhatha
  • Publisher :Unknown
  • Release Date :2018-08-09
  • Total pages :206
  • ISBN : 9783319927503
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Summary : This book provides an overview of friction stir welding and friction stir spot welding with a focus on aluminium to aluminium and aluminium to copper. It also discusses experimental results for friction stir spot welding between aluminium and copper, offering a good foundation for researchers wishing to conduct more investigations on FSSW Al/Cu. Presenting full methodologies for manufacturing and case studies on FSSW Al/Cu, which can be duplicated and used for industrial purposes, it also provides a starting point for researchers and experts in the field to investigate the FSSW process in detail. A variant of the friction stir welding process (FSW), friction stir spot welding (FSSW) is a relatively new joining technique and has been used in a variety of sectors, such as the automotive and aerospace industries. The book describes the microstructural evolution, chemical and mechanical properties of FSW and FSSW, including a number of case studies.

Influence of the Clamps Configuration on Residual Stresses Field in Friction Stir Welding Process

Influence of the Clamps Configuration on Residual Stresses Field in Friction Stir Welding Process
  • Author : Anonim
  • Publisher :Unknown
  • Release Date :2015
  • Total pages :229
  • ISBN : OCLC:1052079556
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Summary : Friction stir welding is a joining process developed in 1991 by The Welding Institute. This welding technique is a solid-state joining process leading to joints with good mechanical performance and low residual stresses. In all welding techniques, the clamping systems have an important role in determining the quality of the welds and mechanical characteristics. Even more in friction stir welding, the position of the clamps plays a critical role because it is mainly a mechanical process with high forces involved. In this article, the correlation between the residual stress field and configurations of clamps has been established numerically. For this purpose an uncoupled thermo-mechanical finite element analysis has been carried out. The mechanical loads due to the tool have been also implemented into the model. The thermal and mechanical models have been validated on temperature field recorded by an infrared camera and residual stress field measured by X-ray diffraction analysis. The friction stir welding test was conducted on 6-mm-thick 5754 H111 aluminium alloy plates.

Friction Stir Welding and Processing

Friction Stir Welding and Processing
  • Author : Rajiv Sharan Mishra,Partha Sarathi De,Nilesh Kumar
  • Publisher :Unknown
  • Release Date :2014-08-04
  • Total pages :338
  • ISBN : 9783319070438
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Summary : This book lays out the fundamentals of friction stir welding and processing and builds toward practical perspectives. The authors describe the links between the thermo-mechanical aspects and the microstructural evolution and use of these for the development of the friction stir process as a broader metallurgical tool for microstructural modification and manufacturing. The fundamentals behind the practical aspects of tool design, process parameter selection and weld related defects are discussed. Local microstructural refinement has enabled new concepts of superplastic forming and enhanced low temperature forming. The collection of friction stir based technologies is a versatile set of solid state manufacturing tools.

Residual Stress Measurements

Residual Stress Measurements
  • Author : American Society for Metals,R. G. Treuting
  • Publisher :Unknown
  • Release Date :1952
  • Total pages :210
  • ISBN : WISC:89061423059
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Summary :

Friction Stir Welding and Processing

Friction Stir Welding and Processing
  • Author : Rajiv Sharan Mishra,Partha Sarathi De,Nilesh Kumar
  • Publisher :Unknown
  • Release Date :2014-08-04
  • Total pages :338
  • ISBN : 9783319070438
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Summary : This book lays out the fundamentals of friction stir welding and processing and builds toward practical perspectives. The authors describe the links between the thermo-mechanical aspects and the microstructural evolution and use of these for the development of the friction stir process as a broader metallurgical tool for microstructural modification and manufacturing. The fundamentals behind the practical aspects of tool design, process parameter selection and weld related defects are discussed. Local microstructural refinement has enabled new concepts of superplastic forming and enhanced low temperature forming. The collection of friction stir based technologies is a versatile set of solid state manufacturing tools.

Advances in Friction-Stir Welding and Processing

Advances in Friction-Stir Welding and Processing
  • Author : M.-K. Besharati-Givi,P. Asadi
  • Publisher :Unknown
  • Release Date :2014-12-08
  • Total pages :796
  • ISBN : 9780857094551
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Summary : Friction-stir welding (FSW) is a solid-state joining process primarily used on aluminum, and is also widely used for joining dissimilar metals such as aluminum, magnesium, copper and ferrous alloys. Recently, a friction-stir processing (FSP) technique based on FSW has been used for microstructural modifications, the homogenized and refined microstructure along with the reduced porosity resulting in improved mechanical properties. Advances in friction-stir welding and processing deals with the processes involved in different metals and polymers, including their microstructural and mechanical properties, wear and corrosion behavior, heat flow, and simulation. The book is structured into ten chapters, covering applications of the technology; tool and welding design; material and heat flow; microstructural evolution; mechanical properties; corrosion behavior and wear properties. Later chapters cover mechanical alloying and FSP as a welding and casting repair technique; optimization and simulation of artificial neural networks; and FSW and FSP of polymers. Provides studies of the microstructural, mechanical, corrosion and wear properties of friction-stir welded and processed materials Considers heat generation, heat flow and material flow Covers simulation of FSW/FSP and use of artificial neural network in FSW/FSP

Friction Stir Welding of Dissimilar Alloys and Materials

Friction Stir Welding of Dissimilar Alloys and Materials
  • Author : Nilesh Kumar,Rajiv S. Mishra,Wei Yuan
  • Publisher :Unknown
  • Release Date :2015-03-05
  • Total pages :134
  • ISBN : 9780128026212
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Summary : This book will summarize research work carried out so far on dissimilar metallic material welding using friction stir welding (FSW). Joining of dissimilar alloys and materials are needed in many engineering systems and is considered quite challenging. Research in this area has shown significant benefit in terms of ease of processing, material mixing, and superior mechanical properties such as joint efficiencies. A summary of these results will be discussed along with potential guidelines for designers. Explains solid phase process and distortion of work piece Addresses dimensional stability and repeatability Addresses joint strength Covers metallurgical properties in the joint area Covers fine microstructure Introduces improved materials use (e.g., joining different thicknesses) Covers decreased fuel consumption in light weight aircraft Addresses automotive and ship applications

Friction Stir Welding of High Strength 7XXX Aluminum Alloys

Friction Stir Welding of High Strength 7XXX Aluminum Alloys
  • Author : Rajiv S. Mishra,Mageshwari Komarasamy
  • Publisher :Unknown
  • Release Date :2016-06-08
  • Total pages :120
  • ISBN : 9780128094600
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Summary : Friction Stir Welding of High Strength 7XXX Aluminum Alloys is the latest edition in the Friction Stir series and summarizes the research and application of friction stir welding to high strength 7XXX series alloys, exploring the past and current developments in the field. Friction stir welding has demonstrated significant benefits in terms of its potential to reduce cost and increase manufacturing efficiency of industrial products in transportation, particularly the aerospace sector. The 7XXX series aluminum alloys are the premium aluminum alloys used in aerospace. These alloys are typically not weldable by fusion techniques and considerable effort has been expended to develop friction stir welding parameters. Research in this area has shown significant benefit in terms of joint efficiency and fatigue performance as a result of friction stir welding. The book summarizes those results and includes discussion of the potential future directions for further optimization. Offers comprehensive coverage of friction stir welding of 7XXX series alloys Discusses the physical metallurgy of the alloys Includes physical metallurgy based guidelines for obtaining high joint efficiency Summarizes the research and application of friction stir welding to high strength 7XXX series alloys, exploring the past and current developments in the field

Joining Technologies

Joining Technologies
  • Author : Mahadzir Ishak
  • Publisher :Unknown
  • Release Date :2016-09-21
  • Total pages :284
  • ISBN : 9789535125969
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Summary : 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.

Mechanics of Materials in Modern Manufacturing Methods and Processing Techniques

Mechanics of Materials in Modern Manufacturing Methods and Processing Techniques
  • Author : Vadim V. Silberschmidt
  • Publisher :Unknown
  • Release Date :2020-04-03
  • Total pages :465
  • ISBN : 9780128182338
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Summary : Mechanics of Materials in Modern Manufacturing Methods and Processing Techniques provides a detailed overview of the latest developments in the mechanics of modern metal forming manufacturing. Focused on mechanics as opposed to process, it looks at the mechanical behavior of materials exposed to loading and environmental conditions related to modern manufacturing processes, covering deformation as well as damage and fracture processes. The book progresses from forming to machining and surface-treatment processes, and concludes with a series of chapters looking at recent and emerging technologies. Other topics covered include simulations in autofrettage processes, modeling strategies related to cutting simulations, residual stress caused by high thermomechanical gradients and pultrusion, as well as the mechanics of the curing process, forging, and cold spraying, among others. Some non-metallic materials, such as ceramics and composites, are covered as well. Synthesizes the latest research in the mechanics of modern metal forming processes Suggests theoretical models and numerical codes to predict mechanical responses Covers mechanics of shot peening, pultrusion, hydroforming, magnetic pulse forming Considers applicability of different materials and processes for optimum performance

Friction Stir Welding and Processing IX

Friction Stir Welding and Processing IX
  • Author : Yuri Hovanski,Rajiv Mishra,Yutaka Sato,Piyush Upadhyay,David Yan
  • Publisher :Unknown
  • Release Date :2017-02-06
  • Total pages :324
  • ISBN : 9783319523835
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Summary : This books presents a current look at friction stir welding technology from application to characterization and from modeling to R&D. It is a compilation of the recent progress relating to friction stir technologies including derivative technologies, high-temperature applications, industrial applications, dissimilar alloy/materials, lightweight alloys, simulation, and characterization. With contributions from leaders and experts in industry and academia, this will be a comprehensive source for the field of Friction Stir Welding and Processing.

Optimization in Friction Stir Welding

Optimization in Friction Stir Welding
  • Author : Cem Celal Tutum
  • Publisher :Unknown
  • Release Date :2011-02
  • Total pages :232
  • ISBN : 3843394989
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Summary : This book deals with the challenging multidisciplinary task of combining variant thermal and thermo-mechanical simulations for the manufacturing process of friction stir welding (FSW) with numerical optimization techniques in the search for optimal process parameters. The FSW process is characterized by multiphysics involving solid material flow, heat transfer, thermal softening, recrystallization and the formation of residual stresses. Initially, the thermal models were addressed since they in essence constitute the basis of all other models of FSW. Following this, several integrated thermo-mechanical models of the process were developed to simulate temperature and stress evolution during welding and subsequent cooling, i.e. eventually leading to the residual stress state and reduced mechanical properties, as well as to predict the final weld's load carrying capacity. These models were finally combined with classical single-objective and evolutionary multi-objective optimization algorithms (i.e. SQP and NSGA-II), to find the optimum process parameters (heat input, rotational and traverse welding speeds) that would result in favorable thermo-mechanical conditions for the process.

Residual Stresses VII, ECRS7

Residual Stresses VII, ECRS7
  • Author : W. Reimers,S. Quander
  • Publisher :Unknown
  • Release Date :2006-09-15
  • Total pages :1000
  • ISBN : 9783038130499
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Summary : Volume is indexed by Thomson Reuters CPCI-S (WoS). The Seventh European Conference on Residual Stresses (ECRS7), was held in Berlin, Germany, on the 13-15th September 2006.

Heat Effects of Welding

Heat Effects of Welding
  • Author : Dieter Radaj
  • Publisher :Unknown
  • Release Date :2012-12-06
  • Total pages :348
  • ISBN : 9783642486401
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Summary : Almost all welding technology depends upon the use of concentrated energy sources to fuse or soften the material locally at the joint, before such energy can be diffused or dispersed elsewhere. Although comprehensive treatments of transient heat flow as a controlling influence have been developed progressively and published over the past forty years, the task of uniting the results compactly within a textbook has become increasingly formidable. With the comparative scarcity of such works, welding engineers have been denied the full use of powerful design analysis tools. During the past decade Dr Radaj has prepared to fulfil this need, working from a rich experience as pioneer researcher and teacher, co-operator with Professor Argyris at Stuttgart University in developing the finite element method for stress analysis of aircraft and power plant structures, and more recently as expert consultant on these and automotive structures at Daimler Benz. His book appeared in 1988 in the German language, and this updated English language edition will significantly increase the availability of the work.

Residual Stresses 2018

Residual Stresses 2018
  • Author : Marc Seefeldt
  • Publisher :Unknown
  • Release Date :2018-10-10
  • Total pages :310
  • ISBN : 9781945291890
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Summary : The European Conference on Residual Stresses (ECRS) series is the leading European forum for scientific exchange on internal and residual stresses in materials. It addresses both academic and industrial experts and covers a broad gamut of stress-related topics from instrumentation via experimental and modelling methodology up to stress problems in specific processes such as welding or shot-peening, and their impact on materials properties. Chapters: Diffraction Methods; Mechanical Relaxation Methods; Acoustic and Electromagnetic Methods; Composites, Nano and Microstructures; Films, Coatings and Oxides; Cold Working and Machining; Heat Treatments and Phase Transformations; Welding, Fatigue and Fracture: Stresses in Additive Manufacturing.