Investigation Of Weld Material And Process Parameter Influence On Forge Force In Friction Stir Welding

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Investigation Of Weld Material And Process Parameter Influence On Forge Force In Friction Stir Welding

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Author : Edward G. Cole
language : en
Publisher:
Release Date : 2009

Investigation Of Weld Material And Process Parameter Influence On Forge Force In Friction Stir Welding written by Edward G. Cole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

Friction Stir Welding And Processing Vi

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Author : Rajiv S. Mishra
language : en
Publisher: John Wiley & Sons
Release Date : 2011-04-12

Friction Stir Welding And Processing Vi written by Rajiv S. Mishra and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-12 with Technology & Engineering categories.

Friction stir welding has seen significant growth in both technology implementation and scientific exploration. This book covers all aspects of friction stir welding and processing, from fundamentals to design and applications. It also includes an update on the current research issues in the field of friction stir welding and a guide for further research.

Advanced Joining Processes

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Author : Lucas F. M. da Silva
language : en
Publisher: Springer Nature
Release Date : 2020-03-31

Advanced Joining Processes written by Lucas F. M. da Silva and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-31 with Science categories.

This book presents recent material science-based and mechanical analysis-based advances in joining processes. It includes all related processes, e.g. friction stir welding, joining by plastic deformation, laser welding, clinch joining, and adhesive bonding, as well as hybrid joints. It gathers selected full-length papers from the 1st Conference on Advanced Joining Processes.

The Control Of Friction Stir Welding Plunge Force And Power And Energy Consumption Through The Variation Of Process Parameters

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Author : Bandar Abdullah Aloyaydi
language : en
Publisher:
Release Date : 2017

The Control Of Friction Stir Welding Plunge Force And Power And Energy Consumption Through The Variation Of Process Parameters written by Bandar Abdullah Aloyaydi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

The work in this thesis divided into two parts: the control of friction stir welding plunge force through the variation of the process parameters and temperature control. The second part is the power and energy consumption through the variation of process parameters. The first part of the thesis is to understand the variability of the plunge force during the traverse stage of friction stir welding. It was observed that the plunge force during the traverse stage of friction stir welding is not always stable and interestingly the plunge force profile shape is not repeatable. To explore the potential causes of this force variability, the pre-weld surface topography, pre-weld material hardness, surface grain structure and relative tool-workpiece displacement were taken into account. The friction stir welds were performed on CNC mill with position control mode. The welds were conducted by bead-on-plate of the 6061-T6 aluminum alloy. The results show that the post-weld surface topography shows a strong correlation with the plunge force during the traverse stage. Also, the results indicate that the material loss underneath the shoulder as flash leads to decrease in the plunge force. It is concluded that the flash should be eliminated during the welding to ensure that a stable plunge force is achieved. The second part of the thesis investigates the influence of the friction stir weld process parameters (tool rotation and traverse speed) on the power and specific weld energy consumption of butt welded 5083-T116 aluminum alloy. To ensure the welding quality, the tensile stress and the elongation of the welds are experimentally measured across all the process parameters. The results show that the weld strength becomes weaker when the traverse speed increased above 400 mm/min while the weld strength and elongation improved at as the traverse speed decreased. However, the results show that the minimum power consumption can be achieved when the speed parameters are slow while the minimum weld energy consumption can be achieved at higher traverse speed.

Friction Stir Welding And Processing In Alloy Manufacturing

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Author : Carlos Agelet de Saracibar
language : en
Publisher: MDPI
Release Date : 2019-08-02

Friction Stir Welding And Processing In Alloy Manufacturing written by Carlos Agelet de Saracibar and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-02 with Science categories.

This book is a printed edition of the Special Issue Friction Stir Welding and Processing in Alloy Manufacturingthat was published in Metals

The Impact Of Alloy And Tool Features On Friction Stir Welding Forces

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Author :
language : en
Publisher:
Release Date : 2013

The Impact Of Alloy And Tool Features On Friction Stir Welding Forces written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

This dissertation examines the magnitude and source of process forces measured during friction stir welding (FSW) of aluminum alloys and their ability to be influenced by tool design, welding parameters, and process setup. Because FSW forces are known inhibitors to process implementation, understanding the source(s) of the reactive forces in addition to developing methods to reduce welding forces is vital to increased industrial implementation. This work shows that welding forces are largely determined by the shear strength of the welded material, where plastic deformation occurs upon an occasional sticking-frictional condition at the tool-workpiece interface. This research also demonstrates the efficacy of tool design modifications that impact the extent of plastic deformation occurring within a single tool rotation. Common tool features at varying levels are empirically evaluated and statistically analyzed to form linear models for predicting weld force and spindle torque. Relationships are also defined for the resulting shear-layer thickness of the weld nugget, where influence of both tool features and measured forces are studied. The statistical models provide recommendations for both single-feature and full-tool designs for reducing required process forces and spindle torque. The impact of these models is such that practitioners can modify or develop FSW tools that allow less-rigid or lower-powered systems to produce friction stir welds. Moreover, the models also indirectly address the issue of tool wear in that modifications to reduce process forces and spindle torque are generally analogous to process temperature decreases, which are known to extend the life of frictions stir welding tools.

Computational Modeling Of The Friction Stir Welding Process Fsw And Of The Performance Of Fsw Joints

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Author : Ajay Prasad Arakere
language : en
Publisher:
Release Date : 2013

Computational Modeling Of The Friction Stir Welding Process Fsw And Of The Performance Of Fsw Joints written by Ajay Prasad Arakere and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

Abstract: Friction Stir Welding (FSW) is a solid-state metal-joining process. Within FSW, a (typically) cylindrical tool-pin (threaded at the bottom and terminated with a circular-plate shape shoulder, at the top) is driven between two firmly-clamped plates (placed on a rigid backing support). Due to a high normal downward pressure applied to the shoulder and due to frictional sliding and plastic-deformation, substantial amount of heat is generated at the tool/work-piece interface and in the region underneath the tool shoulder. Thermally plasticized work-piece material is then extruded around the traveling tool and forged into a welding-joint behind the tool. Due to its solid-state character and lower process temperatures, FSW possesses a number of advantages in comparison to the conventional fusion welding processes. In the present work, advanced computational methods and tools are used to investigate three specific aspects of the FSW process: (a) material flow and stirring/mixing: Within the numerical model of the FSW process, the FSW tool is treated as a Lagrangian component while the workpiece material is treated as a Eulerian component. The employed coupled Eulerian/Lagrangian computational analysis of the welding process was of a two-way thermo-mechanical character (i.e. frictional-sliding/plastic-work dissipation is taken to act as a heat source in the thermal-energy balance equation) while temperature is allowed to affect mechanical aspects of the model through temperature-dependent material properties. The workpiece material (AA5059, solid-solution strengthened and strain-hardened aluminum alloy) is represented using a modified version of the classical Johnson-Cook model (within which the strain-hardening term is augmented in order to take into account for the effect of dynamic recrystallization) while the FSW tool material (AISI H13 tool steel) is modeled as an isotropic linear-elastic material. Within the analysis, the effects of some of the FSW key process parameters are investigated (e.g. weld pitch, tool tilt-angle and the tool pin-size). The results pertaining to the material flow during FSW are compared with their experimental counterparts. It is found that, for the most part, experimentally observed material-flow characteristics are reproduced within the current FSW-process model; (b) modifications of the existing workpiece material models for use in FSW simulations: Johnson-Cook strength material model is frequently used in finite element analyses of various manufacturing processes involving plastic deformation of metallic materials. The main attraction to this model arises from its mathematical simplicity and its ability to capture the first order metal-working effects (e.g. those associated with the influence of the extent of plastic deformation, rate of deformation and the attendant temperature). However, this model displays serious shortcomings when used in the engineering analyses of various hot-working processes (i.e. those utilizing temperatures higher than the material recrystallization temperature). These shortcomings are related to the fact that microstructural changes involving: (i) irreversible decrease in the dislocation density due to the operation of annealing/recrystallization processes; (ii) increase in grain size due to high-temperature exposure; and (iii) dynamic recrystallization-induced grain refinement, are not accounted for by the model. In the present work, an attempt is made to combine the basic physical-metallurgy principles with the associated kinetics relations in order to properly modify the Johnson-Cook material model, so that the model can be used in the analyses of metal hot-working and joining processes. The model is next used to help establish relationships between process parameters, material microstructure and properties in FSW welds of AA5083 (a non-age-hardenable, solid-solution strengthened, strain-hardened/stabilized Al-Mg-Mn alloy); and (c) FSW-joint failure mechanisms under ballistic impact loading conditions: A critical assessment is carried out of the microstructural changes, of the associated reductions in material mechanical properties and of the attendant ballistic-impact failure mechanisms in prototypical Friction Stir Welding (FSW) joints found in armor structures made of high-performance aluminum alloys (including solution-strengthened and age-hardenable aluminum alloy grades). It is argued that due to the large width of FSW joints found in thick aluminum-armor weldments, the overall ballistic performance of the armor is controlled by the ballistic limits of its weld zones (e.g. heat affected zone, the thermo-mechanically affected zone, the nugget, etc.). Thus, in order to assess the overall ballistic survivability of an armor weldment, one must predict/identify welding-induced changes in the material microstructure and properties and the operative failure mechanisms in different regions of the weld. Towards that end, a procedure is proposed in the present work which combines the results of the FSW process modeling, basic physical-metallurgy principles concerning microstructure/property relations and the fracture mechanics concepts related to the key blast/ballistic-impact failure modes. The utility of this procedure is demonstrated using the case of a solid-solution strengthened and cold-worked aluminum alloy armor FSW-weld test structure.

Friction Stir Welding And Processing Vii

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Author : Rajiv Mishra
language : en
Publisher: Springer
Release Date : 2016-12-01

Friction Stir Welding And Processing Vii written by Rajiv Mishra and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-12-01 with Technology & Engineering categories.

This collection focuses on all aspects of science and technology related to friction stir welding and processing.

Friction Stir Welding And Processing Viii

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Author : Rajiv S. Mishra
language : en
Publisher: John Wiley & Sons
Release Date : 2015-02-18

Friction Stir Welding And Processing Viii written by Rajiv S. Mishra and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-18 with Technology & Engineering categories.

This symposium focuses on all aspects of science and technology related to friction stir welding and processing. This is the eighth proceedings volume from this recurring TMS symposium.

Advances In Friction Stir Welding And Processing

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Author : M.-K. Besharati-Givi
language : en
Publisher: Elsevier
Release Date : 2014-12-08

Advances In Friction Stir Welding And Processing written by M.-K. Besharati-Givi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-12-08 with Technology & Engineering categories.

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