Skip to main content

Fatigue In Friction Stir Welding

In Order to Read Online or Download Fatigue In Friction Stir Welding Full eBooks in PDF, EPUB, Tuebl and Mobi you need to create a Free account. Get any books you like and read everywhere you want. Fast Download Speed ~ Commercial & Ad Free. We cannot guarantee that every book is in the library!

Fatigue in Friction Stir Welding

Fatigue in Friction Stir Welding Book
Author : J. Brian Jordon,Robert Amaro,Paul Allison,Harish Rao
Publisher : Butterworth-Heinemann
Release : 2019-02-27
ISBN : 0128163054
Language : En, Es, Fr & De

GET BOOK

Book Description :

Fatigue in Friction Stir Welding provides knowledge on how to design and fabricate high performance, fatigue resistance FSW joints. It summarizes fatigue characterizations of key FSW configurations, including butt and lap-shear joints. The book's main focus is on fatigue of aluminum alloys, but discussions of magnesium, steel, and titanium alloys are also included. The FSW process-structure-fatigue performance relationships, including tool rotation, travel speeds, and pin tools are covered, along with sections on extreme fatigue conditions and environments, including multiaxial, variable amplitude, and corrosion effects on fatigue of the FSW. From a practical design perspective, appropriate fatigue design guidelines, including engineering and microstructure-sensitive modeling approaches are discussed. Finally, an appendix with numerous representative fatigue curves for design and reference purposes completes the work. Provides a comprehensive characterization of fatigue behavior for various FSW joints and alloy combinations, along with an in-depth presentation on crack initiation and growth mechanisms Presents the relationships between process parameters and fatigue behavior Discusses modeling strategies and design recommendations, along with experimental data for reference purposes

Fatigue of Friction Stir Welded Lap Joints with Sealants

Fatigue of Friction Stir Welded Lap Joints with Sealants Book
Author : Kenneth Thomas Nathaniel Doering
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

"A lack of understanding of corrosion fatigue in friction stir welded aluminum joints prevents friction stir welding from being implemented in aerospace applications. Fatigue testing reveals a 60-75% reduction in the fatigue life of friction stir welded aluminum lap joints immersed in 3.5% NaCl solution (corrosion fatigue) compared with that of lap joints tested in ambient air. The loss in fatigue life is attributed to accelerated fatigue cracking due to hydrogen environment embrittlement. Two polymer sealant candidates are investigated: silicone rubber and nylon-11. Both sealant candidates can be applied prior to welding and seal the faying surface gaps in lap joints upon welding. The rubber sealant cures at room temperature after welding and can be welded with the same parameters as without the sealant. The 50% sample population corrosion fatigue life is increased by 22% with the use of the rubber sealant, but the effectiveness of the rubber sealant is limited by its cohesive mechanical properties, e.g. elongation to failure. In ambient fatigue, the nylon sealed welds exhibit twice the 50% sample population fatigue life of other welds. Finite element modeling predicts a reduction in the stresses in the weld due the stiffness contribution of the nylon sealant. The effectiveness of the nylon sealant is limited by its adhesive bond strength. When immersed in water, as in corrosion fatigue, the adhesive bond strength is reduced, the sealant bond fails within 500 fatigue cycles, and the mechanical benefits of the nylon sealant are negated. The corrosion fatigue life of nylon sealed welds is 26% less than that of welds without sealant because of the more severe hook defect associated with hotter welding conditions required to melt the nylon. Finite element modeling results indicate an increase in stress intensity factors of about 10% in welds with more severe hook defects--Abstract, leaf iii.

An Investigation Into Methods to Increase the Fatigue Life of Friction Stir Lap Welds

An Investigation Into Methods to Increase the Fatigue Life of Friction Stir Lap Welds Book
Author : Farzad Baratzadeh
Publisher : Unknown
Release : 2010
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Recent advancements in friction stir welding (FSW) technology have potential for applications in aerospace structures. Friction stir spot welds have been found to be much stronger than rivets in the same material thickness, while maintaining the discontinuous crack growth path preferred by aircraft designers. In this study, the test coupons have been investigated in fatigue with the weld aligned with the loading direction. The purpose of this study was to better understand crack initiation at friction stir weld exit holes in no-load transfer coupons representative of aircraft fuselage applications. The goal was to document the effects of weld exit location on fatigue life in discontinuous friction stir welded panels and to determine possible solutions in order to reduce the stress concentration around the exit hole location, thereby increasing the panel's fatigue life. Aluminum alloys 7075-T6 and 2024-T3, which are commonly used in conventional airframe construction, were chosen for the FSW lap welds in this thesis. The methodology of this research was to weld the coupons with discontinuous friction stir lap welding using different exit hole configurations. The weld parameters such as rotation speed, travel speed, lead angle and load force had already been evaluated prior to this investigation in an earlier study during the first year of this project by Josh Merry. Once all of the coupons were welded, the next step was to fatigue test them with constant amplitude in order to determine the number of fatigue cycles and then compare all the different coupon results with the baseline coupon result that were determined in the previous study. This project investigated a number of weld exit strategies with conventional one-piece weld tools. This study also included welds produced with a two-piece weld tool called Retractable Pin Tool (RPT) in which the length of the tool probe can be adjusted during welding. The RPT weld tool was used to eliminate the exit hole of the weld in order to reduce or eliminate viii the stress concentration around the weld exit. The ultimate goal of this research was to achieve equivalent or better fatigue life in discontinuous FSW joints as compared to riveted coupons.

Mechanical Metallurgical and Fatigue Properties of Friction Stir Welded and Tungsten Inert Gas Welded AA6061 T6 Aluminium Alloys

Mechanical  Metallurgical and Fatigue Properties of Friction Stir Welded and Tungsten Inert Gas Welded AA6061 T6 Aluminium Alloys Book
Author : Akshansh Mishra,A Razal Rose,Saravanan .M,Anand Singh
Publisher : GRIN Verlag
Release : 2017-09-11
ISBN : 3668521638
Language : En, Es, Fr & De

GET BOOK

Book Description :

Project Report from the year 2017 in the subject Engineering - Mechanical Engineering, grade: 8.9, SRM University, language: English, abstract: This paper deals with the mechanical, microstructural and fatigue analysis of welded joints. In the study, 6061-T6 aluminium alloy plates in 4mm thickness, that are particularly used for aerospace and in automotive industries, were welded using Tungsten Inert Gas (TIG) welding and Friction Stir Welding (FSW) methods as similar joints with one side pass and parameters of varying tool rotation, weld speed and 2.3 degree tool tilt angle. The weld zones cross sections were analysed with light optical microscopy (LOM). During recent years several investigations have been made of fatigue properties of friction stir welded joints. The great majority of available data from the fatigue analysis of friction stir welded joints are concerned with uniaxial loading conditions for a simple geometry. In uniaxial loading nominal stress is normally used as reference stress and it is easy to determine. However, fatigue failure is a highly localized phenomenon in engineering components and determining the nominal stress is not always possible due to the complexity of structures and presence of stress concentrators such as notches and cracks in which many approaches based on local parameters.

Fatigue Behaviour of Aluminum Friction Stir Welds Under Highway Bridge Conditions

Fatigue Behaviour of Aluminum Friction Stir Welds Under Highway Bridge Conditions Book
Author : Shi Hui Guo
Publisher : Unknown
Release : 2018
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Friction stir welding (FSW) is a solid state joining process performed by rotating a cylindrical tool with a short protrusion between the two metal pieces to be joined. The combination of frictional and deformation heating leads to the consolidation of the joint. This welding method is rapidly growing in popularity in many applications, particularly in aluminum alloys for transportation vehicle (rail cars, ships) and bridge applications. Across North America, over 150,000 bridges have been identified as “structurally deficient” or “functionally obsolete”. Since FSW has the potential to have a positive influence on their durability and economics, the Aluminum Association of Canada (AAC) has identified the possibility of replacing promoting aluminum bridge decks as a means of replacing existing deficient concrete decks. However, currently available codes and guidelines for aluminum welded joints only address structures made with conventional welding methods. Therefore, bridge designers are lacking the necessary knowledge to use FSW joints in their designs. The main objective of this thesis is to present a fatigue testing study to support the development of improved “performance-based” code provisions for the quality control and fatigue design of FSW joints by examining the durability of FSW joints with prescribed flaws. In order to obtain the experimental results, various intentionally flawed aluminum FSW samples were fabricated for fatigue testing under constant amplitude (CA) and simulated in-service variable amplitude (VA) loading conditions. A statistical analysis of the results has been performed to assess the influence of the various defect types. It has also been shown how finite element (FE) analysis using the software ABAQUS can be used to assess the influence of the defects on the local stresses within the welded joints. Lastly, it is shown how the fatigue performance of the welds can be predicted using linear elastic fracture mechanics (LEFM). The results of this research will contribute to an improved understanding of the behaviour of imperfect FSW joints under fatigue loading conditions, which simulate in-service vehicular bridge VA loading. The main conclusions of this research include the following: 1) The worst fatigue lives were observed in the specimens with “kissing bond” defects at the weld root (on the order of approximately 1 mm in depth), 2) toe flash, undercut, and worm hole defects, as well as surface improvement by polishing were seen to have a much lower influence on fatigue performance, 3) a novel “lap joint” specimen simulating an extruded bridge deck joint was also observed to fail at the root at a nominal stress level lower than that of a properly-welded butt joint.

Friction Stir Welding and Processing

Friction Stir Welding and Processing Book
Author : Rajiv S. Mishra,Murray W. Mahoney
Publisher : ASM International
Release : 2007
ISBN : 1615030972
Language : En, Es, Fr & De

GET BOOK

Book Description :

This book covers the rapidly growing area of friction stir welding. It also addresses the use of the technology for other types of materials processing, including superplastic forming, casting modification, and surface treatments. The book has been prepared to serve as the first general reference on friction stir technology,. Information is provided on tools, machines, process modeling, material flow, microstructural development and properties. Materials addressed include aluminum alloys, titanium alloys, steels, nickel-base alloys, and copper alloys. The chapters have been written by the leading experts in this field, representing leading industrial companies and university and government research insititutions.

Corrosion Fatigue of Friction Stir Welds

Corrosion Fatigue of Friction Stir Welds Book
Author : Jesse Loren Henrikson,Matthew Cavalli
Publisher : Unknown
Release : 2010
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Corrosion Fatigue of Friction Stir Welds book written by Jesse Loren Henrikson,Matthew Cavalli, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Fatigue Strength of Friction Stir Welded Joints in Aluminium

Fatigue Strength of Friction Stir Welded Joints in Aluminium Book
Author : Mats Ericsson,Kungl. Tekniska högskolan i Stockholm. Institutionen för materialvetenskap
Publisher : Unknown
Release : 2002
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Fatigue Strength of Friction Stir Welded Joints in Aluminium book written by Mats Ericsson,Kungl. Tekniska högskolan i Stockholm. Institutionen för materialvetenskap, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Friction Stir Welding

Friction Stir Welding Book
Author : Daniela Lohwasser,Zhan Chen
Publisher : Elsevier
Release : 2009-12-18
ISBN : 1845697715
Language : En, Es, Fr & De

GET BOOK

Book Description :

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

Fatigue of friction stir welded AA2024 T351 plate

Fatigue of friction stir welded AA2024 T351 plate Book
Author : Diccon Philip Paul Booth
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Fatigue of friction stir welded AA2024 T351 plate book written by Diccon Philip Paul Booth, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

A Book about Fatigue Analysis of Welded Joints

A Book about Fatigue Analysis of Welded Joints Book
Author : Akshansh Mishra
Publisher : Createspace Independent Publishing Platform
Release : 2017-12-09
ISBN : 9781981529650
Language : En, Es, Fr & De

GET BOOK

Book Description :

In this, book the effect of Friction Stir Welding and the Tungsten Inert Gas Welding on the fatigue behavior of AA6061 Aluminium alloy has been studied. To reveal the influence of the welding parameters, different travel speeds of the welding tool have been used to provide weld seams with varying microstructural features. Crack initiation, as well as crack propagation behavior under fatigue loading, has been investigated with respect to the local microstructure at the crack initiation sites and along the crack path. Fatigue cracks were mostly initiated around the stir zone and the adjacent thermal- mechanical affected zone independent from hardness distributions in the weld seams. In some specimens, a defect-like feature was observed at the crack origins, which shortened the fatigue lives. It has been found that while the effect of the tool travel speed on the fatigue lifetime seems to be little, the varying and complex local microstructure in the weld seam basically affects both the crack initiation sites and the crack propagation paths.

Temperature and Stress Effect Modeling in Fatigue of H13 Tool Steel at Elevated Temperatures with Applications in Friction Stir Welding

Temperature and Stress Effect Modeling in Fatigue of H13 Tool Steel at Elevated Temperatures with Applications in Friction Stir Welding Book
Author : Brad Jones
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Tooling reliability is critical to welding success in friction stir welding, but tooling fatigue is not well understood because it occurs in conditions that are often unique to friction stir welding. A fatigue study was conducted on a commonly used tooling material, H13 tool steel, using constant stress loading at temperatures between 300°C and 600°C, and the results are presented. A model is proposed accounting for temperature and stress effects on fatigue life, utilizing a two-region Arrhenius temperature model. A transition in temperature effect on fatigue life is identified. Implications of the temperature effect for friction stir welding suggest that tooling fatigue life dramatically decreases above 500°C and accelerated testing should be conducted below 500°C.

Fatigue Crack Growth in Friction Stir Welded Ti 5111

Fatigue Crack Growth in Friction Stir Welded Ti 5111 Book
Author : Anonim
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

The effects of weld microstructure and weld speed on the fatigue crack growth kinetics of friction stir welded Ti-5111 were investigated. The FSW welds in Ti-5111 consist of very fine recrystallized grains, in contrast to coarse basketweave grains in the base plate. Fatigue crack growth rates are significantly lower and fatigue crack growth thresholds are significantly higher through the weld than those in the base plate. As the weld speed increases, the fatigue crack growth rates are progressively higher and fatigue crack growth thresholds lower through the weld. However, after stress-relief annealing, such differences in fatigue crack growth kinetics among different weld speeds no longer exist. Fatigue crack growth rates through post stress-relieved welds are higher than those in the base metal. The observed fatigue crack growth responses are discussed in terms of differences in crack tip microstructure, compressive residual stresses, crack closure, and crack deflection.

Fracture and Fatigue of Welded Joints and Structures

Fracture and Fatigue of Welded Joints and Structures Book
Author : K Macdonald
Publisher : Elsevier
Release : 2011-04-19
ISBN : 0857092502
Language : En, Es, Fr & De

GET BOOK

Book Description :

The failure of any welded joint is at best inconvenient and at worst can lead to catastrophic accidents. Fracture and fatigue of welded joints and structures analyses the processes and causes of fracture and fatigue, focusing on how the failure of welded joints and structures can be predicted and minimised in the design process. Part one concentrates on analysing fracture of welded joints and structures, with chapters on constraint-based fracture mechanics for predicting joint failure, fracture assessment methods and the use of fracture mechanics in the fatigue analysis of welded joints. In part two, the emphasis shifts to fatigue, and chapters focus on a variety of aspects of fatigue analysis including assessment of local stresses in welded joints, fatigue design rules for welded structures, k-nodes for offshore structures and modelling residual stresses in predicting the service life of structures. With its distinguished editor and international team of contributors, Fracture and fatigue of welded joints and structures is an essential reference for mechanical, structural and welding engineers, as well as those in the academic sector with a research interest in the field. Analyses the processes and causes of fracture and fatigue, focusing predicting and minimising the failure of welded joints in the design process Assesses the fracture of welded joints and structure featuring constraint-based fracture mechanics for predicting joint failure Explores specific considerations in fatigue analysis including the assessment of local stresses in welded joints and fatigue design rules for welded structures

Fatigue and Damage Tolerance of Friction Stir Welded Joints for Aerospace Applications

Fatigue and Damage Tolerance of Friction Stir Welded Joints for Aerospace Applications Book
Author : Hendrikus Johannes Karel Lemmen
Publisher : Unknown
Release : 2010
ISBN : 9789056230838
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Fatigue and Damage Tolerance of Friction Stir Welded Joints for Aerospace Applications book written by Hendrikus Johannes Karel Lemmen, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Fatigue Crack Growth Rate Test Results for Al Li 2195 Parent Metal Variable Polarity Plasma Arc Welds and Friction Stir Welds

Fatigue Crack Growth Rate Test Results for Al Li 2195 Parent Metal  Variable Polarity Plasma Arc Welds and Friction Stir Welds Book
Author : Robert A. Hafley
Publisher : Unknown
Release : 2000
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

The fatigue crack growth rate of aluminum-lithium (Al-Li) alloy 2195 plate and weldments was determined at 200°F, ambient temperature and -320°F. The effects of stress ratio (R), welding process, orientation and thickness were studied. Results are compared with plate data from the Space Shuttle Super Lightweight Tank (SLWT) allowables program. Data from the current series of tests, both plate and weldment, falls within the range of data generated during the SLWT allowables program.

The Fatigue Characteristics of Friction Stir Welded Stiffened Panel Structure

The Fatigue Characteristics of Friction Stir Welded Stiffened Panel Structure Book
Author : Heesuck Jung
Publisher : Unknown
Release : 2007
ISBN : 9780494336533
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download The Fatigue Characteristics of Friction Stir Welded Stiffened Panel Structure book written by Heesuck Jung, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Fatigue Fracture and Microstructural Analysis of Friction Stir Welded Butt Joints of Aerospace Aluminum Alloys

Fatigue Fracture and Microstructural Analysis of Friction Stir Welded Butt Joints of Aerospace Aluminum Alloys Book
Author : Vinay Raghuram
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Fatigue Fracture and Microstructural Analysis of Friction Stir Welded Butt Joints of Aerospace Aluminum Alloys book written by Vinay Raghuram, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Fatigue Properties of Metal Inert Gas and Friction Stir Welded Aluminium Alloy 5383 H321

Fatigue Properties of Metal Inert Gas and Friction Stir Welded Aluminium Alloy 5383 H321 Book
Author : Gareth Richard Bradley,University of Plymouth
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

GET BOOK

Book Description :

Download Fatigue Properties of Metal Inert Gas and Friction Stir Welded Aluminium Alloy 5383 H321 book written by Gareth Richard Bradley,University of Plymouth, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.