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Failure mechanisms of advanced welding processes

Edited by X Sun, Pacific Northwest National Laboratory, USA

 - provides a critical analysis of advanced welding techniques and their potential failure mechanisms
 - experts in the field survey a range of welding processes and examine reactions under various types of loading conditions
 - examines the current state of fatigue life prediction of welded materials and structures in the context of spot welded joints and non-destructive evaluation of quality
 - includes a a comprehensive assessment of fatigue in laser welds and considers methods, applications and future trends in laser welding

Many new, or relatively new, welding processes such as friction stir welding, resistance spot welding and laser welding are being increasingly adopted to replace or improve on traditional welding techniques. Before advanced welding techniques are employed, their potential failure mechanisms should be well understood and their suitability for welding particular metals and alloys in different situations should be assessed. Failure mechanisms of advanced welding processes provides a critical analysis of advanced welding techniques and their potential failure mechanisms.

The book contains chapters on the following topics: Mechanics modelling of spot welds under general loading conditions and applications to fatigue life predictions, Resistance spot weld failure mode and weld performance for aluminium alloys, dual phase steels and TRIP steels, Fatigue behaviour of spot welded joints in steel sheets, Non-destructive evaluation of spot weld quality, Solid state joining - fundamentals of friction stir welding, Failure mechanisms in friction stir welds, Microstructure characteristics and mechanical properties of laser weld bonding of magnesium alloy to aluminium alloy, Fatigue in laser welds, Weld metal ductility and its influence on formability of tailor welded blanks, Joining of lightweight materials using reactive nanofoils, and Fatigue life prediction and improvements for MIG welded advanced high strength steel weldments.

With its distinguished editor and international team of contributors, Failure mechanisms of advanced welding processes is a standard reference text for anyone working in welding and the automotive, shipbuilding, oil and gas and other metal fabrication industries who use modern and advanced welding processes.

ISBN 1 84569 536 4
ISBN-13: 978 1 84569 536 1
July 2010
336 pages  234 x 156mm  hardback  
£135.00 / US$230.00 / €170.00

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About the editor

Dr Xin Sun is a staff scientist at the Pacific Northwest National Laboratory in the United States. Dr Sun works in the Computational Sciences & Mathematics Division and has a broad range of experience in the areas of applied mechanics and computational materials.

Titles which may also be of interest:
Friction stir welding
Real-time weld process monitoring
Fatigue assessment of welded joints by local approaches
Cumulative damage of welded joints

Contents

Mechanics modeling of spot welds under general loading conditions and applications to fatigue life predictions
J Pan and K Sripichai, University of Michigan, USA, P–C Lin, National Chung Cheng University, Taiwan; D–A Wang, National Chung Hsing University and S-H Lin, SuperAlloy Industrial Co. Ltd., Taiwan
 - Introduction
 - Spot weld in a finite plate under general loading conditions
 - Closed-form solutions for a plate with an inclusion
 - Stress intensity factor solutions for a strip under various types of loading conditions
 - Kinked fatigue crack model for spot welds
 - Life predictions for spot welds in lap-shear specimens
 - Conclusions
 - Acknowledgements
 - References

Resistance spot weld failure mode and weld performance for aluminium alloys
X Sun, Pacific Northwest National Laboratory, USA
 - Introduction
 - Experimental study of aluminium spot welds
 - Statistical data analysis for aluminium spot welds
 - Analytical failure mode prediction for aluminium spot welds under cross tension loading condition
 - Model validation and discussions of aluminium spot welds
 - Conclusions
 - References

Resistance spot weld performance and weld failure modes for dual phase and TRIP steels
M Tumuluru, United States Steel Corporation, USA
 - Introduction
 - Method of production and microstructure of steels
 - Resistance spot welding behaviour
 - Weld failure modes
 - Future trends
 - Summary
 - References

Fatigue behavior of spot welded joints in steel sheets
S K Khanna, University of Missouri and X Long, Center for Reliable Energy Systems, USA
 - Introduction
 - Experimental testing of fatigue behaviour of spot welds
 - Micro-hardness measurements in spot welds
 - Fracture modes and microstructure in spot welds
 - Random loading fatigue test in spot welds
 - Effect of residual stress on fatigue behaviour of spot welded joints
 - Models for fatigue life prediction of spot welded joints
 - Fatigue life assessment approaches for spot welds
 - Current status of fatigue life prediction of welded materials or structures
 - Conclusions
 - Acknowledgements
 - References

Non-destructive evaluation of spot weld quality
B Ghaffari, Ford Motor Company and G Mozurkewich, formerly Ford Motor Company, USA
 - Introduction
 - Background
 - Techniques for non-destructive evaluation of spot welds
 - Single-element ultrasonic inspection
 - Ultrasonic imaging
 - Additional materials and welding techniques
 - In-process ultrasonic monitoring
 - History and future trends
 - Conclusions
 - References

Solid state joining: fundamentals of friction stir welding
K J Colligan, Concurrent Technologies Corporation, USA
 - Overview of process principles
 - Comparison to other welding processes
 - Welding tools
 - Parameter effects
 - Materials
 - Joint geometries
 - References

Failure mechanisms in friction stir welds
M N James, University of Plymouth, UK, D G Hattingh, H Lombard, I Wedderburn, D L H Bulbring and A Els-Botes, Nelson Mandela Metropolitan University, South Africa and A Steuwer, ESS Scandinavia, Sweden
 - Introduction
 - Defects in linear friction stir welds
 - Crack paths in tensile and fatigue fracture
 - Friction taper stud welding
 - Friction stir spot welds
 - Residual stresses in friction stir welds
 - Conclusions
 - Acknowledgements
 - References

Microstructure characteristics and mechanical properties of the magnesium and aluminium alloy laser weld bonded joint
L Liu, Dalian University of Technology, China
 - Introduction of laser weld bonding technique
 - Laser weld bonding process
 - Microstructure analyses of laser weld bonding Mg to Al joint
 - Mechanical properties of laser weld bonding Mg to Al joint
 - Future trends
 - References

Fatigue in laser welds
V Caccese, University of Maine, USA
 - Introduction
 - Methods of laser welding
 - Applications of laser welding
 - Future trends in laser welding
 - Properties of laser welded materials
 - Fatigue life prediction in welded joints
 - Fatigue tests of laser welded specimens
 - Conclusions
 - References

Weld metal ductility and its influence on formability of tailor welded blanks
A A Zadpoor, Materials Innovation Institute (M2i) and J Sinke, Delft University of Technology, The Netherlands
 - Introduction
 - Mechanical properties of tailor welded blanks
 - Formability of tailor welded blanks
 - Formability prediction of tailor welded blanks
 - Concluding remarks
 - Future trends
 - Sources of further information and advice
 - Acknowledgements
 - References

Joining of lightweight materials using reactive nanofoils
X Sun, Pacific Northwest National Laboratory, USA
 - Introduction
 - Joint population definition and fabrication
 - Results
 - Comparison with automotive adhesive bonds
 - Conclusions and discussions
 - References