Residual Stresses in Friction Stir Welding - 1st Edition - ISBN: 9780128001509, 9780128007327

Residual Stresses in Friction Stir Welding

1st Edition

Authors: Nilesh Kumar Rajiv Mishra John Baumann
eBook ISBN: 9780128007327
Paperback ISBN: 9780128001509
Imprint: Butterworth-Heinemann
Published Date: 21st November 2013
Page Count: 60
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Table of Contents

Preface to the Friction Stir Welding and Processing Book Series

Chapter 1. Introduction

1.1 Residual Stresses

1.2 Implication of RS

Chapter 2. A Brief Introduction to FSW

Chapter 3. RS in FSW Process

3.1 Materials Studied

3.2 RS in Aluminum Alloys

3.3 RS in Other Materials

3.4 Summary of RS in Ferrous and Nonferrous Materials

Chapter 4. Effect of RS on Properties

4.1 Mechanical Properties

4.2 Stress-Corrosion Cracking

Chapter 5. Parameters Affecting RS

5.1 The Effect of Tool Traverse Speed

5.2 The Effect of Tool Rotation Rate

5.3 Sample Size for Measurement of RS

Chapter 6. Characterization of RS

Chapter 7. Model for Understanding Residual Stress Development in Friction Stir-Welded Structures

7.1 Description of the Model

7.2 Computational Validation of the Model

7.3 Differences in RS in Fusion Welding and FSW

Chapter 8. Mitigation of RS During FSW

8.1 The Effect of Heat Sink (Thermal Tensioning) on the Residual Stress

8.2 The Effect of Mechanical Tensioning on the Residual Stress

8.3 The Effect of Roller Tensioning on the Residual Stress

8.4 The Effect of Laser and Shot Peening on RS

Chapter 9. Simulation of FSW for RS and Distortions

Chapter 10. Summary, Conclusions, and Future Direction

References


Description

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.

Key Features

  • 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

Details

No. of pages:
60
Language:
English
Copyright:
© Butterworth-Heinemann 2014
Published:
Imprint:
Butterworth-Heinemann
eBook ISBN:
9780128007327
Paperback ISBN:
9780128001509

About the Authors

Nilesh Kumar Author

Affiliations and Expertise

Department of Materials Science and Engineering, University of North Texas, Denton, TX, USA

Rajiv Mishra Author

Rajiv S. Mishra is a professor in the Department of Materials Science and Engineering, and Site Director, NSF IUCRC for Friction Stir Processing, at the University of North Texas. Dr. Mishra’s publication record includes 255 papers with an h-index of 39. Out of these, 10 of his papers have more than 100 citations. He has many ‘firsts’ in the field of friction stir welding and processing. He co-authored the first review paper (2005), co-edited the first book on the subject (2007), edited/co-edited seven TMS symposium proceedings, and served as guest editor for Viewpoint Set in Scripta Materialia (2008). He also has three patents in this field. He published the first paper on friction stir processing (2000) as a microstructural modification tool.

Affiliations and Expertise

Dept. of Materials Science and Engineering and NSF IUCRC for Friction Stir Processing, University of North Texas, Denton, TX, USA

John Baumann Author

Affiliations and Expertise

Boeing Phantom Works Advanced Manufacturing R&D