Friction Stir Superplasticity for Unitized Structures

A volume in the Friction Stir Welding and Processing Book Series


  • Zongyi Ma, Ph.D., Professor, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
  • Rajiv Mishra, Dept. of Materials Science and Engineering and NSF IUCRC for Friction Stir Processing, University of North Texas, Denton, TX, USA

This book describes the fundamentals and potential applications of ‘friction stir superplasticity for unitized structures’. Conventional superplastic forming of sheets is limited to the thickness of 3 mm because the fine grained starting material is produced by rolling. Friction stir superplasticity has grown rapidly in the last decade because of the effectiveness of microstructural refinement. The thickness of the material remains almost constant, and that allows for forming of thick sheets/plates, which was not possible before. The field has reached a point where designers have opportunities to expand the extent of unitized structures, which are structures in which the traditional primary part and any supporting structures are fabricated as a single unit. With advanced optimization and material considerations, this class of structures can be lighter weight and more efficient, making them less costly, as well as mechanically less complex, reducing areas of possible failure.
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Researchers, design engineers, materials processing engineers, welding engineers and students


Book information

  • Published: May 2014
  • ISBN: 978-0-12-420006-7

Table of Contents

  1. Introduction
  2. Friction stir microstructure for superplasticity
  3. High-strain-rate superplasticity
  4. Low temperature superplasticity
  5. Superplasticity of cast alloy – an example
  6. Superplastic deformation mechanism
  7. Enhanced deformation kinetics
  8. Cavitation during superplasticity
  9. Abnormal grain growth
  10. Superplastic forming of friction stir processed plates
  11. Potential of extending superplasticity to thick sections
  12. Summary
  13. References