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Residual stresses, microstructure and tensile properties in Ti-6Al-4V friction stir welds

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Author

  • Axel Steuwer
  • D. G. Hattingh
  • M. N. James
  • U. Singh
  • T. Buslaps

Summary, in English

This paper reports the results of a systematic investigation of residual stresses as a function of welding speed in a set of Ti-6Al-4V friction stir welds. The investigation focuses on residual stress but links these data with microstructural information derived from micrographs and hardness measurements as well as mechanical testing results. Residual stresses were determined using energy dispersive synchrotron X-ray diffraction, which allows phase specific stresses to be distinguished. The data presented in this paper demonstrate that welds with high tensile properties can be obtained, which also have relatively low peak tensile residual stress values of similar to 30% of the tensile strength. The data also show a clear correlation between heat input and the width of the residual stress profile.

Publishing year

2012

Language

English

Pages

525-533

Publication/Series

Science and Technology of Welding and Joining

Volume

17

Issue

7

Document type

Journal article

Publisher

Maney Publishing

Topic

  • Physical Sciences
  • Natural Sciences

Keywords

  • Residual stress
  • Ti-6Al-4V
  • Titanium
  • Friction stir weld
  • Microstructure
  • Synchrotron X-ray diffraction

Status

Published

ISBN/ISSN/Other

  • ISSN: 1362-1718