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Material Flow and Microstructure Evolution in Corner Friction Stir Welding of 5083 Al Alloy Using AdStir Technique

  • Kunitaka MasakiEmail author
  • Hiroshi Saito
  • Koji Nezaki
  • Shoko Kitamoto
  • Yutaka S. Sato
  • Hiroyuki Kokawa
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

During corner AdStir fillet stationary shoulder friction stir welding (FSW), filler material with surface oxide is fed into the stir zone. In this study, the material flow of the filler material and surface oxide layer during the process was investigated by microstructure observation. To visualize the material flow, a marker insert technique was employed. Similar to conventional FSW, fine and equiaxed grain structure was observed in the stir zone. EBSD investigation revealed that the material flow was governed by the simple shear deformation induced by the rotating probe. The filler material was widely distributed in the stir zone, suggesting that some amount of the filler material moved downward due to the vertical material flow. The initial surface layer on the filler material was finely broken up by the material flow, achieving metallic bonding between the filler wire and the plates. Any harmful effects by adding the filler material were not found in the mechanical tests in this study.

Keywords

Friction stir welding AdStir Material flow 

Notes

Acknowledgements

The authors are grateful to Mr. Y. Ishii for technical assistance and Dr. S. Mironov and Dr. K. Kobayashi for technical support. Thanks also go to Dr. N. Oiwa and Mr. K. Kojima for helpful discussion.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Kunitaka Masaki
    • 1
    Email author
  • Hiroshi Saito
    • 2
  • Koji Nezaki
    • 3
  • Shoko Kitamoto
    • 4
  • Yutaka S. Sato
    • 4
  • Hiroyuki Kokawa
    • 1
  1. 1.Welding Technology Department, Production Engineering Center, Corporate Research and DevelopmentIHI CorporationIsogo-ku, YokohamaJapan
  2. 2.Mechanical Technology Department, Products Development Center, Corporate Research and DevelopmentIHI CorporationIsogo-ku, YokohamaJapan
  3. 3.Production Engineering Center, Corporate Research and DevelopmentIHI CorporationIsogo-ku, YokohamaJapan
  4. 4.Department of Materials ProcessingGraduate School of Engineering, Tohoku UniversityAoba-Ku, SendaiJapan

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