Textures in Single-Crystal Aluminum Friction Stir Spot Welds

  • Toshiya Shibayanagi
  • Adrian P. Gerlich
  • Keizo Kashihara
  • Thomas H. North

DOI: 10.1007/s11661-008-9766-0

Cite this article as:
Shibayanagi, T., Gerlich, A.P., Kashihara, K. et al. Metall and Mat Trans A (2009) 40: 920. doi:10.1007/s11661-008-9766-0


The present article examines the textural features produced during friction stir spot welding of single-crystal aluminum sheet. The crystal has the {111} plane perpendicular to the normal direction (ND) of the sheet, and the \( \left\langle { 1 10} \right\rangle \) direction parallel to the growth direction (GD). Friction stir spot welding was carried out using a rotation speed of 1500 rpm and a dwell time of 2 seconds, and completed spot welds were characterized using a combination of optical microscopy and electron backscatter diffraction (EBSD). The EBSD measurements indicate there are no significant changes in orientation in locations more than 840 μm from the stir-zone extremity. The orientation distribution in the thermomechanically-affected zone (TMAZ) region conformed with the {110}⊥ND orientation within 580 μm of the stir-zone extremity. In the location immediately adjacent to the stir-zone extremity, there was a deviation from the {110}//ND orientation due to a combination of compressive loading perpendicular to the stir-zone boundary and shear loading in the direction of tool rotation. It is suggested a {111}⊥ND texture in the stir zone is associated with material flow imposed by the thread on the rotating pin.

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2009

Authors and Affiliations

  • Toshiya Shibayanagi
    • 1
  • Adrian P. Gerlich
    • 2
  • Keizo Kashihara
    • 3
  • Thomas H. North
    • 4
  1. 1.Joining and Welding Research Institute (JWRI)Osaka UniversityOsakaJapan
  2. 2.Department of Chemical and Materials EngineeringUniversity of AlbertaEdmontonCanada
  3. 3.Department of Mechanical EngineeringWakayama National College of Technology WakayamaJapan
  4. 4.Department of Materials Science and EngineeringUniversity of TorontoTorontoCanada

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