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Investigation of the material flow and texture evolution in friction-stir welded aluminum alloy

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Abstract

The material flow and crystallographic orientation in aluminum alloy sheets joined by friction stir welding (FSW) were investigated by electron back scattered diffraction (EBSD). The microstructure and microtexture of the material near the stir zone was found to be influenced by the rotational behavior of the tool pin. It was found that, during FSW, the forward movement of the tool pin resulted in loose contact between the tool pin and the receding material at the advancing side. This material behavior inside the joined aluminum plates was also observed by an X-ray micrograph by inlaying a gold marker into the plates. As the advancing speed of the tool increases at a given rotation speed, the loose contact region widens. As the microtexture of the material near the stir zone is very close to the simple shear texture on the basis of the frame of the tool pin in the normal and tangent directions, the amount of incompletely rotated material due to the loose contact could be estimated from the tilt angle of the shear texture in the pole figure around the key hole.

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Authors and Affiliations

  1. Department of Material Science and Engineering, Seoul National University, San 56-1 Shillim-dong, Gwanak-gu, Seoul, 151-744, Korea

    Suk Hoon Kang, Heung Nam Han & Kyu Hwan Oh

  2. Korea Institute of Materials Science, 66 Sangnam-dong, Changwon-si, Gyeongnam, 641-010, Korea

    Jae-Hyung Cho, Chang Gil Lee & Sung-Joon Kim

Authors
  1. Suk Hoon Kang
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  2. Heung Nam Han
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  3. Kyu Hwan Oh
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  4. Jae-Hyung Cho
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  5. Chang Gil Lee
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  6. Sung-Joon Kim
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Correspondence to Heung Nam Han.

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Kang, S.H., Han, H.N., Oh, K.H. et al. Investigation of the material flow and texture evolution in friction-stir welded aluminum alloy. Met. Mater. Int. 15, 1027–1031 (2009). https://doi.org/10.1007/s12540-009-1027-2

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  • DOI: https://doi.org/10.1007/s12540-009-1027-2

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