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Science and Technology of Welding and Joining Volume 25, 2020 - Issue 1
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Research Articles

Achieving equal fatigue strength to base material in a friction stir welded 5083-H19 aluminium alloy joint

B. B. WangSchool of Materials Science and Engineering, Northeastern University, Shenyang, People’s Republic of China;Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of ChinaView further author information
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P. XueShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of ChinaCorrespondence[email protected]
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B. L. XiaoShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of ChinaView further author information
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W. G. WangShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of ChinaCorrespondence[email protected]
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Y. D. LiuSchool of Materials Science and Engineering, Northeastern University, Shenyang, People’s Republic of ChinaView further author information
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Z. Y. MaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People’s Republic of ChinaView further author information
Pages 81-88 | Received 24 Apr 2019, Accepted 03 Jun 2019, Published online: 18 Jun 2019
 
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ABSTRACT

By using a low rotation rate of 200 rpm with additional water cooling, a friction stir welded (FSW) joint with equal fatigue strength to the base material (BM) was obtained in 5083Al-H19 rolled plates due to the significantly decreased softening and the residual stress effect. Though the hardness value in the heat affected zone (HAZ) was a little lower than that of the BM, the decreased tensile effect of the residual stress in the HAZ greatly improved the fatigue performance, which was even higher than that of the BM, so the final fracture occurred at the BM. This study provides an effective strategy to enhance the fatigue performance of the FSW joints.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 51331008].

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