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Effect of rolling process on fatigue performance of stir zone of AA6061 DS-FSW joint
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  • Chengchao Du,
  • Qiuhong Pan,
  • Shujin Chen,
  • Shuang Tian
Chengchao Du
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Qiuhong Pan
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Shujin Chen
Jiangsu University of Science and Technology
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Shuang Tian
Southeast University
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Abstract

Stir zone (SZ) of AA6061-T6 double-side friction stir welding (DS-FSW) joint with a thickness of 6 mm had a poor fatigue performance compared with that of base metal (BM). The rolling process was employed to improve the fatigue performance of SZ. The results showed that rolling process increased the dislocation density in SZ and remarkably enhanced its fatigue performance. The crack initiation played a key role in the fatigue performance of SZ. It relied on the debonding of lamellar structure in SZ. The debonding of lamellar structure depended on the cracking of fine grain layer in lamellar structure.

Peer review status:IN REVISION

13 Jul 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
14 Jul 2020Assigned to Editor
14 Jul 2020Submission Checks Completed
15 Jul 2020Reviewer(s) Assigned
25 Aug 2020Review(s) Completed, Editorial Evaluation Pending
18 Sep 2020Editorial Decision: Revise Major