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Study on Very high-cycle Bending Vibration Fatigue Performance of TC17 Titanium Alloys under Corrosion and Laser Shock Processing
  • +4
  • Hui Zhang,
  • Xuan Chen,
  • Quantong Li,
  • Li Cheng,
  • Jingsheng Shen,
  • Wenbin Cui,
  • Changkai Wang
Hui Zhang
Air Force Engineering University
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Quantong Li
Air Force Engineering University
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Li Cheng
Air Force Engineering University
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Jingsheng Shen
Air Force Engineering University
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Wenbin Cui
Air Force Engineering University
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Changkai Wang
Air Force Engineering University
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Peer review status:UNDER REVIEW

23 Jun 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
24 Jun 2020Assigned to Editor
24 Jun 2020Submission Checks Completed
26 Jun 2020Reviewer(s) Assigned
29 Jul 2020Review(s) Completed, Editorial Evaluation Pending

Abstract

In this paper, the very high-cycle fatigue performance of TC17 titanium alloys under corrosion environment and laser shock was studied by the load of first-order bending vibration. The results show that the very high cycle fatigue performance of TC17 titanium alloys has no fatigue limit in the traditional sense and different surface processing has different effects on the very high cycle fatigue properties of TC17 titanium alloys. The very high cycle fatigue performance of TC17 under corrosion environment did not decrease significantly, but the very high cycle fatigue performance of TC17 strengthened by laser shock treatment could be greatly improved. With the SEM analysis, it was found that the specimen crack initiation showed two modes: surface and sub-surface, which was independent of the internal inclusions and defects. No sign of internal crack initiation was found and the sub-surface crack propagation did not show “fish-eye”.