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Effect of pre-corroded on fatigue behavior of MAO treated ZK60 magnesium alloy in a simulated body fluid
  • +1
  • Ying Xiong,
  • Jie Yang,
  • Yi Yu,
  • Liuyong He
Ying Xiong
Zhejiang University of Technology
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Jie Yang
Zhejiang University of Technology
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Yi Yu
Zhejiang University of Technology
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Liuyong He
Zhejiang University of Technology
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Abstract

A bio-ceramic coating was prepared on the surface of ZK60 magnesium alloys by micro-arc oxidation (MAO) method. The substrate (BM) and coated (MAO) specimens were pre-corroded in a simulated body fluid (SBF) for 12 h. Strain-controlled and stress-controlled loading modes were used to conduct fatigue tests for the two specimens, respectively. The cyclic deformation behavior of the two specimens with non-corroded and pre-corroded was studied. The mechanism of cyclic deformation under different loading conditions is related to twinning and slip. At the same test conditions, the fatigue life of the non-corroded BM specimen is higher than that of the non-corroded MAO specimen, while the fatigue life of the pre-corroded MAO specimen is higher than that of the pre-corroded BM specimen. A modified total strain energy model is proposed and the precision of life prediction is higher than that of traditional fatigue model.

Peer review status:IN REVISION

17 Apr 2021Submitted to Fatigue & Fracture of Engineering Materials & Structures
17 Apr 2021Assigned to Editor
17 Apr 2021Submission Checks Completed
19 Apr 2021Reviewer(s) Assigned
26 May 2021Review(s) Completed, Editorial Evaluation Pending
21 Jun 2021Editorial Decision: Revise Major
20 Aug 20211st Revision Received