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Influence of temperature on the R-effect for the fatigue crack growth of nickel-base superalloy GH4169
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  • He Liu,
  • Xiaoguang YANG,
  • Shaolin Li,
  • Cheng Yan
He Liu
Xiamen University School of Aerospace Engineering

Corresponding Author:liu_he@outlook.com

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Xiaoguang YANG
Beihang University
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Shaolin Li
Beihang University
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Cheng Yan
Xiamen University School of Aerospace Engineering
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Abstract

The stress ratio ( R) effect, especially at elevated temperatures, is associated with the fatigue crack growth (FCG) prediction in aero-engine hot-end components under complex operation conditions. The FCG experiments with three R were conducted on Ni-based superalloy GH4169 at room temperature (RT), 550 °C, and 700 °C. The results indicate that the R-effect on the FCG of GH4196 is temperature-dependent. Therefore, efforts were made to identify the R-effect at various temperatures to describe the FCG. The concept of the crack-closure or the two-driving-force was examined to quantify the R-effect considering the temperature influence. Fractographic analyses on the fracture surface were performed to discuss the underlying mechanism responsible for the temperature influence. The study can contribute to the R-dependent FCG modeling at various temperatures.
21 Mar 2022Submitted to Fatigue & Fracture of Engineering Materials & Structures
21 Mar 2022Submission Checks Completed
21 Mar 2022Assigned to Editor
24 Mar 2022Reviewer(s) Assigned
03 May 2022Review(s) Completed, Editorial Evaluation Pending
25 May 2022Editorial Decision: Revise Major
08 Jul 20221st Revision Received
14 Jul 2022Submission Checks Completed
14 Jul 2022Assigned to Editor
14 Jul 2022Reviewer(s) Assigned
20 Jul 2022Review(s) Completed, Editorial Evaluation Pending
21 Jul 2022Editorial Decision: Accept
Oct 2022Published in Fatigue & Fracture of Engineering Materials & Structures volume 45 issue 10 on pages 3025-3039. 10.1111/ffe.13801