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Foreign Object Damage characteristics and their effects on high cycle fatigue property of Ni-based superalloy GH4169
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  • Xu Jia,
  • Zi-wen Zhang,
  • Chen Ling,
  • Xu-ping Lu,
  • Rong Jiang,
  • Yingdong Song
Xu Jia
Nanjing University of Aeronautics and Astronautics

Corresponding Author:xujiacepe@nuaa.edu.cn

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Zi-wen Zhang
Nanjing University of Aeronautics and Astronautics
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Chen Ling
Nanjing University of Aeronautics and Astronautics
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Xu-ping Lu
China Gas Turbine Establishment
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Rong Jiang
Nanjing University of Aeronautics and Astronautics
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Yingdong Song
Nanjing University of Aeronautics and Astronautics
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Abstract

In this study, high-speed ballistic impact tests were conducted on GH4169 alloy samples with the aeroengine compressor blade leading edge feature to simulate the notch-type foreign object damages (FOD). Macroscopic and microscopic characterization of FOD and high cycle fatigue tests were performed to investigate the effect of FOD depth on GH4169 alloy fatigue strength along with numerical analysis using Kitagawa-Takahashi diagram. Results show the incident side of notch-type FOD is relatively smooth, whereas the exit side is rugged. The FOD depth ranges from 0.18mm to 1.33mm, and the fatigue strength of damaged samples is 37.93%~97.04% of the undamaged samples. As FOD depth increases, damage length, material losses and stress concentration coefficient of the FOD increase significantly along with the increasing adiabatic shear bands, micro voids and cracks, resulting in fatigue strength reduction. Numerical analysis indicates that the Kitagawa-Takahashi diagram can provide a basic model for the design of FOD tolerance.
01 Nov 2021Submitted to Fatigue & Fracture of Engineering Materials & Structures
01 Nov 2021Submission Checks Completed
01 Nov 2021Assigned to Editor
01 Nov 2021Reviewer(s) Assigned
15 Nov 2021Review(s) Completed, Editorial Evaluation Pending
06 Dec 2021Editorial Decision: Revise Major
24 Dec 20211st Revision Received
24 Dec 2021Submission Checks Completed
24 Dec 2021Assigned to Editor
24 Dec 2021Reviewer(s) Assigned
24 Dec 2021Review(s) Completed, Editorial Evaluation Pending
28 Dec 2021Editorial Decision: Revise Major
30 Dec 20212nd Revision Received
31 Dec 2021Submission Checks Completed
31 Dec 2021Assigned to Editor
01 Jan 2022Reviewer(s) Assigned
01 Jan 2022Review(s) Completed, Editorial Evaluation Pending
03 Jan 2022Editorial Decision: Accept
19 Jan 2022Published in Fatigue & Fracture of Engineering Materials & Structures. 10.1111/ffe.13656