Review of fatigue small cracks in key components of gas turbine engines

ZHAO Gaole; QI Hongyu; LI Shaolin; YANG Xiaoguang; SHI Duoqi

doi:10.6052/1000-0992-23-019

Volume 53 Issue 4

Dec. 2023

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Zhao G L, Qi H Y, Li S L, Yang X G, Shi D Q. Review of fatigue small cracks in key components of gas turbine engines. Advances in Mechanics, 2023, 53(4): 819-865 doi: 10.6052/1000-0992-23-019

Citation:

Zhao G L, Qi H Y, Li S L, Yang X G, Shi D Q. Review of fatigue small cracks in key components of gas turbine engines. Advances in Mechanics, 2023, 53(4): 819-865 doi: 10.6052/1000-0992-23-019

Zhao G L, Qi H Y, Li S L, Yang X G, Shi D Q. Review of fatigue small cracks in key components of gas turbine engines. Advances in Mechanics, 2023, 53(4): 819-865 doi: 10.6052/1000-0992-23-019

Citation:

Zhao G L, Qi H Y, Li S L, Yang X G, Shi D Q. Review of fatigue small cracks in key components of gas turbine engines. Advances in Mechanics, 2023, 53(4): 819-865 doi: 10.6052/1000-0992-23-019

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Review of fatigue small cracks in key components of gas turbine engines

doi: 10.6052/1000-0992-23-019

1.
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
2.
Beijing Key Laboratory of Aero-Engine Structure and Strength, Beijing 100191, China

More Information

Corresponding author: lishaolin@buaa.edu.cn
Received Date: 2023-05-31
Accepted Date: 2023-12-20

Available Online: 2023-12-23

Publish Date: 2023-12-30

Abstract

Abstract

The growth behavior of small cracks, as one of the key stages in the fatigue cracking process, significantly affects the fatigue fracture process of materials and structures. Due to the characteristics of rate fluctuation and expansion path deflection, the small crack effect brings uncertainty to the fatigue life prediction results of materials and structures. It brings uncertainty to the fatigue life prediction results of materials and structures. Therefore, it affects the service safety of mechanical structures such as gas turbines. It focuses on the problem of fatigue small crack propagation in key component materials of gas turbine engines. Firstly, a review was conducted on its laws, and impact on the overall life of materials; Subsequently, the initiation and propagation mechanism of small fatigue cracks is deeply revealed based on polycrystalline and single crystal alloys of advanced gas turbine hot section component materials; Once again, corresponding fatigue small crack growth models were summarized, and the advantages and disadvantages of each model were pointed out; Meanwhile, the fatigue small crack growth behavior and models in hot corrosion/oxidation media are reviewed and discussed combined with the working environment of advanced gas turbine hot section components; Finally, the current research on small cracks was summarized and future research trends were proposed. This review aims to provide theoretical support for the design, safety assessment, and life prediction of key components in advanced gas turbines.
- Gas turbine,
- fatigue small crack,
- growth model,
- corrosion fatigue,
- safety assessment,
- life prediction

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References(145)

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