Fatigue crack growth rates of rotor steel at elevated temperatures

Low fatigue samples were obtained from the outer edges of rotor steel （30CrlMolV） which had operated under different temperatures conditions. Based on this data, the effects of temperature on fatigue crack growth rates were investigated. This paper presents a derivation of the superposition expressi...

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Bibliographic Details
Published in:Journal of marine science and application 2008-06, Vol.7 (2), p.143-146
Main Author: 刘长海 马丽娟 唐立强
Format: Article
Language:English
Subjects:
Chromium molybdenum vanadium steels
Constants
Crack propagation
Derivation
Electrical Machines and Networks
Engineering
Fatigue failure
Fracture mechanics
Geotechnical Engineering & Applied Earth Sciences
Machinery and Machine Elements
Marine
Offshore Engineering
Power Electronics
Rotors
Steam turbines
Steels
传播率
疲劳裂纹
转子钢
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Summary:Low fatigue samples were obtained from the outer edges of rotor steel （30CrlMolV） which had operated under different temperatures conditions. Based on this data, the effects of temperature on fatigue crack growth rates were investigated. This paper presents a derivation of the superposition expression of two natural logarithms governing crack growth rates and also discusses the relationship between a material’s constants and temperature. These results can provide experimental and theoretical references for fatigue life design of rotor steel in steam turbines.
ISSN:1671-9433
1993-5048
DOI:10.1007/s11804-008-7070-4