Ratcheting and low cycle fatigue behavior of SA333 steel and their life prediction

Ratcheting and low cycle fatigue (LCF) experiments have been conducted at 25 °C temperature in laboratory environment under different loading conditions. SA333 steel exhibits cyclic hardening throughout its life during LCF. It is found that ratcheting strain increases with both increasing mean stres...

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Bibliographic Details
Published in:Journal of nuclear materials 2010-06, Vol.401 (1), p.17-24
Main Authors: Paul, Surajit Kumar, Sivaprasad, S., Dhar, S., Tarafder, S.
Format: Article
Language:English
Subjects:
Amplitudes
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Low cycle fatigue
Mathematical analysis
Nuclear fuels
Plastic strain
Ratcheting
Serrated yielding
Strain
Stresses
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Summary:Ratcheting and low cycle fatigue (LCF) experiments have been conducted at 25 °C temperature in laboratory environment under different loading conditions. SA333 steel exhibits cyclic hardening throughout its life during LCF. It is found that ratcheting strain increases with both increasing mean stress and stress amplitude. It has also been noticed that plastic strain amplitude and plastic strain energy decrease with increase in mean stress at constant stress amplitude. Ratcheting and LCF life in the range of 10 2–10 5 cycles have been predicted with the help of a mean stress-based fatigue lifing equation.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2010.03.014