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Damage‐based low‐cycle fatigue lifetime prediction of nickel‐based single‐crystal superalloy considering anisotropy and dwell types
Author(s) -
Zhang Bin,
Wang Rongqiao,
Hu Dianyin,
Jiang Kanghe,
Hao Xinyi,
Mao Jianxing,
Jing Fulei
Publication year - 2020
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13345
Subject(s) - materials science , dwell time , superalloy , anisotropy , creep , ultimate tensile strength , low cycle fatigue , slip (aerodynamics) , nickel , composite material , structural engineering , metallurgy , microstructure , thermodynamics , engineering , optics , medicine , clinical psychology , physics
Based on the physical phenomenon that the fatigue cracks initiate along specific slip plane, a slip plane damage‐based low‐cycle fatigue (LCF) lifetime model for the nickel‐based single‐crystal superalloy is established. The predicted results indicate that the lifetime model can reflect the orientation effect. In addition, in order to characterize the dwell‐time dependence of the LCF lifetime, creep damage and compression‐creep damage are introduced to the lifetime model. Finally, the lifetime predictions under LCF loading with tensile dwell time, compressive dwell time and tensile‐compressive dwell time are conducted by employing the lifetime model, respectively. The predicted lifetimes show a good agreement with the experimental data, which verifies the accuracy of the developed lifetime model in this paper.