Prediction of low-cycle fatigue life of IN738LC using plastic strain energy density
- Authors
- Wee, S.U.[Wee, S.U.]; Seok, C.S.[Seok, C.S.]; Koo, J.M.[Koo, J.M.]; Lee, J.M.[Lee, J.M.]
- Issue Date
- 2019
- Publisher
- Korean Society for Precision Engineeing
- Keywords
- Gas turbine; Life prediction; Low-cycle fatigue
- Citation
- Journal of the Korean Society for Precision Engineering, v.36, no.4, pp.401 - 406
- Indexed
- SCOPUS
KCI
- Journal Title
- Journal of the Korean Society for Precision Engineering
- Volume
- 36
- Number
- 4
- Start Page
- 401
- End Page
- 406
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/15203
- DOI
- 10.7736/KSPE.2019.36.4.401
- ISSN
- 1225-9071
- Abstract
- Gas turbine blades are important parts of a power plant, and thus, it is necessary to be able to predict the low-cycle fatigue life of the blades. In this study, a low-cycle fatigue test of In738LC, which is used primarily in gas turbine blade manufacture, was performed at various high temperatures (750oC, 800oC, and 850oC). From the test results, the stress-strain curve and the stress-strain hysteresis loop were obtained. It was established that In738LC has no strain hardening or softening. The life prediction equations for low-cycle fatigue were derived using the Coffin-Manson equation and the energy model. In conclusion, one equation for predicting the life low-cycle fatigue was obtained using the energy level with temperature as the varying factor. Copyright © The Korean Society for Precision Engineering
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- Appears in
Collections - Engineering > School of Mechanical Engineering > 1. Journal Articles
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