Astudy on life prediction of low cycle fatigue in superalloy for gas turbine blades

A more accurate life prediction for gas turbine blade takes into account the material behaviour under the Low Cycle Fatigue cycles normally encountered in turbine operation. In this study, low cycle fatigue tests are performed as the variables of total strain range and temperatures. The relations be...

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Bibliographic Details
Published in:Procedia engineering 2011, Vol.10, p.1997-2002
Main Authors: Kim, Jae-Hoon, Yang, Ho-Young, Yoo, Keun-Bong
Format: Article
Language:English
Subjects:
Coffin-Manson Method
Elevated Temperature
Low Cycle Fatigue
Ni-based Superalloy
Strain Energy Method
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Summary:A more accurate life prediction for gas turbine blade takes into account the material behaviour under the Low Cycle Fatigue cycles normally encountered in turbine operation. In this study, low cycle fatigue tests are performed as the variables of total strain range and temperatures. The relations between plastic and total strain energy densities and number of cycles to failure are examined in order to predict the low cycle fatigue life of superalloy at different temperatures. The fatigue lives that are predicted by Coffin-Manson method and strain energy methods are compared with the measured fatigue lives at different temperatures.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2011.04.331