期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 62, 期 -, 页码 62-66出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2013.10.011
关键词
Low cycle fatigue; Thermo mechanical fatigue; Life prediction
资金
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2012M2A8A1029423, 2011-0020024]
- National Research Foundation of Korea [2012M2A8A1029423] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Gas turbine blades are exposed to high-temperature degradation environments due to flames and mechanical loads as a results of high-speed rotation during operation. In addition, blades are exposed to thermo-mechanical fatigue due to frequent start and shutdown. Therefore, it is necessary to evaluate the lifetime of blade materials. In this study, the TMF life of a Ni-base superalloy applied to gas turbine blade was predicted based on LCF and TMF test results. The LCF tests were conducted under various strain ranges based on gas turbine operating conditions. In addition, IP (in-phase) and OP (out of-phase) TMF tests were conducted under various strain ranges. Finally, a fatigue life prediction model was drawn from the LCF and TMF test results. The correlation between the LCF and TMF test results was also evaluated with respect to fatigue life. (C) 2013 Elsevier Ltd. All rights reserved.
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