| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
This study discussed the creep-fatigue life evaluation method for a nickel base single crystal superalloy used in a gas turbine blade. A creep-fatigue life evaluation method was proposed by analyzing the tension-torsion creep-fatigue data and equi-biaxial tension creep-fatigue data. Using the proposed method, a quality assurance method of actual gas turbine blade was developed. The method is to calculate the variation of von Mises stress with time on the critical points of actual gas turbine blades, and the fatigue damage was evaluated by the stress amplitude and creep damage by the frequency of the von Mises stress waveform.
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