Failure and metallurgical defects analysis of IN-738LC gas turbine blades

M. Attarian,Sh. Molaei, H. Shokri, K. Norouzi

Engineering Failure Analysis（2021）

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摘要

•Casting oxide films cause internal discontinuities and cracks and catastrophic failure of blades.•The bottom of airfoil is susceptible to oxide bifilms discontinuities and shrinkage cavities.•Parabolic oxidation rate agree with Arrhenius relationship in estimating blade temperature.

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关键词

Gas turbine blades,Temperature estimation,IN-738LC,γ′ precipitation,MC carbide,Oxidation kinetic,Casting defects

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