Abstract
The characteristics of microstructural evolution along the transverse axis of the 1/3 position of turbine blade body have been investigated with the help of transmission electron microscopy. Dislocation configurations change with the evolution of local stress from the leading edge to the trailing edge: slip bands → dislocations → only γ/γ′ structure → dislocations → slip bands. The formation mechanism of slip bands illustrates that dislocations are generated in pairs and glide on the same plane continuously. Finite element analysis is made to assess the stress distribution along the transverse axis of turbine blade body. The instantaneous and inhomogeneous stress at the leading and trailing edges of blade body becomes the driving force for the formation of slip bands.
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