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Which outcome results when the isothermal expansion stage during a closed Brayton cycle reaches the material yield strength?

A)Compressor surges due to backflow
B)Turbine blades experience creep failure
C)Regenerator matrix undergoes phase transition
D)High-pressure component mechanical deformation

💡 Explanation

High-pressure component mechanical deformation occurs because exceeding yield strength facilitates plastic deformation via dislocation slip, causing permanent shape changes; therefore, the physical element is permanently distorted rather than surge/creep or phase change phenomena under normal Brayton operation.

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