In which of the following cases, consideration of creep is important

A Flywheel of steam engine
B Cast iron pipes
C Cycle chains
D Gas turbine blades

Correct Answer: Gas turbine blades

Gas turbine blade is made up of exotic materials superalloys to withstand in the difficult environment inside the gas turbine.
As a consequence of operating the gas turbine at high temperature and high stresses, the turbine blades are subjected to certain deformation (creep).
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