1. Flywheel of steam engine
  2. Cast iron pipes
  3. Cycle chains
  4. Gas turbine blades
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1 Answers

Answer: Option 4

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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