Steam and Gas Turbines are in a wide variety of sizes and have a wide range of products. Steam turbines are the most important power generation elements in thermal power plants. In addition, gas turbines are generally used in combined cycle power plants. The desired situation in steam and gas turbines is to be as efficient as possible and to emit less carbon emission by using low fuel. Improvements in blade design of turbines and operation at optimum temperature increase the thermal efficiency of steam turbines. Advanced cooling strategies and developments in combustion technologies have enabled industrial gas turbines to increase their efficiency.