The following property is most important for material used for gas turbine blade

The following property is most important for material used for gas turbine blade Correct Answer Creep

In the context of gas turbine blades, the most important property among the given options is Creep. Creep is a time-dependent deformation that occurs under constant load and elevated temperatures. Gas turbine blades operate in high-temperature environments and are subjected to significant mechanical and thermal stresses.

Explanation for each option:

Toughness: While toughness is important for impact resistance, it is not as critical as creep in the high-temperature and constant-load conditions experienced by gas turbine blades.
Fatigue: Fatigue is relevant for cyclic loading, but the continuous and high-temperature operation of gas turbine blades makes creep a more crucial consideration.
Creep: Creep resistance is crucial as gas turbine blades are exposed to prolonged high temperatures and constant loads during operation.
Corrosion resistance: While corrosion resistance is important for durability, it is not the primary concern when compared to the high-temperature creep behavior.

Therefore, in the context of the question, the most important property for a material used for gas turbine blades is Creep.