ALTERNATE MATERIAL FOR ELEVATED TEMPERATURE TURBINE COOLING PLATE APPLICATIONS

Extrude+ isoforged Ni-base powder alloy Rene104 was initially developed for critical rotating applications subject to elevated temperature for extended periods. The excellent dwell fatigue behavior and metallurgical stability makes this a viable candidate for material upgrade to improve the durability of non-critical turbine engine components that encounter severe operating conditions. This program was performed to address distress and metallurgical changes observed after field service of rotor cooling plates in aircraft turbine engines. Temperature capability is a key factor affecting hardware durability as commercial engine design temperatures and take-off cycle severity continues to climb.