About this Abstract |
Meeting |
Superalloys 2021
|
Symposium
|
Superalloys 2021
|
Presentation Title |
Development of AGAT, a 3rd Generation Nickel Based Superalloy for Single Crystal Turbine Blade Applications |
Author(s) |
Jeremy Rame, Pierre Caron, Virginie Jaquet, Didier Locq, Odile Lavigne, Mikael Perrut, Joël Delautre, Lorena Mataveli Suave, Amar Saboundji, Jean-Yves Guedou |
On-Site Speaker (Planned) |
Jeremy Rame |
Abstract Scope |
The new third generation single crystal superalloy AGAT has been developed for aircraft engine turbine blade applications. Alloy design procedure is described and AGAT alloy properties are presented and compared with those of respectively 1st, 2nd and 3rd generation AM1, CMSX-4 and CMSX-10 alloys. AGAT alloy exhibits high creep resistance at very high temperature (1200 °C) compared with 1st and 2nd generation superalloys while maintaining moderate density (8870 kg·m-3) and stable microstructure unlike the 3rd generation superalloy. High cycle fatigue (HCF) and low cycle fatigue (LCF) properties of AGAT alloy are similar to 2nd generation CMSX-4 alloy. AGAT solution heat treatment allows suppressing the ã/ã’ interdendritic eutectic pools at a temperature 30 °C lower than for CMSX-10 with a shorter duration. Oxidation resistance of AGAT alloy at 1150 °C is lower than that of 2nd but higher than that of 3rd generation reference superalloys. AGAT shows low sensitivity to secondary reaction zone (SRZ) formation under b-NiPtAl bond coat (BC) and great spallation resistance of YPSZ EB-PVD thermal barrier coating (TBC) compared with reference alloys. Finally, single crystal turbine blades were successfully manufactured through industrial processes to be tested in engine conditions. |
Proceedings Inclusion? |
Undecided |