NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Oxide-dispersion-strengthened turbine blades. Volume 2The overall objective of Project 4 was to develop and test a high-temperature, uncooled gas turbine blade using MA6000 alloy. Production scale up of the MA6000 alloy was achieved with a fair degree of tolerance to non-optimum processing. The blade manufacturing process was also optimized. The mechanical, environmental, and physical property evaluations of MA6000 were conducted. The ultimate tensile strength, to about 704 C (1300 F), is higher than DS MAR-M 247 but with a corresponding lower tensile elongation. Also, above 982 C (1800 F) MA6000 tensile strength does not decrease as rapidly as MAR-M 247 because the ODS mechanism still remains active. Based on oxidation resistance and diffusional stability considerations, NiCrAlY coatings are recommended. CoCrAlY coating should be applied on top of a thin NiCrAlY coating if hot corrosion is expected. Vibration, whirlpit, and high-rotor-rig tests were conducted to ensure successful completion of the engine test of the MA6000 TFE731 high pressure turbine blades. Test results were acceptable. In production quantities, the cost of the Project 4 MA6000 blade is estimated to be twice that of a cast DS MAR-M 247 blade.
Document ID
19890009116
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Millan, P. P., Jr. (Garrett Turbine Engine Co. Phoenix, AZ, United States)
Mays, J. C. (Garrett Turbine Engine Co. Phoenix, AZ, United States)
Humbert, D. R. (Garrett Turbine Engine Co. Phoenix, AZ, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NAS 1.26:179561-VOL-2
NASA-CR-179561-VOL-2
GARRETT-21-5278-2-VOL-2
Accession Number
89N18487
Funding Number(s)
CONTRACT_GRANT: NAS3-20073
PROJECT: RTOP 505-63-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available