Hydrogen environment embrittlement of turbine disk alloysAstroloy and V-57, two candidate turbine disk alloys for the auxiliary power unit (APU) of the space shuttle propulsion and power system were tested for their resistance to embrittlement in hydrogen environments. Samples of both these nickel-base alloys were subjected to notch and smooth tensile testing and to creep testing in hydrogen. The high resistance exhibited by Astroloy forgings to embrittlement by hydrogen is attributed to the microstructure produced by forging and also to the special heat treatment schedule. V-57 turbine disks successfully completed short-time performance testing in the experimental APU. The use of the Astroloy, however, would permit increasing turbine inlet temperature and the rotational speed beyond those possible with V-57.
Document ID
19760063545
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Gray, H. R. (NASA Lewis Research Center Cleveland, OH, United States)
Joyce, J. P. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Metallic Materials
Meeting Information
Meeting: Effect of hydrogen on behavior of materials