NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effects of fine porosity on the fatigue behavior of a powder metallurgy superalloyHot-isostatically-pressed powder-metallurgy Astroloy was obtained which contained 1.4 percent porosity at the grain boundaries produced by argon entering the powder container during pressing. This material was tested at 650 C in fatigue, creep-fatigue, tension, and stress-rupture and the results compared with data on sound Astroloy. They influenced fatigue crack initiation and produced a more intergranular mode of propagation but fatigue life was not drastically reduced. Fatigue behavior of the porous material showed typical correlation with tensile behavior. The plastic strain range-life relation was reduced proportionately with the reduction in tensile ductility, but the elastic strain range-life relation was changed little.
Document ID
19800051325
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Miner, R. V.
(NASA Lewis Research Center Cleveland, OH, United States)
Dreshfield, R. L.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
February 1, 1980
Subject Category
Metallic Materials
Meeting Information
Meeting: Metallurgical and Petroleum Engineers, Annual Meeting
Location: Las Vegas, NV
Start Date: February 25, 1980
End Date: February 28, 1980
Sponsors: American Institute of Mining
Accession Number
80A35495
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available