NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Anisotropy of nickel-base superalloy single crystalsThe effects of crystal orientation on the mechanical properties of single crystals of the nickel-based superalloy Mar-M247 are investigated. Tensile tests at temperatures from 23 to 1093 C and stress rupture tests at temperatures from 760 to 1038 C were performed for 52 single crystals at various orientations. During tensile testing between 23 and 760 C, single crystals with high Schmid factors were found to be favorably oriented for slip and to exhibit lower strength and higher ductility than those with low Schmid factors. Crystals which required large rotations to become oriented for cross slip were observed to have the shortest stress rupture lives at 760 C, while those which required little or no rotation had the longest lives. In addition, stereographic triangles obtained for Mar-M247 and Mar-M200 single crystals reveal that crystals with orientations near the -111 had the highest lives, those near the 001 had high lives, and those near the 011 had low lives.
Document ID
19800067403
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mackay, R. A.
(Case Western Reserve Univ. Cleveland, OH, United States)
Maier, R. D.
(Case Western Reserve University Cleveland, Ohio, United States)
Dreshfield, R. L.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
September 1, 1980
Subject Category
Metallic Materials
Accession Number
80A51573
Funding Number(s)
CONTRACT_GRANT: NSG-3246
Distribution Limits
Public
Copyright
Other

Available Downloads

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