Orientation dependence of creep of Ni{sub 3}Al at intermediate temperature

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00074-3· OSTI ID:644308

Zhu, W H; Fort, D; Jones, I P; Smallman, R E ^[1]

---

1. Univ. of Birmingham (United Kingdom)

The orientation dependence of creep of single crystal Ni{sub 3}Al (1 at.% Ta) has been investigated at an intermediate temperature of 520 C and at a stress of 550 MPa. Steady-state creep was observed for all orientations. The higher the resolved shear stress on the cube cross-slip plane, the larger the steady-state creep rate. Surface slip line and TEM analysis confirmed that for most orientations the dislocations glide on the primary octahedral plane(s) during the primary stage but glide on the cube cross-slip plane(s) during the secondary stage. For the [{bar 1}1 12] orientation, however, the dislocations remain on the octahedral planes.

• OSTI ID: 644308
• Report Number(s): CONF-9704224-; ISSN 1359-6454; TRN: IM9824%%181
• Journal Information: Acta Materialia, Vol. 46, Issue 11; Conference: Workshop on coupled property issues in integrated microstructures, Monterey, CA (United States), 4-7 Apr 1997; Other Information: PBD: 1 Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CREEP
NICKEL ALLOYS
ALUMINIUM ALLOYS
INTERMETALLIC COMPOUNDS
MONOCRYSTALS
ORIENTATION
TEMPERATURE RANGE 0400-1000 K
SLIP
DISLOCATIONS