Room temperature and elevated temperature deformation characteristics of inconel X-750. [Room temperature to 816/sup 0/C]
Thin foil electron microscopy techniques were used to characterize the dislocation behavior of Inconel X-750 tensile specimens tested at temperatures ranging from room temperature of 1500/sup 0/F (816/sup 0/C). Operative dislocation mechanisms were related to the fracture surface morphologies and the overall tensile response of this nickel-base alloy. Under room temperature and intermediate temperature conditions, a rather extensive dislocation substructure throughout the matrix was associated with the ductile response exhibited by Inconel X-750. In the higher temperature regime, approximately 1200 to 1300/sup 0/F (649 to 704/sup 0/C), all dislocation activity was channeled through narrow slip bands which subsequently initiated localized separation and a very faceted fracture surface appearance. The absence of a homogeneous dislocation substructure in this temperature regime resulted in a severe degradation in ductility levels. At the highest test temperature, 1500/sup 0/F (816/sup 0/C), a uniform dislocation network throughout the Inconel X-750 matrix coupled with intense dislocation activity adjacent to the grain boundaries resulted in a marked improvement in ductility.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- EY-76-C-14-2170
- OSTI ID:
- 5805643
- Report Number(s):
- HEDL-TME-79-10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DEFORMATION
DUCTILITY
FAILURES
FRACTURES
INCONEL ALLOYS
INCONEL X750
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MORPHOLOGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
PRECIPITATION
SEPARATION PROCESSES
SURFACES
TENSILE PROPERTIES
TITANIUM ALLOYS
VERY HIGH TEMPERATURE