Fracture surface micromorphology of Inconel X-750 at room temperature and elevated temperatures
The fracture surface micromorphology of Inconel X-750 has been examined in order to relate operative fracture mechanisms to key microstructural features. Under room temperature and intermediate temperature (approximately 600/sup 0/F) conditions, failure occurred primarily by an intergranular dimple rupture mechanism associated with microvoid coalescence along a grain boundary denuded region. At progressively higher temperatures an intergranular to transgranular fracture mechanism transition was detected. In the 1000 to 1300/sup 0/F regime, the Inconel X-750 fracture surfaces were dominated by a faceted transgranular morphology. This faceted appearance was attributed to extensive heterogeneous planar slip, characteristic of many nickel-base superalloys.
- Research Organization:
- Hanford Engineering Development Lab., Richland, Wash. (USA)
- DOE Contract Number:
- EY-76-C-14-2170
- OSTI ID:
- 5348630
- Report Number(s):
- HEDL-TME-77-64
- 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
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
FAILURES
FRACTURE PROPERTIES
GRAIN BOUNDARIES
HIGH TEMPERATURE
INCONEL ALLOYS
INCONEL X750
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
TITANIUM ALLOYS