Hydrogen embrittlement of niobium III: high-temperature behavior. Technical report. [125 to 500 C, H/Nb < or = 0. 9]
Technical Report
·
OSTI ID:6941343
The deformation behavior in niobium-hydrogen alloys was investigated in the temperature range 125--500 C and at compositions up to H/Nb of 0.9. High temperature tensile tests and fractographic studies were applied to determine the fracture mechanisms. It is shown that at T < or = 450 C and H/Nb > or = 0.3 fracture occurs by a cleavage mode. The mechanism of this high temperature hydrogen embrittlement is discussed. The fracture mechanism is shown to be consistent with the stress induced formation and cleavage of NbH/sub 2/.
- Research Organization:
- Illinois Univ., Urbana (USA). Dept. of Metallurgy and Mining Engineering
- OSTI ID:
- 6941343
- Report Number(s):
- AD-A-047957
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CRYOGENIC FLUIDS
DEFORMATION
DESTRUCTIVE TESTING
ELEMENTS
EMBRITTLEMENT
FAILURES
FLUIDS
FRACTURES
HIGH TEMPERATURE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
KINETICS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONMETALS
PHASE STUDIES
REFRACTORY METALS
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360105* -- Metals & Alloys-- Corrosion & Erosion
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CRYOGENIC FLUIDS
DEFORMATION
DESTRUCTIVE TESTING
ELEMENTS
EMBRITTLEMENT
FAILURES
FLUIDS
FRACTURES
HIGH TEMPERATURE
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
KINETICS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONMETALS
PHASE STUDIES
REFRACTORY METALS
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS