Environmental reactions and their effects on mechanical behavior of metallic materials. Technical progress report, February 1, 1979-January 31, 1980
The results of research are presented. Completed results have been obtained in each of three experimental project areas: mechanical behavior of Nb-H and Nb-D alloys; implantation softening of niobium; and the crack path in hydrogen embrittlement of 4340 steel. Results show hydrogen or deuterium softening in niobium is related to the ability of hydrides and deuterides to punch out glissile dislocations; implanted surface layers of oxygen ions in niobium reduce the flow stress at low temperatures; and the hydrogen-assisted crack path in 4340 steel can be identified at electron microscopy resolutions as intergranular, interlath or translath, depending upon the strength level.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (USA). Dept. of Metallurgy and Materials Science
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 5681595
- Report Number(s):
- COO-10359-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRACKS
CRYOGENIC FLUIDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIDES
DEUTERIUM COMPOUNDS
DISLOCATIONS
ELEMENTS
EMBRITTLEMENT
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
ION IMPLANTATION
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONMETALS
STAINLESS STEELS
STEELS
TRANSITION ELEMENT COMPOUNDS
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRACKS
CRYOGENIC FLUIDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEUTERIDES
DEUTERIUM COMPOUNDS
DISLOCATIONS
ELEMENTS
EMBRITTLEMENT
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
ION IMPLANTATION
IRON ALLOYS
IRON BASE ALLOYS
LINE DEFECTS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONMETALS
STAINLESS STEELS
STEELS
TRANSITION ELEMENT COMPOUNDS