Hydrogen attack of bainitic 2 1/4 Cr-1 Mo steel
Conference
·
OSTI ID:5228194
Smooth-bar and notched-bar tensile specimens of normalized and tempered (bainitic) 2 1/4 Cr-1 Mo steel were exposed to hydrogen gas at 5.2 to 27.6 Mpa in the temperature range from 482 to 593/sup 0/C. Polished and etched surfaces as well as fracture surfaces obtained by fracturing the samples at liquid nitrogen temperature were examined for methane bubble formation in the SEM. Tensile tests were performed at room temperature on exposed samples. The formation of bubbles was found to be sensitive to changes in both the temperature and hydrogen pressure for any given exposure time. Applied stress, plastic deformation and longer exposure times all lowered the temperature necessary, at any given pressure, for the formation of bubbles.
- Research Organization:
- Mound Facility, Miamisburg, OH (USA)
- DOE Contract Number:
- AC04-76DP00053
- OSTI ID:
- 5228194
- Report Number(s):
- MLM-2968(OP); CONF-820724-4; ON: DE82019169
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TIME DEPENDENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NONMETALS
STEELS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TIME DEPENDENCE