Hydrogen attack of bainitic 2 1/4 Cr-1 Mo steel
Journal Article
·
· Microstruct. Sci.; (United States)
OSTI ID:5999037
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 593C. 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 scanning electron microscope (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. 18 references, 10 figures, 2 tables.
- Research Organization:
- Mound Facility, Miamisburg, OH
- DOE Contract Number:
- AC04-76DP00053
- OSTI ID:
- 5999037
- Journal Information:
- Microstruct. Sci.; (United States), Journal Name: Microstruct. Sci.; (United States) Vol. 11; ISSN MSSCD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BAINITE
BUBBLES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
ELEMENTS
HIGH TEMPERATURE
HYDRIDATION
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
METALLOGRAPHY
NONMETALS
PRESSURE EFFECTS
STEELS
TEMPERATURE EFFECTS
360102 -- Metals & Alloys-- Structure & Phase Studies
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BAINITE
BUBBLES
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
ELEMENTS
HIGH TEMPERATURE
HYDRIDATION
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
METALLOGRAPHY
NONMETALS
PRESSURE EFFECTS
STEELS
TEMPERATURE EFFECTS