Hydrogen assisted fracture of sensitized Type 304L austenitic stainless steel
Sensitized specimens of Type 304L stainless steel were tensile tested in atmospheres of hydrogen and helium at high pressure, and in air at ambient pressure. Comparison tensile tests were made with solution-annealed specimens of Type 304L stainless steel in the same atmosphere. When both specimens were tested in high-pressure hydrogen, the sensitized specimens had greater loss in ductility and increased tendency to intergranular fracture. For the sensitized specimens, plastic strain to failure (epsilon/sub p/ = 1n A/sub 0//A/sub f/) in hydrogen at 69 MPa was reduced by 60 to 70% in comparison to similar tests in helium. In addition, a notch with a stress concentration factor of about 3 reduced plastic strain an additional 50 to 60%. In all cases, the nominal tensile strength of Type 304L stainless steel was increased by the notch. There was no evidence of intergranular failure in notched specimens of solution-annealed Type 304L stainless steel tested in high-pressure hydrogen environments.
- Research Organization:
- Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.
- DOE Contract Number:
- EY-76-C-09-0001
- OSTI ID:
- 5589541
- Report Number(s):
- DP-MS-79-61; CONF-800205-5; TRN: 80-007999
- Resource Relation:
- Conference: American Institute of Metallurgical Engineers meeting, Las Vegas, NV, USA, Feb 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROGEN
METALLURGICAL EFFECTS
STAINLESS STEEL-304L
FRACTURE PROPERTIES
CONTROLLED ATMOSPHERES
DUCTILITY
HELIUM
TENSILE PROPERTIES
ALLOYS
ATMOSPHERES
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
NICKEL ALLOYS
NONMETALS
RARE GASES
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties