The effect of hydrogen isotopes and helium on the tensile properties of 21-6-9 stainless steel
High-energy-rate-forged (HERF) stainless steels are used as the materials of construction for pressure vessels designed for the containment of hydrogen and its isotopes. Hydrogen and helium, the decay product of tritium, are known to embrittle these materials. HERF stainless steels have a relatively good resistance to hydrogen-and-helium-induced embrittlement when compared to annealed stainless steels due to their high number density of dislocations, which act as traps for hydrogen and helium. However, the degree of embrittlement in these materials can vary considerably because of microstructure and yield strength variations introduced during the forging process. In this study the effect of hydrogen and tritium on the tensile properties of 21-6-9 stainless steel was measured as a function of HERF yield strength in the range of 660 to 930 MPa. The effect of microstructure was studied also be conducting tensile tests with HERF and annealed samples.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 10136895
- Report Number(s):
- WSRC-MS--90-82; CONF-9004146--10; ON: DE92010700
- Country of Publication:
- United States
- Language:
- English
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The effects of hydrogen isotopes and helium on the tensile properties of 21-6-9 stainless steel
The effects of hydrogen isotopes and helium on the tensile properties of 21-6-9 stainless steel