Hydrogen in titanium alloys
The titanium alloys that offer properties worthy of consideration for fusion reactors are Ti-6Al-4V, Ti-6Al-2Sn-4Zr-2Mo-Si (Ti-6242S) and Ti-5Al-6Sn-2Zr-1Mo-Si (Ti-5621S). The Ti-6242S and Ti-5621S are being considered because of their high creep resistance at elevated temperatures of 500/sup 0/C. Also, irradiation tests on these alloys have shown irradiation creep properties comparable to 20% cold worked 316 stainless steel. These alloys would be susceptible to slow strain rate embrittlement if sufficient hydrogen concentrations are obtained. Concentrations greater than 250 to 500 wppm hydrogen and temperatures lower than 100 to 150/sup 0/C are approximate threshold conditions for detrimental effects on tensile properties. Indications are that at the elevated temperature - low hydrogen pressure conditions of the reactors, there would be negligible hydrogen embrittlement.
- Research Organization:
- McDonnell Douglas Astronautics Co., St. Louis, MO (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AS02-77ET52039
- OSTI ID:
- 6420120
- Report Number(s):
- DOE/ET/52039-2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
ABSORPTION
ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DIFFUSION
ELEMENTS
EMBRITTLEMENT
HYDROGEN
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
NONMETALS
PERMEABILITY
SOLUBILITY
STAINLESS STEELS
STEELS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS