Alloys for a liquid metal fast breeder reactor
- Oak Ridge, TN
- Mt. Lebanon, PA
- Monroeville, PA
- Youngwood, PA
An essentially gamma-prime precipitation-hardened iron-chromium-nickel alloy has been designed with emphasis on minimum nickel and chromium contents to reduce the swelling tendencies of these alloys when used in liquid metal fast breeder reactors. The precipitation-hardening components have been designed for phase stability and such residual elements as silicon and boron, also have been selected to minimize swelling. Using the properties of these alloys in one design would result in an increased breeding ratio over 20% cold worked stainless steel, a reference material, of 1.239 to 1.310 and a reduced doubling time from 15.8 to 11.4 years. The gross stoichiometry of the alloying composition comprises from about 0.04% to about 0.06% carbon, from about 0.05% to about 1.0% silicon, up to about 0.1% zirconium, up to about 0.5% vanadium, from about 24% to about 31% nickel, from 8% to about 11% chromium, from about 1.7% to about 3.5% titanium, from about 1.0% to about 1.8% aluminum, from about 0.9% to about 3.7% molybdenum, from about 0.04% to about 0.8% boron, and the balance iron with incidental impurities.
- DOE Contract Number:
- E(11-1)-3045
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4172742
- OSTI ID:
- 863443
- Country of Publication:
- United States
- Language:
- English
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Precipitation hardenable iron-nickel-chromium alloy having good swelling resistance and low neutron absorbence
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