Precipitation hardenable iron-nickel-chromium alloy having good swelling resistance and low neutron absorbence

Patent · Mon Dec 31 23:00:00 EST 1979

OSTI ID:863734

Korenko, Michael K ^[1]; Merrick, Howard F ^[2]; Gibson, Robert C ^[3]

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1. Richland, WA
2. Suffern, NY
3. Ringwood, NJ

An iron-nickel-chromium age-hardenable alloy suitable for use in fast breeder reactor ducts and cladding which utilizes the gamma-double prime strengthening phase and characterized in having a morphology of the gamma-double prime phase enveloping the gamma-prime phase and delta phase distributed at or near the grain boundaries. The alloy consists essentially of about 40-50% nickel, 7.5-14% chromium, 1.5-4% niobium, 0.25-0.75% silicon, 1-3% titanium, 0.1-0.5% aluminum, 0.02-0.1% carbon, 0.002-0.015% boron, and the balance iron. Up to 2% manganese and up to 0.01% magnesium may be added to inhibit trace element effects; up to 0.1% zirconium may be added to increase radiation swelling resistance; and up to 3% molybdenum may be added to increase strength.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• DOE Contract Number: E(45-1)-2170
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4236943
• OSTI ID: 863734
• Country of Publication: United States
• Language: English

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/148/376/
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