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

Patent · Tue Jan 01 00:00:00 EST 1980

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

Related Subjects

precipitation
hardenable
iron-nickel-chromium
alloy
swelling
resistance
neutron
absorbence
age-hardenable
suitable
fast
breeder
reactor
ducts
cladding
utilizes
gamma-double
prime
strengthening
phase
characterized
morphology
enveloping
gamma-prime
delta
distributed
near
grain
boundaries
consists
essentially
40-50
nickel
5-14
chromium
5-4
niobium
25-0
75
silicon
1-3
titanium
1-0
aluminum
02-0
carbon
002-0
015
boron
balance
iron
manganese
01
magnesium
added
inhibit
trace
element
effects
zirconium
increase
radiation
molybdenum
strength
iron-nickel-chromium alloy
balance iron
trace element
breeder reactor
fast breeder
grain boundaries
consists essentially
swelling resistance
reactor duct
alloy suitable
gamma-double prime
alloy consists
precipitation hardenable
prime phase
strengthening phase
radiation swelling
reactor ducts
chromium alloy
phase enveloping
neutron absorbence
gamma-prime phase
prime strengthening
age-hardenable alloy
iron-nickel-chromium age-hardenable
/148/376/