SYMPOSIA PAPER Published: 01 January 1987
STP33860S

Spinodal-like Decomposition and Swelling Induced by Ion Irradiation in Simple Fe-Ni and Fe-Ni-Cr Alloys

Source

A previously published correlation between the compositional dependence of neutron-induced swelling at high temperatures in Fe-Ni-Cr alloys and the development of compositional micro-oscillations has also been found in this study of swelling induced by 5-MeV Ni+ ion irradiation. The tendency toward decomposition is strongest in the 35 to 45% nickel range and diminishes in the range of 60 to 75% nickel. Chromium appears to play no role other than as a surrogate for iron. The scale of the micro-oscillation appears to be more sensitive to temperature than displacement rate. One consequence of this decomposition is the occasional formation of precipitate phases upon cooling after irradiation. In Fe-35Ni, cellular martensite is found to form after irradiation at 625, 675, and 725°C. In Fe-60Ni-15Cr irradiated at 625°C an ordered phase that may be Ni3(Fe,Cr) is sometimes formed. The fortuitous formation of these phases allows the visualization of the size and spacing of the compositional modulations.

Author Information

Dodd, RA
University of Wisconsin, Madison, WI
Garner, FA
Hanford Engineering Development Laboratory, Richland, WA
Kai, J-J
University of Wisconsin, Madison, WI
Lauritzen, T
General Electric Company, Sunnyvale, CA
Johnston, WG
General Electric Company, Schenectady, NY
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Details
Developed by Committee: E10
Pages: 788–804
DOI: 10.1520/STP33860S
ISBN-EB: 978-0-8031-5016-4
ISBN-13: 978-0-8031-0962-9