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The Complex Action of Major Solutes on Radiation-Induced Swelling of Fe-Cr-Ni Austenitic Alloys

Garner, FA
Staff Scientist,Pacific Northwest Laboratory,WA,

Lauritzen, T
Senior Engineer,General Electric Corporation,CA,

Mitchell, MA
Graduate Student,University of Illinois,IL,


Pages: 13    Published: Jan 1994


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Source: STP1175-EB


Abstract

The radiation-induced swelling of simple Fe-Cr-Ni austenitic alloys is known to be very sensitive to solute additions. It is shown in this paper that three of the most common solute elements (P,Si,Mo) exert a very complex and often non-monotonic influence on swelling with increasing solute level. The complexity of this influence and its dependence on other variables appears to be the result of a closely balanced competition between two or more roles played by each solute in its interaction with both vacancies and interstitials. This competition yields a variety of different swelling behaviors in response to changes in solute or solvent composition, displacement rate, and irradiation temperature.


Keywords:
Fe-Cr-Ni alloys, void swelling, atomic size difference, silicon, molybdenum, phosphorus, neutron irradiation, ion irradiation

Paper ID: STP23972S
Committee/Subcommittee: E10.08
DOI: 10.1520/STP23972S
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