SEDL / STP / STP955-EB / STP33817S

Neutron-Induced Swelling of Fe-Mn and Fe-Cr-Mn Austenitic Alloys

Garner, FA
Fellow scientist and fellow scientist, Westinghouse Hanford Co., Richland, WA

Brager, HR
Fellow scientist and fellow scientist, Westinghouse Hanford Co., Richland, WA

Pages: 12    Published: Jan 1987

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Abstract

An effort is underway to explore the potential of Fe-Cr-Mn austenitic alloys as substitutes for Fe-Cr-Ni alloys in fusion reactors. This substitution is desired to achieve a reduced level of long-term radioactivity and thereby reduce the cost and safety hazards associated with disposal of reactor components at their end of life. Neutron-induced swelling data to 50 dpa are now available at 520°C for three reduced activation alloy series and for lower exposures at 420 and 600°C. These three series cover simple binary and ternary alloys, solute-modified ternaries, and a variety of commercially available Fe-Cr-Mn alloys. The swelling of these alloys is initially similar to that of Fe-Cr-Ni alloys but then changes in response to phase instabilities that develop in the Fe-Cr-Mn system.