Fission-fusion correlations for swelling and microstructure in stainless steels: effect of the helium-to-displacement-per-atom ratio

Conference · Thu Jan 01 00:00:00 EST 1981

OSTI ID:6807354

Odette, G R; Maziaz, P J; Spitznagel, J A

The initial irradiated structural materials data base for fusion applications will be developed in fission reactors. Hence, this data may need to be adjusted using physically-based procedures to represent behavior in fusion environments, viz. - fission-fusion correlations. Such correlation should reflect a sound mechanistic understanding, and be verified in facilities which most closely simulate fusion conditions. In this paper we review the effects of only one of a number of potentially significant damage variables, the helium to displacement per atom ratio, on microstructural evolution in austenitic stainless steels. Dual-ion and helium preinjection data are analyzed to provide mechanistic guidance; these results appear to be qualitatively consistent with a more detailed comparison made between fast (EBR-II) and mixed (HFIR) spectrum neutron data for a single heat of 20% cold-worked 316 stainless steel. These two fission environments bound fusion (He/dpa ratios. A model calibrated to the fission reactor data is used to extrapolate to fusion conditions. Both the theory and broad empirical observation suggest that helium to dpa ratios have both a qualitative and quantitative influence on microstructural evolution; and that the very high and low ratios found in HFIR and EBR-II may not result in behavior which brackets intermediate fusion conditions.

• Research Organization: California Univ., Santa Barbara (USA); Oak Ridge National Lab., TN (USA); Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6807354
• Report Number(s): CONF-810831-98-Draft; ON: DE82020938
• Resource Relation: Conference: Fusion reactor materials meeting, Seattle, WA, USA, 9 Aug 1981; Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
STAINLESS STEEL-316
MICROSTRUCTURE
PHYSICAL RADIATION EFFECTS
SWELLING
DISPLACEMENT RATES
FISSION
HELIUM
NEUTRON REACTIONS
TEST REACTORS
THERMONUCLEAR REACTOR MATERIALS
ALLOYS
BARYON REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
FLUIDS
GASES
HADRON REACTIONS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
RADIATION EFFECTS
RARE GASES
REACTORS
RESEARCH AND TEST REACTORS
STAINLESS STEELS
STEELS
360103* - Metals & Alloys- Mechanical Properties
700209 - Fusion Power Plant Technology- Component Development & Materials Testing