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Effects of irradiation on low-activation ferritic alloys

Technical Report ·
DOI:https://doi.org/10.2172/6423769· OSTI ID:6423769
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The objective of this work is to provide guidance on the applicability of low activation bainitic and martensitic steels for fusion reactor structural components. A series of low activation ferritic alloys has been designed, fabricated, irradiated in MOTA 1B, and tested and examined following irradiation. The series consists of alloys similar to 2-1/4Cr-1Mo with vanadium substituted for molybdenum, alloys similar to 9Cr-1Mo with tungsten and/or vanadium substituted for molybdenum and alloys similar to HT-9 with tungsten and/or vanadium substituted for molybdenum. The results demonstrate that low activation alloys can be successfully produced in the ferritic alloy class. The 2-1/4Cr-V alloys develop excessive irradiation hardening due to precipitation following irradiation at 420/degree/C and the 2-1/4Cr-V and 9Cr-V/W alloys developed excessive softening due to precipitate coarsening and dislocation recovery following irradiation at 585/degree/C. In comparison, the 12Cr-W-V alloy appears to have excellent properties; ..cap alpha..' precipitation at 420/degree/C in-reactor did not significantly increase strength and reasonable strength was maintained after irradiation at 585/degree/C probably in part due to intermetallic precipitate development. 11 refs., 7 figs., 3 tabs.
Research Organization:
Hanford Engineering Development Lab., Richland, WA (USA)
DOE Contract Number:
AC06-76FF02170
OSTI ID:
6423769
Report Number(s):
HEDL-7513; ON: DE89010149
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360106* -- Metals & Alloys-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DUCTILITY
FERRITE
HARDENING
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION
MECHANICAL PROPERTIES
MICROSTRUCTURE
PHASE STABILITY
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATION HARDENING
STABILITY
SWELLING
TENSILE PROPERTIES
VANADIUM ALLOYS