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AbstractAbstract
[en] Loss of high temperature ductility due to thermal neutron irradiation was examined by slow strain rate test in vacuum up to 10000C. The results on two heats of Hastelloy alloy X with different boron contents were analyzed with respect to the influence of the temperatures of irradiation and tensile tests, neutron fluence and the associated helium production due to nuclear transmutation reaction. The loss of ductility was enhanced by increasing either temperature or neutron fluence. Simple extrapolations yielded the estimated threshold fluence and the end-of-life ductility values at 900 and 10000C in case where the materials were used in near-core regions of VHTR. The observed relationship between Ni content and the ductility loss has suggested a potential utilization of Fe-based alloys for seathing of the neutron absorber materials
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Source
Brookhaven National Lab., Upton, NY (USA); p. 313-323; 1982; p. 313-323; 3. Japan/US HTGR safety technology seminar; Upton, NY (USA); 2-3 Jun 1982; Available from NTIS, PC A18/MF A01; 1 - GPO as DE84000513
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Report
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Conference
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ALLOY-NI49CR22FE18MO9, AUSTENITIC STEELS, BORON, DUCTILITY, HELIUM, HIGH TEMPERATURE, HTGR TYPE REACTORS, IRON BASE ALLOYS, IRRADIATION, LIFETIME, NEUTRON ABSORBERS, NEUTRON FLUENCE, NICKEL, POST-IRRADIATION EXAMINATION, REACTOR MATERIALS, TENSILE PROPERTIES, THERMAL NEUTRONS, TRANSMUTATION, VERY HIGH TEMPERATURE, VHTR REACTOR
ALLOYS, BARYONS, CARBON ADDITIONS, CHROMIUM ALLOYS, COBALT ALLOYS, CORROSION RESISTANT ALLOYS, ELEMENTARY PARTICLES, ELEMENTS, ENRICHED URANIUM REACTORS, EXPERIMENTAL REACTORS, FERMIONS, GAS COOLED REACTORS, GRAPHITE MODERATED REACTORS, HADRONS, HASTELLOYS, HEAT RESISTING ALLOYS, HELIUM COOLED REACTORS, IRON ALLOYS, MATERIALS, MECHANICAL PROPERTIES, METALS, MOLYBDENUM ALLOYS, NEUTRONS, NICKEL ALLOYS, NICKEL BASE ALLOYS, NONMETALS, NUCLEONS, POWER REACTORS, RARE GASES, REACTORS, RESEARCH AND TEST REACTORS, SEMIMETALS, STEELS, THERMAL REACTORS, TRANSITION ELEMENTS, TUNGSTEN ADDITIONS
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