Comparative irradiation study of reactor pressure-vessel steel weld metals

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5616854

Leitz, C; Gerscha, A; Hofmann, G; Strobel, H J

Charpy-V specimens of several test welds made of MnMo, MnCrMo, MnNiMo and MnNiCrMo types were irradiated simultaneously in two series at 315/sup 0/C and 285/sup 0/C, respectively, with neutron fluences between 8 x 10/sup 18/ and 5 x 10/sup 19/ n/cm/sup 2/ (E > 1 MeV). The known influence of copper on the 41 J temperature shift (..delta..T/sub 41/) was clearly detected for variations from 0.08 to about 0.3%. A considerable variation in embrittlement of low copper (below 0.08%) welds was not traceable to copper or phosphorus. Obviously it is related to variations of the nickel content (up to 1.7%). The effects of copper and nickel seem to be independent on each other. Both, however, have an influence on the slope of the ..delta..T/sub 41/ against fluence curves. The effects of other elements as silicon, phosphorus, arsenic, manganese, chromium, molybdenum and of welding procedure and welding flux are discussed in the paper. Due to overlapping, these effects could not be clearly defined. The Charpy-V upper shelf energy drop shows an effect equivalent to overaging. The shelf drop recovers by further irradiation in the region of 1 to 4 x 10/sup 19/ n/cm/sup 2/ for all low copper weld metals except that with 1.7% nickel. The shelf drop sequence of the materials tested is in general similar to ..delta..T/sub 41/ sequence with some differences in detail.

• Research Organization: Kraftwerk Union AG (KWU), Erlangen, Germany
• OSTI ID: 5616854
• Report Number(s): CONF-820628-
• Conference Information: Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: 782
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
ARSENIC
BARYONS
BRITTLE-DUCTILE TRANSITIONS
CHARPY TEST
CHROMIUM
CONTAINERS
COPPER ADDITIONS
COPPER ALLOYS
DESTRUCTIVE TESTING
ELEMENTARY PARTICLES
ELEMENTS
EMBRITTLEMENT
FAST NEUTRONS
FERMIONS
HADRONS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MANGANESE
MATERIALS TESTING
MECHANICAL TESTS
METALS
MOLYBDENUM
NEUTRONS
NONMETALS
NUCLEONS
PHOSPHORUS
PHYSICAL RADIATION EFFECTS
PRESSURE VESSELS
RADIATION EFFECTS
SEMIMETALS
SILICON
STEELS
TESTING
TRANSITION ELEMENTS
WELDED JOINTS