Comparative tests of high temperature creep-rupture behavior of the austenitic CrNi steel DIN W.Nr. 1.4970 in argon and steam
Description
With respect to its suitability as alternative cladding material in an Advanced Pressurised Water Reactor (APWR), the austenitic chromium nickel steel DIN No. 1.4970 was subjected to a laboratory investigation of its creep-rupture behavior: In parallel in argon and in steam at 950-1200degC, ca. 10-100 bar, ca. 1 min - 1 h. In comparison to burst tests under inert atmosphere the oxidising material shows slightly reduced strength combined with considerably reduced circumferential burst elongation. Above a strain maximum at about 1100degC the elongations decrease with increasing temperature and duration. The extent and the influence of the oxidation on the mechanical properties is discussed on the basis of the microstructure of the oxide scale. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Der austenitische Chrom-Nickel-Stahl 1.4970 wurde hinsichtlich seiner Eignung als alternatives Huellrohrmaterial fuer einen Fortgeschrittenen Druckwasserreaktor (FDWR) einer Laboruntersuchung seines Kriechberstverhaltens in Argon und unter ueberlagerter Hochtemperaturoxidation in Wasserdampf bei 950-1200degC, ca. 10-100 bar, ca. 1 min - 1 h unterworfen. Im Vergleich zu Bersttests in Schutzgas-Atmosphaere zeigt das oxidierende Material etwas reduzierte Festigkeit bei deutlich geringeren Berst-Umfangsdehnungen. Oberhalb eines Dehnungsmaximums bei ca. 1100degC nehmen die Umfangsdehnungen mit zunehmender Temperatur und Standzeit ab. Das Ausmass und der Einfluss der Oxidation auf die mechanischen Eigenschaften werden auf der Basis mikroskopischer Aufnahmen der gebildeten Oxidschicht diskutiert. (orig.)
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Additional details
Additional titles
- Original title (German)
- Vergleichende Untersuchungen zum Hochtemperatur-Kriechberstverhalten des austenitischen CrNi-Stahls DIN W.Nr. 1.4970 in Argon und Wasserdampf
Publishing Information
- Imprint Pagination
- 48 p.
- Report number
- KFK--4261
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 18084906
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- ARGON; AUSTENITIC STEELS; CREEP; ELONGATION; FUEL CANS; LOSS OF COOLANT; MECHANICAL PROPERTIES; MICROSTRUCTURE; OXIDATION; OXIDES; PWR TYPE REACTORS; RUPTURES; SCALING; SIMULATION; STEAM; STEEL-CR15NI15MOTIB; STRAINS; TEMPERATURE DEPENDENCE; TIME DEPENDENCE; VERY HIGH TEMPERATURE
- Descriptors DEC
- ACCIDENTS; ALLOYS; BORON ADDITIONS; CARBON ADDITIONS; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; CHROMIUM-NICKEL-MOLYBDENUM STE; CORROSION; CORROSION RESISTANT ALLOYS; CRYSTAL STRUCTURE; DEFORMATION; ELEMENTS; ENRICHED URANIUM REACTORS; FAILURES; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MOLYBDENUM ALLOYS; NICKEL ALLOYS; NONMETALS; OXYGEN COMPOUNDS; POWER REACTORS; RARE GASES; REACTOR ACCIDENTS; REACTORS; STAINLESS STEELS; STEELS; THERMAL REACTORS; TITANIUM ADDITIONS; WATER COOLED REACTORS; WATER MODERATED REACTORS