Effects of sodium environment on the mechanical properties of Fe-2 1/4Cr-1Mo steel
Mechanical property data on isothermally annealed, thermally aged, and sodium-exposed Fe-2 1/4Cr-1Mo steel are analyzed to evaluate the influence of the sodium environment as well as the effects of the microstructural and compositional changes that occur in the steel during long-term exposure to sodium. Correlations are developed to predict the environmental effects on tensile, creep, fatigue, and creep-fatigue properties of Fe-2 1/4Cr-1Mo steel in sodium. The results indicate that at temperatures < 823 K (550/sup 0/C), degradation of mechanical properties is essentially due to thermal aging. Loss of carbon from the steel reduces both the tensile and creep-rupture strength, but has little or no effect on the fatigue properties. The cyclic properties of Fe-2 1/4Cr-1Mo steel in sodium are superior to those in air. The creep-fatigue behavior in sodium is significantly different from that in an air environment. The creep-fatigue data are analyzed using the interactive damage rate equations to predict the time-dependent fatigue behavior of isothermally annealed Fe-2 1/4Cr-1Mo steel in sodium. 15 references, 7 figures, 1 table.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5400591
- Report Number(s):
- CONF-8310198-4; ON: DE84003611
- Country of Publication:
- United States
- Language:
- English
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36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALKALI METALS
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CREEP
DATA
ELEMENTS
EXPERIMENTAL DATA
FATIGUE
FERRITIC STEELS
FLUIDS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LIQUID METALS
LIQUIDS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
NUMERICAL DATA
SODIUM
STEELS
TENSILE PROPERTIES
ULTIMATE STRENGTH
YIELD STRENGTH