Reduction of irradiation-induced creep and swelling in AISI 316 by compositional modifications
Studies involving high fluence irradiations of compositionally modified AISI 316 stainless steel have demonstrated that the irradiation-induced creep and swelling of this alloy can be modified through a selective choice of alloying elements. Irradiation-induced swelling of specimens irradiated to fluences of 7 to 12 x 10/sup 22/ n/cm/sup 2/ (E > 0.1 MeV) is strongly influenced by the concentration of alpha-stabilizing elements such as Si and Mo. Relative minima and maxima in swelling vs composition diagrams are shown to exist. Irradiation-induced creep strain of AISI 316 is, in general, reduced by the same elements which reduce irradiation-induced swelling. It was found that the compositional dependence of swelling and creep in this alloy system can both be described through a description of the screening of dislocation strain fields. Compositional modifications which increase the mobility of the screening agents or allow the formation of more effective screening agents will decrease the swelling and irradiation creep. This screening results in a decrease in the interstitial-dislocation bias, which results in lower swelling and in reactor creep.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC14-76FF02170
- OSTI ID:
- 5311657
- Report Number(s):
- HEDL-SA-1512-FP; CONF-800609-7
- Country of Publication:
- United States
- Language:
- English
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Reduction of irradiation-induced creep and swelling in AISI 316 by compositional modifications
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Related Subjects
36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MOLYBDENUM
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
REFRACTORY METALS
SEMIMETALS
SILICON
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SWELLING
TRANSITION ELEMENTS
360106* -- Metals & Alloys-- Radiation Effects
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MOLYBDENUM
MOLYBDENUM ALLOYS
NICKEL ALLOYS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
REFRACTORY METALS
SEMIMETALS
SILICON
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
SWELLING
TRANSITION ELEMENTS