Reduction of fracture toughness of a low-alloy steel during irradiation

Reduction of fracture toughness of a low-alloy steel during irradiation

The resistance of vessels of water-moderated power reactors to brittle fracture is currently calculated on the basis of the temperature dependence of the fracture toughness or the critical stress intensity factor of the material. One of the possible reasons for the reduction of the minimum level of...

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Veröffentlicht in:Sov. At. Energy (Engl. Transl.); (United States) 1987-05, Vol.62 (5), p.400-403
Hauptverfasser: Nikolaev, V. A., Vinokurov, V. F., Morozov, A. M., Panteleev, V. S., Shamardin, V. K.
Format: Artikel
Sprache:eng
Schlagworte:
210100 - Power Reactors, Nonbreeding, Light-Water Moderated, Boiling Water Cooled
210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled
360103 - Metals & Alloys- Mechanical Properties
360106 - Metals & Alloys- Radiation Effects
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
CONTAINERS
COPPER ADDITIONS
COPPER ALLOYS
CRACK PROPAGATION
FRACTURE PROPERTIES
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS
MATERIALS SCIENCE
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NICKEL ADDITIONS
NICKEL ALLOYS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
REACTOR MATERIALS
REACTOR VESSELS
REACTORS
RELAXATION
RESIDUAL STRESSES
SILICON ADDITIONS
SILICON ALLOYS
SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
STEEL-15KH2MFA
STEELS
STRESS ANALYSIS
STRESS INTENSITY FACTORS
STRESS RELAXATION
STRESSES
TEMPERATURE EFFECTS
TESTING
VANADIUM ADDITIONS
VANADIUM ALLOYS
WATER MODERATED REACTORS
WELDED JOINTS
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Beschreibung
Zusammenfassung:The resistance of vessels of water-moderated power reactors to brittle fracture is currently calculated on the basis of the temperature dependence of the fracture toughness or the critical stress intensity factor of the material. One of the possible reasons for the reduction of the minimum level of this factor which has not been taken into account when analyzing the effects of irradiation is the radiational relaxation of the residual stresses at the tip of the crack grown under conditions of cyclic mechanical loading. The aim of this paper is to test the validity of this assumption. Steels 15Kh2MFA, 15Kh3NMFA-A, and 10KhMFT, the latter used as a welding material, are tested.
ISSN:0038-531X
1573-8205
DOI:10.1007/BF01125197