Method of testing thermal aging of materials under stress
In this paper an investigation was undertaken of the combined influence of elevated temperatures and stresses on the tendency of Cr-Ni-Mo-V steel, used for the fabrication of nuclear reactor housings, to brittle fracture. A method of testing materials under thermal aging and stress is proposed and an installation is produced that permits giving and maintaining a stress level to 600 MPa and a temperature to 500/sup 0/C with high accuracy in a blank with an aging duration up to 5000 h. A dependence of the shift in the critical brittleness temperature of Cr-Ni-Mo-V steel on the time of thermal aging under stress is obtained by using the installation mentioned. It is shown that the 300 MPa stresses applied accelerate the thermal aging process 2-3 times; however, the magnitude of the shift in the critical brittleness temperature and the nature of its change with aging time upon the superposition of static stresses (in the elastic domain) do not change in practice.
- Research Organization:
- NPO TsNIITMash, Moscow (USSR)
- OSTI ID:
- 6911339
- Journal Information:
- Ind. Lab. (Engl. Transl.); (United States), Journal Name: Ind. Lab. (Engl. Transl.); (United States) Vol. 53:4; ISSN INDLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220200 -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
CRACK PROPAGATION
EMBRITTLEMENT
FATIGUE
FRACTURE PROPERTIES
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
NICKEL ALLOYS
REACTOR COMPONENTS
STEELS
STRESS ANALYSIS
STRESSES
TEMPERATURE EFFECTS
TEST FACILITIES
TESTING
THERMAL CYCLING
THERMAL DEGRADATION
THERMAL FATIGUE
THERMAL STRESSES
VANADIUM ALLOYS