Accession Number : AD0700233

Title :   TRENDS IN CHARPY-V SHELF ENERGY DEGRADATION AND YIELD STRENGTH INCREASE OF NEUTRON-EMBRITTLED PRESSURE VESSEL STEELS.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Hawthorne,J. Russell

Report Date : 22 DEC 1969

Pagination or Media Count : 29

Abstract : The effects of neutron irradiation on Charpy-V shelf energy and yield strength was examined for three pressure vessel steel compositions: A302-B, A533, and A543. The effects of radiation exposure at low temperature (<300F (149C)) and at elevated temperature (550F (288 C) to 740F (393C)) on the overall notch ductility are documented and compared. Summary plots showing the simultaneous degradation in shelf energy and the increase of yield strength levels broadly illustrate the progressive change from ductile fracture performance to relatively brittle characteristics. (Author)

Descriptors :   (*NUCLEAR REACTORS, MATERIALS), (*STEEL, *DAMAGE), PRESSURE VESSELS, EMBRITTLEMENT, IMPACT TESTS, NEUTRON REACTIONS, TRANSITION TEMPERATURE, DUCTILITY, TOUGHNESS, TENSILE PROPERTIES, WELDS, (U)WELDS

Subject Categories : Laminates and Composite Materials
      Radioactiv, Radioactive Wastes & Fission Prod
      Fission Reactor Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE