Accession Number : AD0776540

Title :   Auger Electron Spectroscopy Analysis of the Fracture Surfaces of Irradiated Pressure-Vessel Steels.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Smidt,F. A. , Jr. ; Stein,D. F. ; Joshi,A.

Report Date : 21 DEC 1973

Pagination or Media Count : 12

Abstract : Pressure-vessel steels and weldments containing the residual elements copper and phosphorus show a marked tendency toward embrittlement after irradiation at 290C. Auger electron spectroscopy was used to analyze fracture surfaces of these materials to ascertain if segregation of copper and phosphorus during irradiation was responsible for the embrittlement. No evidence of segregation was found. An alternative mechanism is suggested in which the residual elements modify the defect microstructure, with attendant increases in yield strength and ductile-to-brittle transition temperature. (Author)

Descriptors :   *Steel, Fracture(Mechanics), Surfaces, Spectroscopy, Auger electrons, Pressure vessels, Reactor materials, Weldments, Embrittlement, Radiation effects

Subject Categories : Metallurgy and Metallography
      Fission Reactor Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE