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

AD776540

Publication Date	1973
Personal Author	Smidt, F. A.; Stein, D. F.; Joshi, A.
Page 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)
Keywords	Steel Fracture(Mechanics) Surfaces Spectroscopy Auger electrons Pressure vessels Reactor materials Weldments Embrittlement Radiation effects Auger electron spectroscopy Steel A-302B Steel A-533B
Source Agency	Invalid Source Agency Code
NTIS Subject Category	71J - Iron & Iron Alloys 77J - Reactor Materials
Corporate Authors	Naval Research Lab Washington D C
Document Type	Technical Report
Title Note	Interim rept.
NTIS Issue Number	197411

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

Auger Electron Spectroscopy Analysis of the Fracture Surfaces of Irradiated Pressure-Vessel Steels.
AD776540

Publication Date	1973
Personal Author	Smidt, F. A.; Stein, D. F.; Joshi, A.
Page 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)
Keywords	Steel Fracture(Mechanics) Surfaces Spectroscopy Auger electrons Pressure vessels Reactor materials Weldments Embrittlement Radiation effects Auger electron spectroscopy Steel A-302B Steel A-533B
Source Agency	Invalid Source Agency Code
NTIS Subject Category	71J - Iron & Iron Alloys 77J - Reactor Materials
Corporate Authors	Naval Research Lab Washington D C
Document Type	Technical Report
Title Note	Interim rept.
NTIS Issue Number	197411