Freely-migrating defect production during irradiation at elevated temperature

Technical Report · Sun Mar 01 04:00:00 EST 1987

OSTI ID:6481001

Hashimoto, T; Rehn, L E; Okamoto, P R

Radiation-induced segregation in a Cu-lat.% Au alloy was investigated using in situ Rutherford Backscattering Spectrometry. The amount of Au atom depletion in the near surface region was measured as a function of dose during irradiation at 350/degree/C with four ions of substantially different masses. Relative efficiencies for producing freely-migrating defects were evaluated for 1.8 MeV /sup 1/H, /sup 4/He, /sup 20/Ne and /sup 84/Kr ions by determining beam current densities that gave similar radiation-induced segregation rates. Irradiations with primary knock-on atom median energies of 1.7, 13 and 79 keV yielded relative efficiencies of 53, 7 and 6%, respectively, compared to the irradiation with a 0.83 keV median energy. Despite quite different defect and host alloy properties, the relative efficiencies for producing freely-migrating defects determined in Cu-Au are remarkably similar to those found previously in Ni-Si alloys. Hence, the reported efficiencies appear to offer a reliable basis for making quantitative correlations of microstructural changes induced in different alloy systems by a wide variety of irradiation particles. 27 refs., 9 figs., 3 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6481001
• Report Number(s): ANL/PPRNT-89-151; ON: DE89008336
• Country of Publication: United States
• Language: English

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ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
CURRENT DENSITY
DEFECTS
EFFICIENCY
ELASTIC SCATTERING
EVEN-EVEN NUCLEI
GOLD ALLOYS
HELIUM 4
HELIUM ISOTOPES
HIGH TEMPERATURE
HYDROGEN 1
HYDROGEN ISOTOPES
INTERMEDIATE MASS NUCLEI
IRRADIATION
ISOTOPES
KRYPTON 84
KRYPTON ISOTOPES
LIGHT NUCLEI
MICROSTRUCTURE
NEON 20
NEON ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
RUTHERFORD SCATTERING
SCATTERING
STABLE ISOTOPES