Radiation-induced segregation in Cu-Au alloys. [1 at. % Au]

Conference · Tue Apr 01 00:00:00 EST 1986

OSTI ID:5587586

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

Radiation-induced segregation in a Cu-1 at. % Au alloy was investigated using in situ Rutherford Backscattering Spectrometry. Irradiation with 1.8-MeV He produced nonequilibrium Au atom depletion in the near surface region. The amount of segregation was measured as a function of dose, dose rate and temperature. Segregation was observed between 300 and 500/sup 0/C. For a calculated dose rate of 3.9 x 10/sup -5/ dpa/s, the radiation-induced segregation rate peaked near 400/sup 0/C. Theoretical analysis based on the Johnson-Lam model predicted that the amount of segregation would be directly proportional to dose at the early stage of irradiation, would deviate from linearity with a continuously decreasing slope at intermediate doses, and finally approach a constant value after high doses. The analysis also predicted that the segregation rate would vary as the -1/4th power of the dose rate at constant dose in the low temperature region. These predictions were all verified experimentally. A procedure for extracting relative defect production efficiencies from similar measurements is discussed.

• Research Organization: Argonne National Lab., IL (USA). Materials Science and Technology Div.; Hitachi Ltd., Ibaraki (Japan). Energy Research Lab.
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5587586
• Report Number(s): CONF-860605-19; ON: DE86014492
• Resource Relation: Conference: 13. international symposium on the effects of radiation on materials, Seattle, WA, USA, 23 Jun 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER BASE ALLOYS
PHYSICAL RADIATION EFFECTS
GOLD ALLOYS
BACKSCATTERING
DOSE RATES
HELIUM IONS
HIGH TEMPERATURE
ION BEAMS
MEV RANGE 01-10
RUTHERFORD SCATTERING
SEGREGATION
TEMPERATURE DEPENDENCE
ALLOYS
BEAMS
CHARGED PARTICLES
COPPER ALLOYS
ELASTIC SCATTERING
ENERGY RANGE
IONS
MEV RANGE
RADIATION EFFECTS
SCATTERING
360106* - Metals & Alloys- Radiation Effects