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

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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 ... continued below

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Pages: 28

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Hashimoto, T.; Rehn, L.E. & Okamoto, P.R. April 1, 1986.

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Description

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.

Physical Description

Pages: 28

Notes

NTIS, PC A03/MF A01; 1.

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  • 13. international symposium on the effects of radiation on materials, Seattle, WA, USA, 23 Jun 1986

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  • Other: DE86014492
  • Report No.: CONF-860605-19
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5587586
  • Archival Resource Key: ark:/67531/metadc1092460

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • April 1, 1986

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 6, 2018, 5:42 p.m.

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Hashimoto, T.; Rehn, L.E. & Okamoto, P.R. Radiation-induced segregation in Cu-Au alloys. [1 at. % Au], article, April 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1092460/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.