English, Article edition: GRAIN SIZE IN CASTING AND WROUGHT Al-ALLOYS BY POSITRON LIFETIME TECHNIQUE M. A. ABDEL-RAHMAN; R. M. ABDEL-LATIF; M. S. ABDALLAH; ...

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Physical Description
  • article
Language
  • English

Edition details

Title
  • GRAIN SIZE IN CASTING AND WROUGHT Al-ALLOYS BY POSITRON LIFETIME TECHNIQUE
Author
  • M. A. ABDEL-RAHMAN
  • R. M. ABDEL-LATIF
  • M. S. ABDALLAH
  • EMAD A. BADAWI
Physical Description
  • article
Notes
  • Positron behavior at grain boundaries is characterized by their bulk diffusibility D, their bulk free lifetime Ïf and their trapped lifetime Ït(Ït > Ïf). AlSi11.35Mg0.23, AlSi10.9Mg0.17Sr0.06, 7075 and 2024 alloys have been homogenized at 673 K for 12 hours. The mean lifetime, as (indirectly) measured at various strains (degrees of deformation), show a good fitting with a FORTRAN program. Ïf and Ït for the above materials are shown as: (187.3 ± 0.10, 229.7 ± 0.10), (198.0 ± 0.10, 230.3 ± 0.10), (205.4 ± 0.05, 213.4 ± 0.06) and (197.1 ± 0.55, 215.2 ± 0.57) Ps respectively. The mean lifetime was found to vary exponentially with the degree of deformation.
  • Casting and wrought alloys, PLT and grain size
  • RePEc:wsi:srlxxx:v:12:y:2005:i:02:p:197-202
Language
  • English
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