English, Article edition: ENERGIES 0.16 AND 0.53 eV FOR DISLOCATION RECOVERY IN AlSi11.35Mg0.23 BY POSITRON LIFETIME M. A. ABDEL-RAHMAN; M. S. ABDALLAH; EMAD A. BADAWI

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Bookmark: http://trove.nla.gov.au/version/83996
Physical Description
  • article
Language
  • English

Edition details

Title
  • ENERGIES 0.16 AND 0.53 eV FOR DISLOCATION RECOVERY IN AlSi11.35Mg0.23 BY POSITRON LIFETIME
Author
  • M. A. ABDEL-RAHMAN
  • M. S. ABDALLAH
  • EMAD A. BADAWI
Physical Description
  • article
Notes
  • The recovery behavior of 20% plastically deformed AlSi11.35Mg0.23 in various stages of isochronal annealing is investigated by positron lifetime (LT). Experimental results show that the positron mean lifetime is a function of annealing temperature. The lifetime of the positron annihilating in a perfect lattice is 187.3 ps. It is 229.8 ps in a 20% deformed one. There are two regions in the isochronal annealing, one of them is related to the point defect and the other to the dislocation. The activation enthalpy for the dislocation is calculated from the isothermal study in the dislocation region from 575â675 K by slow and fast cooling and it is 0.16 ± 0.02 and 0.53 ± 0.06 eV, respectively.
  • AlSiMg alloy, positron annihilation, defects, isothermal and isochronal annealing, activation enthalpy
  • RePEc:wsi:srlxxx:v:12:y:2005:i:04:p:519-522
Language
  • English
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