English, Article edition: DETECTING DEFECTS IN AIRCRAFT MATERIALS BY NUCLEAR TECHNIQUE (PAS) EMAD. A. BADAWI

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Bookmark: http://trove.nla.gov.au/version/84882
Physical Description
  • article
Language
  • English

Edition details

Title
  • DETECTING DEFECTS IN AIRCRAFT MATERIALS BY NUCLEAR TECHNIQUE (PAS)
Author
  • EMAD. A. BADAWI
Physical Description
  • article
Notes
  • Positron annihilation spectroscopy (PAS) is one of the nuclear techniques used in material science. The present measurements are used to study the behavior of defect concentration in one of the most important materials aluminum alloys which is the 7075 alloy. It has been shown that positrons can become trapped at imperfect locations in solids and their mean lifetime can be influenced by changes in the concentration of such defects. No changes have been observed in the mean lifetime values after the saturation of defect concentration. The mean lifetime and trapping rates are studied for samples deformed up to 58.3%. The concentration of defect range vary from 1015 to 1018cm-3 at the thickness reduction from 2.3 to 58.3%. The dislocation density varies from 108 to 1011cm/​cm3.
  • Defect concentration, dislocation density, trapping rate, trapping cross-section, aircraft alloy, positron annihilation lifetime technique
  • RePEc:wsi:srlxxx:v:12:y:2005:i:01:p:1-6
Language
  • English
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