Paper Title:
Probing the Activation Migration Enthalpies of Dislocations in 2024 Aircraft Material Using Nuclear and Electrical Techniques
  Abstract

Positron annihilation lifetime (PAL) measurement is one of the most important nuclear techniques used in materials science. Electrical measurements are also used in materials science. Both PAL and electrical measurements were used here to determine the activation energy of migration of dislocations in one of the most important engineering aluminum alloys: 2024. Samples of 25% deformed (thickness reduction) material have been used for these studies. The isothermal annealing measurements were performed at 583, 603, 623 and 643K for both techniques. The activation energy of migration of the dislocation was found to be equal to 1.24 ± 0.08eV by using PAL measurements and to 1.35 ± 0.01eV by using the electrical technique.

  Info
Periodical
Defect and Diffusion Forum (Volumes 316-317)
Edited by
D.J. Fisher
Pages
119-126
DOI
10.4028/www.scientific.net/DDF.316-317.119
Citation
M.A. Abdel-Rahman, N.A. Kamel, A. A. Refeay, E. A. Badawi, "Probing the Activation Migration Enthalpies of Dislocations in 2024 Aircraft Material Using Nuclear and Electrical Techniques", Defect and Diffusion Forum, Vols. 316-317, pp. 119-126, 2011
Online since
May 2011
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Price
$32.00
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