Abstract
The clustering of vacancies in severely quenched Al-Li solid solution alloys, with Li content between 230 and 2760 ppm, has been studied using Doppler broadening spectroscopy. The alloy samples were initially annealed at 873 K in dry air or dry, pure nitrogen. The onset temperature for vacancy clustering in samples initially annealed in air was found to be 150 ± 10 K, 40 ± 15 K lower than for the nitrogen-annealed samples. This result is consistent with the migration of divacancies, formed as a result of the significant increase in vacancy concentration caused by Li migration to, and oxidation at, the surfaces of samples annealed in air. Li-vacancy binding may also contribute, to a lesser extent, to the ratardation of vacancy migration in the nitrogen-annealed samples. No dependence on Li content was seen in the results for the two sets of samples.
Recommended Citation
H. P. Leighly and P. G. Coleman, "Vacancy Clustering in Quenched Al-Li Solid Solution Alloys Studied by Doppler Broadening Spectroscopy," Journal of Physics Condensed Matter, vol. 10, no. 46, pp. 10423 - 10428, IOP Publishing, Nov 1998.
The definitive version is available at https://doi.org/10.1088/0953-8984/10/46/010
Department(s)
Materials Science and Engineering
International Standard Serial Number (ISSN)
0953-8984
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 IOP Publishing, All rights reserved.
Publication Date
23 Nov 1998
