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Understanding solute segregation to the dislocation loops in Al-Cu-Mg alloys

Version 2 2024-06-03, 21:04
Version 1 2017-07-07, 12:08
conference contribution
posted on 2024-06-03, 21:04 authored by Ross MarceauRoss Marceau, G Sha, SP Ringer
Dislocation loops are important microstructural features that are present in the quenched microstructure of Al alloys after solution treatment. Like other basic microstructural features such as constituent particles and grain boundaries, dislocation loops can attract a significant amount of solute atoms and as a result, they can affect the overall solute balance in the alloy. Quantitative information about solute segregation levels at the dislocation loops is important for a better estimation of the amount of solute in matrix, which is available for clustering/precipitation during ageing treatment. In this contribution, quenched-in dislocation loops in Al-Cu-Mg alloys have been characterized carefully for their size and number density evolution using transmission electron microscopy. The large-angle convergent beam electron diffraction (LACBED) technique has been employed to characterize their Burger’s vector and habit plane precisely. The loop size evolution during the ageing process has been used to deduce the amount of vacancies migrating to form these dislocation loops. A theoretical calculation has been conducted to assess the level of segregation of solute atoms around the dislocation loops due to vacancy migration and vacancy–solute interactions as dislocation loop size increases by the adsorption of vacancies.

History

Pagination

1-6

Location

Aachen, Germany

Start date

2008-09-22

End date

2008-09-26

ISBN-13

978-3527323678

Language

eng

Publication classification

EN.1 Other conference paper

Copyright notice

2008, Wiley-VCH Verlag GmbH & Co. KGaA

Editor/Contributor(s)

Hirsch J, Strotzki B, Gottstein G

Title of proceedings

ICAA11 : Proceedings of the 11th International Conference on Aluminium Alloys 2008

Event

Aluminium Alloys. Conference (11th : 2008 : Aachen, Germany)

Publisher

Wiley-VCH Verlag GmbH & Co. KGaA

Place of publication

Weinheim, Germany

Series

Aluminium Alloys Conference

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