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Published in: Metallurgical and Materials Transactions A 1/2017

04-11-2016 | Communication

Evolution of Grain Boundary Precipitates in an Al-Cu-Li Alloy During Aging

Authors: Noémie Ott, Shravan K. Kairy, Yuanming Yan, Nick Birbilis

Published in: Metallurgical and Materials Transactions A | Issue 1/2017

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Abstract

The grain boundary microstructure of Al-Cu-Li alloy AA2050 was investigated for different isothermal aging times to rationalize intergranular corrosion (IGC) characteristics. In the underaged condition, the dominant grain boundary precipitates are fine T1 (Al2CuLi). Extended aging revealed that grain boundaries were decorated by large T1 precipitates and S′ phase (Al2CuMg), with S′ growth not dimensionally constrained. Such a transition in the precipitate type at grain boundaries is a unique feature of the Al-Cu-Li system.

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Metadata
Title
Evolution of Grain Boundary Precipitates in an Al-Cu-Li Alloy During Aging
Authors
Noémie Ott
Shravan K. Kairy
Yuanming Yan
Nick Birbilis
Publication date
04-11-2016
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 1/2017
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-016-3848-1

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