Precipitation in Al‐Cu‐Li Alloys: from the Kinetics of T
            <sub>1</sub>
            Phase Precipitation to Microstructure Development in Friction Stir Welds

Deschamps, A.; Geuser, F. de; Decreus, B.; Malard, B.

doi:10.1002/9781118495292.ch172

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…In Al-Cu-Li alloys, the nanometric phases, such as the δ ′ (Al 3 Li), Θ ′ (Al 2 Cu), S (Al 2 CuMg) and T1 (Al 2 CuLi), contribute to their mechanical resistance [16]. These phases are formed during aging and are significantly affected by thermomechanical treatments (tempers), which influence the mechanical and corrosion resistance of the alloys [17]. For example, the AA2020 alloy shows lower anisotropy degree in the peak aged condition (T8) compared with the underaged (T3) one.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Araujo

Bugarin

Donatus

et al. 2019

Corrosion Engineering, Science and Technology

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The influence of T3, T8 and T851 thermomechanical treatments on the microstructure and corrosion resistance of the AA2198 was investigated. Differential scanning calorimetry and scanning electron microscopy were used for microstructural characterisation, whereas electrochemical methods were employed to analyse the corrosion behaviour of the alloy. The morphology and composition of constituent particles were similar for the T3 and T8 thermomechanical treatments but varied in the T851. There was an inverse relation between T1 phase density and corrosion resistance. The T3 treatment with the highest corrosion resistance was the one with the lowest density of T1 phase. The mechanisms of corrosion varied with the thermomechanical treatments.

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Section: Introductionmentioning

confidence: 99%

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Araujo

Bugarin

Donatus

et al. 2019

Corrosion Engineering, Science and Technology

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Heterogeneity of the Nugget Microstructure in a Thick 2050 Al Friction-Stirred Weld

Avettand-Fènoël

Taillard

2014

Metall Mater Trans A

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Estudo do comportamento eletroquímico de uma liga Al-Cu-Li

Araujo,

Silva,

Viveiros

et al. 2024

Matéria (Rio J.)

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RESUMO Ligas Al-Cu-Li têm apresentado vantagens em relação às ligas Al-Cu-Mg convencionais usadas na indústria aeroespacial devido as suas propriedades, como alta resistência à fadiga e baixa densidade. As propriedades mecânicas destas ligas dependem de sua microestrutura. Neste trabalho, a atividade eletroquímica associada a microestrutura e comportamento à corrosão da liga Al-Cu-Li 2198-T8 foi investigada por testes eletroquímicos e ensaios de imersão em soluções contendo íons cloreto (Cl–). Os resultados obtidos mostraram que o comportamento eletroquímico e a susceptibilidade a corrosão desta liga são fortemente influenciados pela fase T1(Al2CuLi), a qual é a principal responsável pelo endurecimento da mesma. Foi observado ainda que esta fase é eletroquimicamente mais ativa do que a matriz de alumínio e, que quando exposta ao meio corrosivo, resulta em corrosão localizada severa (CLS), devido ao ataque cristalográfico. Nestas regiões foi observada intensa acidificação, principalmente dentro dos pites, resultando na evolução de gás hidrogênio, o que foi confirmado pelos ensaios de visualização em gel. Os resultados obtidos por técnicas eletroquímicas globais e técnica de varredura do eletrodo vibratório (SVET) confirmaram as observações dos ensaios de imersão e de visualização em gel.

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Precipitation in Al‐Cu‐Li Alloys: from the Kinetics of T ₁ Phase Precipitation to Microstructure Development in Friction Stir Welds

Cited by 3 publications

References 31 publications

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Heterogeneity of the Nugget Microstructure in a Thick 2050 Al Friction-Stirred Weld

Estudo do comportamento eletroquímico de uma liga Al-Cu-Li

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Precipitation in Al‐Cu‐Li Alloys: from the Kinetics of T 1 Phase Precipitation to Microstructure Development in Friction Stir Welds

Cited by 3 publications

References 31 publications

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Thermomechanical treatment and corrosion resistance correlation in the AA2198 Al–Cu–Li alloy

Heterogeneity of the Nugget Microstructure in a Thick 2050 Al Friction-Stirred Weld

Estudo do comportamento eletroquímico de uma liga Al-Cu-Li

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Product

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Precipitation in Al‐Cu‐Li Alloys: from the Kinetics of T ₁ Phase Precipitation to Microstructure Development in Friction Stir Welds