Localized corrosion at nm-scale hardening precipitates in Al-Cu-Li alloys

Zhu, Yakun; Poplawsky, Jonathan D.; Li, Sirui; Unocic, Raymond R.; Bland, Leslie G.; Taylor, Christopher D.; Locke, Jenifer; Marquis, Emmanuelle A.; Frankel, G. S.

doi:10.1016/j.actamat.2020.03.006

Cited by 49 publications

(23 citation statements)

References 40 publications

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“…The corrosion behaviors of Al-Li alloys are currently being widely investigated. And the results show that the corrosion behaviors of Al-Li alloys are greatly influenced by their heat treatment (Jiang et al, 2020;Chen et al, 2021;Kuang et al, 2021), precipitates (Zhu et al, 2020;Xu et al, 2022), surface abrasion (Liu et al, 2018), and corrosion environment (Qin et al, 2021;Jiang et al, 2022;Guérin et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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The corrosion behavior and tensile strength of the 2060 Al-Li alloy with different heat treatments

Zheng

Yin

et al. 2022

Front. Mater.

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The structural safety and service life of civil aircraft can be decreased by corrosion damage to their aluminum components caused by long-term service in corrosive conditions. In this work, the effect of heat treatment on corrosion behavior and tensile strength was systematically analyzed for 2060 Al-Li alloy immersed in 3.5 wt% NaCl solution for different corrosion times. The results show that the corrosion depths of the 2060-T4 and 2060-T6 Al-Li alloys immersed for 720 h are 85 and 93 μm, respectively. The ultimate tensile strengths of 2060-T4 and 2060-T6 Al-Li alloys immersed for 720 h were reduced by 5.8 and 6.4%, respectively. Linear relationships between tensile strength and the corrosion depths of 2060-T4 and 2060-T6 Al-Li alloys were established as σres=486−0.33h and σres=547−0.35h respectively.

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Section: Introductionmentioning

confidence: 99%

“…The structural components of civil aircraft made of aluminum alloys have a significant impact on their safety (Jiang et al, 2020;Zhu et al, 2020;Kuang et al, 2021;Yin et al, 2022). Corrosion is one of the main damage forms of aircraft aluminum structures and is one of the main causes of aircraft faults and disasters.…”

Section: Introductionmentioning

confidence: 99%

The corrosion behavior and tensile strength of the 2060 Al-Li alloy with different heat treatments

Zheng

Yin

et al. 2022

Front. Mater.

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“…Seawater is roughly equivalent in strength to a 3.5 Wt.% solution of sodium chloride, but the composition is much more complex, containing several major constituents and almost all naturally occurring elements. Localized corrosion usually results from a complex interaction of electrochemical and chemical reactions at the substrate/electrolyte interface, as well as from mass transport processes within the solution (Mohamed et al, 1999;Alamri, 2020;Zhu et al, 2020;Sahu et al, 2020;Frankel and Sridhar, 2008). Direct experimental evidence of the local activation process for cobalt-based alloys is still lacking, and thermodynamics and kinetics cannot provide information on the detailed course of the reaction and the rate.…”

Section: Introductionmentioning

confidence: 99%

Predicting the corrosion properties of cast and hot isostatic pressed CoCrMo/W alloys in seawater by machine learning

Jiang

Yan

2022

ACMM

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Purpose Cobalt-based alloys exhibit a unique combination of wear resistance, strength and corrosion resistance. Localized corrosion of such alloys in seawater system can be several orders of magnitude faster than general corrosion, and direct experimental evidence of the local activation process is still lacking, which makes the accurate prediction for properties difficult, especially for long-term corrosion. The purpose of this study is revealing the relationship between multiple environments and corrosion properties to predict the corrosion of cobalt-based alloys. Design/methodology/approach A data-driven method for the prediction of the corrosion behavior of cast and hot isostatic-pressed CoCrMo/W alloys in seawater is proposed. The gradient boosting regression models calculate mean relative errors (MREs) of 0.160 and 0.435 by evaluating a hold-out set for breakdown potential (Eb) and maximum current density (imax), respectively, considering various compositions, synthesis methods and corrosion environments. Findings The models can be used to estimate the “unseen” cobalt-based alloy after immersion in 3.5 Wt.% NaCl solution for one, two, four and eight months to obtain high precision with MREs of 7.8% and 9.8% for Eb and imax, respectively. Originality/value Machine learning method provides novel and promising insights for the prediction of localized corrosion properties.

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“…Numerous research efforts were made to protect metal surfaces (creating protective passive films) against corrosion with the well-known addition of the alloying elements (traces of chromium, nickel, molybdenum and so on) method [ 16 , 18 , 19 , 20 , 21 ]. In the alloying process, the presence or formation of precipitates might result in localized corrosion, which affects the overall corrosion resistance [ 22 , 23 , 24 ]. In addition, the alloy processing route as the corrosion inhabitant method is not ideally suitable for highly sensitive engineering service environments when there is a lack of high-temperature stability in base or conventional material [ 13 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Zn and Zn–WO3 Composites Nano-Coatings Deposition on Hardness and Corrosion Resistance in Steel Substrate

Kumar

Chandrashekarappa

Kulkarni³

et al. 2021

Materials

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Pure Zn (Zinc) and its Zn–WO3 (Zinc–Tungsten trioxide) composite coatings were deposited on mild steel specimens by applying the electrodeposition technique. Zn–WO3 composites were prepared for the concentration of 0.5 and 1.0 g/L of particles. The influence of WO3 particles on Zn deposition, the surface morphology of composite, and texture co-efficient were analyzed using a variety of techniques, such as X-ray diffraction (XRD) and scanning electron microscopy (SEM) with Energy Dispersive X-ray analysis (EDX). Higher corrosion resistance and microhardness were observed on the Zn–WO3 composite (concentration of 1.0 g/L). The higher corrosion resistance and microhardness of 1.0 g/L Zn–WO3 nanocomposite coatings effectively protect the steel used for the manufacture of products, parts, or systems from chemical or electrochemical deterioration in industrial and marine ambient environments.

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Localized corrosion at nm-scale hardening precipitates in Al-Cu-Li alloys

Cited by 49 publications

References 40 publications

The corrosion behavior and tensile strength of the 2060 Al-Li alloy with different heat treatments

The corrosion behavior and tensile strength of the 2060 Al-Li alloy with different heat treatments

Predicting the corrosion properties of cast and hot isostatic pressed CoCrMo/W alloys in seawater by machine learning

The Effect of Zn and Zn–WO3 Composites Nano-Coatings Deposition on Hardness and Corrosion Resistance in Steel Substrate

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