Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation

Yida Xiong; Joseph D. Robson; Zhenjie Cao; Yangchao Deng; Yichao Yao; Xiangli Zhong; Artenis Bendo; Lv Jinlong; Francesco Guarracino; Jack Donoghue; Michele Curioni

doi:10.1016/j.corsci.2023.111570

Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation

Yida Xiong^*, Joseph D. Robson, Zhenjie Cao, Yangchao Deng, Yichao Yao, Xiangli Zhong, Artenis Bendo, Lv Jinlong, Francesco Guarracino, Jack Donoghue, Michele Curioni

^*Corresponding author for this work

Sixth Affiliated Hospital of Sun Yat-Sen University

Research output: Contribution to journal › Article › peer-review

Abstract

The stress corrosion cracking (SCC) behaviors of over-aged and peak-aged AA7075 aluminum alloys in a 5 wt% NaCl solution were compared. Even though the over-aging process induced intergranular corrosion (IGC), it decreased the SCC susceptibility of the material. Grain boundaries (GBs) with misorientation angles less than 30° and the grain matrix were considered factors that reduced the IGC propagation rate, thereby preventing the development of SCC in the over-aged material. η phase grain boundary precipitates (GBPs) underwent de-alloying, forming Cu-enriched particles during the IGC formation. However, the cathodic properties of these particles are not the key factors determining whether the IGC will occur or not.

Original language	English
Article number	111570
Journal	Corrosion Science
Volume	225
Early online date	5 Oct 2023
DOIs	https://doi.org/10.1016/j.corsci.2023.111570
Publication status	Published - 1 Dec 2023

Keywords

Aluminum (A)
De-alloying (C)
Intergranular corrosion (C)
SEM (B)
STEM (B)
Stress corrosion (C)

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Xiong, Y., Robson, J. D., Cao, Z., Deng, Y., Yao, Y., Zhong, X., Bendo, A., Jinlong, L., Guarracino, F., Donoghue, J., & Curioni, M. (2023). Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation. Corrosion Science , 225, Article 111570. https://doi.org/10.1016/j.corsci.2023.111570

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title = "Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation",

abstract = "The stress corrosion cracking (SCC) behaviors of over-aged and peak-aged AA7075 aluminum alloys in a 5 wt% NaCl solution were compared. Even though the over-aging process induced intergranular corrosion (IGC), it decreased the SCC susceptibility of the material. Grain boundaries (GBs) with misorientation angles less than 30° and the grain matrix were considered factors that reduced the IGC propagation rate, thereby preventing the development of SCC in the over-aged material. η phase grain boundary precipitates (GBPs) underwent de-alloying, forming Cu-enriched particles during the IGC formation. However, the cathodic properties of these particles are not the key factors determining whether the IGC will occur or not.",

keywords = "Aluminum (A), De-alloying (C), Intergranular corrosion (C), SEM (B), STEM (B), Stress corrosion (C)",

author = "Yida Xiong and Robson, {Joseph D.} and Zhenjie Cao and Yangchao Deng and Yichao Yao and Xiangli Zhong and Artenis Bendo and Lv Jinlong and Francesco Guarracino and Jack Donoghue and Michele Curioni",

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doi = "10.1016/j.corsci.2023.111570",

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Xiong, Y, Robson, JD, Cao, Z, Deng, Y, Yao, Y, Zhong, X, Bendo, A, Jinlong, L, Guarracino, F, Donoghue, J & Curioni, M 2023, 'Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation', Corrosion Science , vol. 225, 111570. https://doi.org/10.1016/j.corsci.2023.111570

Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation. / Xiong, Yida; Robson, Joseph D.; Cao, Zhenjie et al.
In: Corrosion Science , Vol. 225, 111570, 01.12.2023.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation

AU - Xiong, Yida

AU - Robson, Joseph D.

AU - Cao, Zhenjie

AU - Deng, Yangchao

AU - Yao, Yichao

AU - Zhong, Xiangli

AU - Bendo, Artenis

AU - Jinlong, Lv

AU - Guarracino, Francesco

AU - Donoghue, Jack

AU - Curioni, Michele

PY - 2023/12/1

Y1 - 2023/12/1

N2 - The stress corrosion cracking (SCC) behaviors of over-aged and peak-aged AA7075 aluminum alloys in a 5 wt% NaCl solution were compared. Even though the over-aging process induced intergranular corrosion (IGC), it decreased the SCC susceptibility of the material. Grain boundaries (GBs) with misorientation angles less than 30° and the grain matrix were considered factors that reduced the IGC propagation rate, thereby preventing the development of SCC in the over-aged material. η phase grain boundary precipitates (GBPs) underwent de-alloying, forming Cu-enriched particles during the IGC formation. However, the cathodic properties of these particles are not the key factors determining whether the IGC will occur or not.

AB - The stress corrosion cracking (SCC) behaviors of over-aged and peak-aged AA7075 aluminum alloys in a 5 wt% NaCl solution were compared. Even though the over-aging process induced intergranular corrosion (IGC), it decreased the SCC susceptibility of the material. Grain boundaries (GBs) with misorientation angles less than 30° and the grain matrix were considered factors that reduced the IGC propagation rate, thereby preventing the development of SCC in the over-aged material. η phase grain boundary precipitates (GBPs) underwent de-alloying, forming Cu-enriched particles during the IGC formation. However, the cathodic properties of these particles are not the key factors determining whether the IGC will occur or not.

KW - Aluminum (A)

KW - De-alloying (C)

KW - Intergranular corrosion (C)

KW - SEM (B)

KW - STEM (B)

KW - Stress corrosion (C)

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VL - 225

JO - Corrosion Science

JF - Corrosion Science

M1 - 111570

ER -

Xiong Y, Robson JD, Cao Z, Deng Y, Yao Y, Zhong X et al. Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation. Corrosion Science . 2023 Dec 1;225:111570. Epub 2023 Oct 5. doi: 10.1016/j.corsci.2023.111570

Mitigation effects of over-aging (T73) induced intergranular corrosion on stress corrosion cracking of AA7075 aluminum alloy and behaviors of η phase grain boundary precipitates during the intergranular corrosion formation

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Keywords

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