A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy

Ruifeng Zhang; Yao Qiu; Yuanshen Qi; Nick Birbilis

doi:10.1016/j.corsci.2018.01.009

A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy

Ruifeng Zhang^*, Yao Qiu, Yuanshen Qi, Nick Birbilis

^*Corresponding author for this work

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

87 Citations (Scopus)

Abstract

The intergranular corrosion of Al-Mg alloys arises from sensitisation due to thermal exposure. Here, a protected low angle (8.7°) grain boundary which hinders the intergranular corrosion propagation in a sensitised (150°/7 d) Al-Mg alloy was studied in detail. Discrete β-phase was observed on this protected boundary, but with a lower continuity compared to the other fully (or partially) dissolved grain boundaries. The results herein seek to unify the relationship between β-phase continuity and grain boundary misorientation angle as critical for intergranular corrosion propagation in the studied alloy.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Corrosion Science
Volume	133
DOIs	https://doi.org/10.1016/j.corsci.2018.01.009
Publication status	Published - 1 Apr 2018
Externally published	Yes

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10.1016/j.corsci.2018.01.009

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title = "A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy",

abstract = "The intergranular corrosion of Al-Mg alloys arises from sensitisation due to thermal exposure. Here, a protected low angle (8.7°) grain boundary which hinders the intergranular corrosion propagation in a sensitised (150°/7 d) Al-Mg alloy was studied in detail. Discrete β-phase was observed on this protected boundary, but with a lower continuity compared to the other fully (or partially) dissolved grain boundaries. The results herein seek to unify the relationship between β-phase continuity and grain boundary misorientation angle as critical for intergranular corrosion propagation in the studied alloy.",

keywords = "A. Alloy, A. Aluminium, B. SEM, B. TEM, C. Intergranular corrosion",

author = "Ruifeng Zhang and Yao Qiu and Yuanshen Qi and Nick Birbilis",

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T1 - A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy

AU - Zhang, Ruifeng

AU - Qiu, Yao

AU - Qi, Yuanshen

AU - Birbilis, Nick

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The intergranular corrosion of Al-Mg alloys arises from sensitisation due to thermal exposure. Here, a protected low angle (8.7°) grain boundary which hinders the intergranular corrosion propagation in a sensitised (150°/7 d) Al-Mg alloy was studied in detail. Discrete β-phase was observed on this protected boundary, but with a lower continuity compared to the other fully (or partially) dissolved grain boundaries. The results herein seek to unify the relationship between β-phase continuity and grain boundary misorientation angle as critical for intergranular corrosion propagation in the studied alloy.

AB - The intergranular corrosion of Al-Mg alloys arises from sensitisation due to thermal exposure. Here, a protected low angle (8.7°) grain boundary which hinders the intergranular corrosion propagation in a sensitised (150°/7 d) Al-Mg alloy was studied in detail. Discrete β-phase was observed on this protected boundary, but with a lower continuity compared to the other fully (or partially) dissolved grain boundaries. The results herein seek to unify the relationship between β-phase continuity and grain boundary misorientation angle as critical for intergranular corrosion propagation in the studied alloy.

KW - A. Alloy

KW - A. Aluminium

KW - B. SEM

KW - B. TEM

KW - C. Intergranular corrosion

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DO - 10.1016/j.corsci.2018.01.009

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VL - 133

SP - 1

EP - 5

JO - Corrosion Science

JF - Corrosion Science

ER -

A closer inspection of a grain boundary immune to intergranular corrosion in a sensitised Al-Mg alloy

Abstract

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