A survey of sensitization in 5xxx series aluminum alloys

R. Zhang; S. P. Knight; R. L. Holtz; R. Goswami; C. H.J. Davies; N. Birbilis

doi:10.5006/1787

A survey of sensitization in 5xxx series aluminum alloys

R. Zhang, S. P. Knight, R. L. Holtz, R. Goswami, C. H.J. Davies, N. Birbilis^*

^*Corresponding author for this work

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

124 Citations (Scopus)

Abstract

The 5xxx series (Al-Mg-based) aluminum alloys suffer from intergranular corrosion and intergranular stress corrosion cracking when the alloy has become"sensitized." Sensitization refers to insidious precipitation of β phase (Mg₂Al₃), which is problematic when present at grain boundaries. The β phase is electrochemically active and may preferentially dissolve. This paper reviews the relevant works that have documented the degree of sensitization for various 5xxx series alloys, providing a holistic overview of the issue, along with attention to the bulk composition, heat treatment, and microstructure.

Original language	English
Pages (from-to)	144-159
Number of pages	16
Journal	Corrosion
Volume	72
Issue number	2
DOIs	https://doi.org/10.5006/1787
Publication status	Published - Feb 2016
Externally published	Yes

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title = "A survey of sensitization in 5xxx series aluminum alloys",

abstract = "The 5xxx series (Al-Mg-based) aluminum alloys suffer from intergranular corrosion and intergranular stress corrosion cracking when the alloy has become{"}sensitized.{"} Sensitization refers to insidious precipitation of β phase (Mg2Al3), which is problematic when present at grain boundaries. The β phase is electrochemically active and may preferentially dissolve. This paper reviews the relevant works that have documented the degree of sensitization for various 5xxx series alloys, providing a holistic overview of the issue, along with attention to the bulk composition, heat treatment, and microstructure.",

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author = "R. Zhang and Knight, {S. P.} and Holtz, {R. L.} and R. Goswami and Davies, {C. H.J.} and N. Birbilis",

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AU - Zhang, R.

AU - Knight, S. P.

AU - Holtz, R. L.

AU - Goswami, R.

AU - Davies, C. H.J.

AU - Birbilis, N.

PY - 2016/2

Y1 - 2016/2

N2 - The 5xxx series (Al-Mg-based) aluminum alloys suffer from intergranular corrosion and intergranular stress corrosion cracking when the alloy has become"sensitized." Sensitization refers to insidious precipitation of β phase (Mg2Al3), which is problematic when present at grain boundaries. The β phase is electrochemically active and may preferentially dissolve. This paper reviews the relevant works that have documented the degree of sensitization for various 5xxx series alloys, providing a holistic overview of the issue, along with attention to the bulk composition, heat treatment, and microstructure.

AB - The 5xxx series (Al-Mg-based) aluminum alloys suffer from intergranular corrosion and intergranular stress corrosion cracking when the alloy has become"sensitized." Sensitization refers to insidious precipitation of β phase (Mg2Al3), which is problematic when present at grain boundaries. The β phase is electrochemically active and may preferentially dissolve. This paper reviews the relevant works that have documented the degree of sensitization for various 5xxx series alloys, providing a holistic overview of the issue, along with attention to the bulk composition, heat treatment, and microstructure.

KW - 5xxx series

KW - Aluminum alloys

KW - Intergranular corrosion

KW - Sensitization

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A survey of sensitization in 5xxx series aluminum alloys

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