Correlation of intergranular corrosion behaviour with microstructure in Al-Cu-Li alloy

Jia lei Huang; Jin feng Li; Dan yang Liu; Rui feng Zhang; Yong lai Chen; Xu hu Zhang; Peng cheng Ma; Rajeev Kumar Gupta; Nick Birbilis

doi:10.1016/j.corsci.2018.05.011

Correlation of intergranular corrosion behaviour with microstructure in Al-Cu-Li alloy

Jia lei Huang, Jin feng Li^*, Dan yang Liu, Rui feng Zhang, Yong lai Chen, Xu hu Zhang, Peng cheng Ma, Rajeev Kumar Gupta, Nick Birbilis

^*Corresponding author for this work

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

74 Citations (Scopus)

Abstract

The IGC behaviour, OCP and microstructure of AA1460 (Al-3.12Cu-2.14Li-0.12Sc-0.12Zr, in wt.%), following HT1 (heat treatment without predeformation) and HT2 (heat treatment with predeformation) tempers were investigated. Both δ′ (Al₃Li) and T₁ (Al₂CuLi) phases were precipitated within grains during heat treatment, while T₁ phase also precipitated in the vicinity of grain boundaries. The evolution of inter- and intra-granular microstructures in AA1460 influenced the local and global electrochemical characteristics, which in turn influenced the temper dependent corrosion morphologies of AA1460. A correlation between OCP and corrosion mode was proposed, which may be used to compare the IGC sensitivity of AA1460 with different tempers.

Original language	English
Pages (from-to)	215-226
Number of pages	12
Journal	Corrosion Science
Volume	139
DOIs	https://doi.org/10.1016/j.corsci.2018.05.011
Publication status	Published - 15 Jul 2018
Externally published	Yes

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10.1016/j.corsci.2018.05.011

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@article{d5473edd90554ddc88a43d44f35a8548,

title = "Correlation of intergranular corrosion behaviour with microstructure in Al-Cu-Li alloy",

abstract = "The IGC behaviour, OCP and microstructure of AA1460 (Al-3.12Cu-2.14Li-0.12Sc-0.12Zr, in wt.%), following HT1 (heat treatment without predeformation) and HT2 (heat treatment with predeformation) tempers were investigated. Both δ′ (Al3Li) and T1 (Al2CuLi) phases were precipitated within grains during heat treatment, while T1 phase also precipitated in the vicinity of grain boundaries. The evolution of inter- and intra-granular microstructures in AA1460 influenced the local and global electrochemical characteristics, which in turn influenced the temper dependent corrosion morphologies of AA1460. A correlation between OCP and corrosion mode was proposed, which may be used to compare the IGC sensitivity of AA1460 with different tempers.",

keywords = "Aluminium, Intergranular corrosion (IGC), Open circuit potential (OCP), TEM",

author = "Huang, {Jia lei} and Li, {Jin feng} and Liu, {Dan yang} and Zhang, {Rui feng} and Chen, {Yong lai} and Zhang, {Xu hu} and Ma, {Peng cheng} and Gupta, {Rajeev Kumar} and Nick Birbilis",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = jul,

day = "15",

doi = "10.1016/j.corsci.2018.05.011",

language = "English",

volume = "139",

pages = "215--226",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Correlation of intergranular corrosion behaviour with microstructure in Al-Cu-Li alloy

AU - Huang, Jia lei

AU - Li, Jin feng

AU - Liu, Dan yang

AU - Zhang, Rui feng

AU - Chen, Yong lai

AU - Zhang, Xu hu

AU - Ma, Peng cheng

AU - Gupta, Rajeev Kumar

AU - Birbilis, Nick

PY - 2018/7/15

Y1 - 2018/7/15

N2 - The IGC behaviour, OCP and microstructure of AA1460 (Al-3.12Cu-2.14Li-0.12Sc-0.12Zr, in wt.%), following HT1 (heat treatment without predeformation) and HT2 (heat treatment with predeformation) tempers were investigated. Both δ′ (Al3Li) and T1 (Al2CuLi) phases were precipitated within grains during heat treatment, while T1 phase also precipitated in the vicinity of grain boundaries. The evolution of inter- and intra-granular microstructures in AA1460 influenced the local and global electrochemical characteristics, which in turn influenced the temper dependent corrosion morphologies of AA1460. A correlation between OCP and corrosion mode was proposed, which may be used to compare the IGC sensitivity of AA1460 with different tempers.

AB - The IGC behaviour, OCP and microstructure of AA1460 (Al-3.12Cu-2.14Li-0.12Sc-0.12Zr, in wt.%), following HT1 (heat treatment without predeformation) and HT2 (heat treatment with predeformation) tempers were investigated. Both δ′ (Al3Li) and T1 (Al2CuLi) phases were precipitated within grains during heat treatment, while T1 phase also precipitated in the vicinity of grain boundaries. The evolution of inter- and intra-granular microstructures in AA1460 influenced the local and global electrochemical characteristics, which in turn influenced the temper dependent corrosion morphologies of AA1460. A correlation between OCP and corrosion mode was proposed, which may be used to compare the IGC sensitivity of AA1460 with different tempers.

KW - Aluminium

KW - Intergranular corrosion (IGC)

KW - Open circuit potential (OCP)

KW - TEM

UR - http://www.scopus.com/inward/record.url?scp=85047075424&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2018.05.011

DO - 10.1016/j.corsci.2018.05.011

M3 - Article

SN - 0010-938X

VL - 139

SP - 215

EP - 226

JO - Corrosion Science

JF - Corrosion Science

ER -

Correlation of intergranular corrosion behaviour with microstructure in Al-Cu-Li alloy

Abstract

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