A closer look at the role of Zn in the microstructure and corrosion of an Al-Cu-Li alloy

D. Y. Liu; J. F. Li; Y. L. Ma; R. K. Gupta; N. Birbilis; R. Zhang

doi:10.1016/j.corsci.2018.10.003

A closer look at the role of Zn in the microstructure and corrosion of an Al-Cu-Li alloy

D. Y. Liu, J. F. Li^*, Y. L. Ma, R. K. Gupta, N. Birbilis, R. Zhang

^*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

The influence of various amounts of Zn addition on the microstructure and associated intergranular corrosion of Al-2.8Cu-1.7Li-0.4Mg-0.3Mn-0.12Zr alloys was studied using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy, and corrosion and electrochemical techniques. The added Zn was incorporated into the precipitates at the grain boundaries (GBs). Three types of phases at the GBs were confirmed. The quantity and space of the coarse phases at the GBs were related to Zn addition. The Zn addition decreased the potential difference between the conversed coarse phase (containing Zn) and the adjacent matrix, which improved the intergranular corrosion resistance.

Original language	English
Pages (from-to)	220-231
Number of pages	12
Journal	Corrosion Science
Volume	145
DOIs	https://doi.org/10.1016/j.corsci.2018.10.003
Publication status	Published - Dec 2018
Externally published	Yes

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10.1016/j.corsci.2018.10.003

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title = "A closer look at the role of Zn in the microstructure and corrosion of an Al-Cu-Li alloy",

abstract = "The influence of various amounts of Zn addition on the microstructure and associated intergranular corrosion of Al-2.8Cu-1.7Li-0.4Mg-0.3Mn-0.12Zr alloys was studied using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy, and corrosion and electrochemical techniques. The added Zn was incorporated into the precipitates at the grain boundaries (GBs). Three types of phases at the GBs were confirmed. The quantity and space of the coarse phases at the GBs were related to Zn addition. The Zn addition decreased the potential difference between the conversed coarse phase (containing Zn) and the adjacent matrix, which improved the intergranular corrosion resistance.",

keywords = "A. Al-Cu-Li alloy, A. Zn addition, B. Microstructure",

author = "Liu, {D. Y.} and Li, {J. F.} and Ma, {Y. L.} and Gupta, {R. K.} and N. Birbilis and R. Zhang",

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

year = "2018",

month = dec,

doi = "10.1016/j.corsci.2018.10.003",

language = "English",

volume = "145",

pages = "220--231",

journal = "Corrosion Science",

issn = "0010-938X",

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TY - JOUR

T1 - A closer look at the role of Zn in the microstructure and corrosion of an Al-Cu-Li alloy

AU - Liu, D. Y.

AU - Li, J. F.

AU - Ma, Y. L.

AU - Gupta, R. K.

AU - Birbilis, N.

AU - Zhang, R.

PY - 2018/12

Y1 - 2018/12

N2 - The influence of various amounts of Zn addition on the microstructure and associated intergranular corrosion of Al-2.8Cu-1.7Li-0.4Mg-0.3Mn-0.12Zr alloys was studied using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy, and corrosion and electrochemical techniques. The added Zn was incorporated into the precipitates at the grain boundaries (GBs). Three types of phases at the GBs were confirmed. The quantity and space of the coarse phases at the GBs were related to Zn addition. The Zn addition decreased the potential difference between the conversed coarse phase (containing Zn) and the adjacent matrix, which improved the intergranular corrosion resistance.

AB - The influence of various amounts of Zn addition on the microstructure and associated intergranular corrosion of Al-2.8Cu-1.7Li-0.4Mg-0.3Mn-0.12Zr alloys was studied using transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy, and corrosion and electrochemical techniques. The added Zn was incorporated into the precipitates at the grain boundaries (GBs). Three types of phases at the GBs were confirmed. The quantity and space of the coarse phases at the GBs were related to Zn addition. The Zn addition decreased the potential difference between the conversed coarse phase (containing Zn) and the adjacent matrix, which improved the intergranular corrosion resistance.

KW - A. Al-Cu-Li alloy

KW - A. Zn addition

KW - B. Microstructure

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U2 - 10.1016/j.corsci.2018.10.003

DO - 10.1016/j.corsci.2018.10.003

M3 - Article

SN - 0010-938X

VL - 145

SP - 220

EP - 231

JO - Corrosion Science

JF - Corrosion Science

ER -

A closer look at the role of Zn in the microstructure and corrosion of an Al-Cu-Li alloy

Abstract

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