Simultaneous improvement in corrosion resistance and hardness of a model 2xxx series Al-Cu alloy with the microstructural variation caused by Sc and Zr additions

S. K. Kairy; B. Rouxel; J. Dumbre; J. Lamb; T. J. Langan; T. Dorin; N. Birbilis

doi:10.1016/j.corsci.2019.108095

Simultaneous improvement in corrosion resistance and hardness of a model 2xxx series Al-Cu alloy with the microstructural variation caused by Sc and Zr additions

S. K. Kairy^*, B. Rouxel, J. Dumbre, J. Lamb, T. J. Langan, T. Dorin, N. Birbilis

^*Corresponding author for this work

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

71 Citations (Scopus)

Abstract

The microstructural variation caused by Sc and Zr additions to a 2xxx series Al-Cu alloy was studied in the context of corrosion and hardness. The addition of Sc and Zr led to microstructural refinement, a decrease in corrosion current density, and a reduction in the extent of pitting and intergranular corrosion; whilst hardness increased. Such an improvement in properties was attributed to the variation of alloy microstructure. It was also noted that an often unreported W-phase (Al_xCu_5-6ScZr_y≈0.3), containing Zr, was ‘cathodic’ relative to the Al-matrix in the Al-Cu-Sc-Zr alloy.

Original language	English
Article number	108095
Journal	Corrosion Science
Volume	158
DOIs	https://doi.org/10.1016/j.corsci.2019.108095
Publication status	Published - Sept 2019

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10.1016/j.corsci.2019.108095

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title = "Simultaneous improvement in corrosion resistance and hardness of a model 2xxx series Al-Cu alloy with the microstructural variation caused by Sc and Zr additions",

abstract = "The microstructural variation caused by Sc and Zr additions to a 2xxx series Al-Cu alloy was studied in the context of corrosion and hardness. The addition of Sc and Zr led to microstructural refinement, a decrease in corrosion current density, and a reduction in the extent of pitting and intergranular corrosion; whilst hardness increased. Such an improvement in properties was attributed to the variation of alloy microstructure. It was also noted that an often unreported W-phase (AlxCu5-6ScZry≈0.3), containing Zr, was {\textquoteleft}cathodic{\textquoteright} relative to the Al-matrix in the Al-Cu-Sc-Zr alloy.",

keywords = "A: Alloy, A: Aluminium, B: Polarisation, B: STEM, C: Intergranular corrosion., C: Pitting corrosion",

author = "Kairy, {S. K.} and B. Rouxel and J. Dumbre and J. Lamb and Langan, {T. J.} and T. Dorin and N. Birbilis",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = sep,

doi = "10.1016/j.corsci.2019.108095",

language = "English",

volume = "158",

journal = "Corrosion Science",

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TY - JOUR

T1 - Simultaneous improvement in corrosion resistance and hardness of a model 2xxx series Al-Cu alloy with the microstructural variation caused by Sc and Zr additions

AU - Kairy, S. K.

AU - Rouxel, B.

AU - Dumbre, J.

AU - Lamb, J.

AU - Langan, T. J.

AU - Dorin, T.

AU - Birbilis, N.

PY - 2019/9

Y1 - 2019/9

N2 - The microstructural variation caused by Sc and Zr additions to a 2xxx series Al-Cu alloy was studied in the context of corrosion and hardness. The addition of Sc and Zr led to microstructural refinement, a decrease in corrosion current density, and a reduction in the extent of pitting and intergranular corrosion; whilst hardness increased. Such an improvement in properties was attributed to the variation of alloy microstructure. It was also noted that an often unreported W-phase (AlxCu5-6ScZry≈0.3), containing Zr, was ‘cathodic’ relative to the Al-matrix in the Al-Cu-Sc-Zr alloy.

AB - The microstructural variation caused by Sc and Zr additions to a 2xxx series Al-Cu alloy was studied in the context of corrosion and hardness. The addition of Sc and Zr led to microstructural refinement, a decrease in corrosion current density, and a reduction in the extent of pitting and intergranular corrosion; whilst hardness increased. Such an improvement in properties was attributed to the variation of alloy microstructure. It was also noted that an often unreported W-phase (AlxCu5-6ScZry≈0.3), containing Zr, was ‘cathodic’ relative to the Al-matrix in the Al-Cu-Sc-Zr alloy.

KW - A: Alloy

KW - A: Aluminium

KW - B: Polarisation

KW - B: STEM

KW - C: Intergranular corrosion.

KW - C: Pitting corrosion

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U2 - 10.1016/j.corsci.2019.108095

DO - 10.1016/j.corsci.2019.108095

M3 - Article

SN - 0010-938X

VL - 158

JO - Corrosion Science

JF - Corrosion Science

M1 - 108095

ER -

Simultaneous improvement in corrosion resistance and hardness of a model 2xxx series Al-Cu alloy with the microstructural variation caused by Sc and Zr additions

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