A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy

S. P. O’Brien; J. Christudasjustus; L. Esteves; S. Vijayan; J. R. Jinschek; N. Birbilis; R. K. Gupta

doi:10.1038/s41529-021-00158-5

A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy

S. P. O’Brien, J. Christudasjustus, L. Esteves, S. Vijayan, J. R. Jinschek, N. Birbilis, R. K. Gupta^*

^*Corresponding author for this work

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

19 Citations (Scopus)

Abstract

A compositionally complex alloy was designed, consisting of equiatomic concentrations of four low-cost commodity elements (Al, Fe, Mn, and Si). The alloy was characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The corrosion of the AlFeMnSi alloy, as evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy in 0.6 M NaCl solution, was comparable with that of stainless steel (SS) 304L. Detailed X-ray photoelectron spectroscopy analysis was carried out, including the determination of high-resolution spectra and surface sputtering. In addition, scanning transmission electron microscopy was also used to study the surface film(s) developed after constant immersion. The AlFeMnSi alloy exhibited a unique form of ‘passivity’ that arises from the development of a silicon-rich surface film from dynamic incongruent dissolution.

Original language	English
Article number	12
Journal	npj Materials Degradation
Volume	5
Issue number	1
DOIs	https://doi.org/10.1038/s41529-021-00158-5
Publication status	Published - Dec 2021

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title = "A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy",

abstract = "A compositionally complex alloy was designed, consisting of equiatomic concentrations of four low-cost commodity elements (Al, Fe, Mn, and Si). The alloy was characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The corrosion of the AlFeMnSi alloy, as evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy in 0.6 M NaCl solution, was comparable with that of stainless steel (SS) 304L. Detailed X-ray photoelectron spectroscopy analysis was carried out, including the determination of high-resolution spectra and surface sputtering. In addition, scanning transmission electron microscopy was also used to study the surface film(s) developed after constant immersion. The AlFeMnSi alloy exhibited a unique form of {\textquoteleft}passivity{\textquoteright} that arises from the development of a silicon-rich surface film from dynamic incongruent dissolution.",

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doi = "10.1038/s41529-021-00158-5",

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T1 - A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy

AU - O’Brien, S. P.

AU - Christudasjustus, J.

AU - Esteves, L.

AU - Vijayan, S.

AU - Jinschek, J. R.

AU - Birbilis, N.

AU - Gupta, R. K.

PY - 2021/12

Y1 - 2021/12

N2 - A compositionally complex alloy was designed, consisting of equiatomic concentrations of four low-cost commodity elements (Al, Fe, Mn, and Si). The alloy was characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The corrosion of the AlFeMnSi alloy, as evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy in 0.6 M NaCl solution, was comparable with that of stainless steel (SS) 304L. Detailed X-ray photoelectron spectroscopy analysis was carried out, including the determination of high-resolution spectra and surface sputtering. In addition, scanning transmission electron microscopy was also used to study the surface film(s) developed after constant immersion. The AlFeMnSi alloy exhibited a unique form of ‘passivity’ that arises from the development of a silicon-rich surface film from dynamic incongruent dissolution.

AB - A compositionally complex alloy was designed, consisting of equiatomic concentrations of four low-cost commodity elements (Al, Fe, Mn, and Si). The alloy was characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The corrosion of the AlFeMnSi alloy, as evaluated using potentiodynamic polarization tests and electrochemical impedance spectroscopy in 0.6 M NaCl solution, was comparable with that of stainless steel (SS) 304L. Detailed X-ray photoelectron spectroscopy analysis was carried out, including the determination of high-resolution spectra and surface sputtering. In addition, scanning transmission electron microscopy was also used to study the surface film(s) developed after constant immersion. The AlFeMnSi alloy exhibited a unique form of ‘passivity’ that arises from the development of a silicon-rich surface film from dynamic incongruent dissolution.

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JO - npj Materials Degradation

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A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy

Abstract

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