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

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 ev...

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Main Authors: S. P. O’Brien, J. Christudasjustus, L. Esteves, S. Vijayan, J. R. Jinschek, N. Birbilis, R. K. Gupta
Format: Article
Language:English
Published: Nature Publishing Group 2021-03-01
Series:npj Materials Degradation
Online Access:https://doi.org/10.1038/s41529-021-00158-5
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spelling doaj-9b7e263a24dc4acc8a17c44c4d22b1e42021-03-21T12:25:28ZengNature Publishing Groupnpj Materials Degradation2397-21062021-03-015111010.1038/s41529-021-00158-5A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloyS. P. O’Brien0J. Christudasjustus1L. Esteves2S. Vijayan3J. R. Jinschek4N. Birbilis5R. K. Gupta6Department of Materials Science and Engineering, North Carolina State UniversityDepartment of Materials Science and Engineering, North Carolina State UniversityDepartment of Chemical, Biomolecular and Corrosion Engineering, The University of AkronDepartment of Materials Science and Engineering, The Ohio State UniversityDepartment of Materials Science and Engineering, The Ohio State UniversityCollege of Engineering & Computer Science, Australian National UniversityDepartment of Materials Science and Engineering, North Carolina State UniversityAbstract 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.https://doi.org/10.1038/s41529-021-00158-5
collection DOAJ
language English
format Article
sources DOAJ
author S. P. O’Brien
J. Christudasjustus
L. Esteves
S. Vijayan
J. R. Jinschek
N. Birbilis
R. K. Gupta
spellingShingle S. P. O’Brien
J. Christudasjustus
L. Esteves
S. Vijayan
J. R. Jinschek
N. Birbilis
R. K. Gupta
A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
npj Materials Degradation
author_facet S. P. O’Brien
J. Christudasjustus
L. Esteves
S. Vijayan
J. R. Jinschek
N. Birbilis
R. K. Gupta
author_sort S. P. O’Brien
title A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
title_short A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
title_full A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
title_fullStr A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
title_full_unstemmed A low-cost, low-density, and corrosion resistant AlFeMnSi compositionally complex alloy
title_sort low-cost, low-density, and corrosion resistant alfemnsi compositionally complex alloy
publisher Nature Publishing Group
series npj Materials Degradation
issn 2397-2106
publishDate 2021-03-01
description 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.
url https://doi.org/10.1038/s41529-021-00158-5
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