Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing

Abstract An Al-5Mg alloy (AA5083) block, deposited over an AA6061 substrate by wire-arc additive manufacturing, was electrochemically tested along two different cross-sectional planes by cyclic polarization in 3.5 wt.% NaCl. The deposited layers and the interlayer boundaries showed similar polarizat...

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Autores principales:	Amin S. Azar, Angeliki Lekatou, Martin F. Sunding, Joachim S. Graff, Nicky Tzima, Spyros Diplas
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/30bfc374d5d5430ba8bb9ecf18fc9f76
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spelling	oai:doaj.org-article:30bfc374d5d5430ba8bb9ecf18fc9f762021-12-02T15:49:34ZCorrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing10.1038/s41529-021-00175-42397-2106https://doaj.org/article/30bfc374d5d5430ba8bb9ecf18fc9f762021-05-01T00:00:00Zhttps://doi.org/10.1038/s41529-021-00175-4https://doaj.org/toc/2397-2106Abstract An Al-5Mg alloy (AA5083) block, deposited over an AA6061 substrate by wire-arc additive manufacturing, was electrochemically tested along two different cross-sectional planes by cyclic polarization in 3.5 wt.% NaCl. The deposited layers and the interlayer boundaries showed similar polarization behavior regardless of the cross-sectional direction. The corrosion of both the substrate and the deposited layers was mainly attributed to the presence of relatively coarse intermetallic Al(Fe, Mn)Si particles. In the substrate, corrosion was governed by deep crevices along the interfaces of directionally aligned Al(Fe, Mn)Si particles with the Al matrix. The deposited layers and the interlayer boundaries showed pitting around numerous Al(Fe, Mn)Si particles and/or Al(Fe, Mn, Cr, Ti)Si at the interlayer boundaries, which were much finer compared to those of the substrate. The abundance of the fine precipitates and their intergranular location caused surface material removal, which was more extensive along the interlayer boundaries. The perpendicular z-y and z-x planes of the deposited block did not show significant differences in anodic polarization behavior. Differences were more distinct in the case of cathodic polarization. Some anisotropy in polarization behavior was noted through the thickness of the z-y plane that complies with the obtained tensile behavior.Amin S. AzarAngeliki LekatouMartin F. SundingJoachim S. GraffNicky TzimaSpyros DiplasNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ENnpj Materials Degradation, Vol 5, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Amin S. Azar Angeliki Lekatou Martin F. Sunding Joachim S. Graff Nicky Tzima Spyros Diplas Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
description	Abstract An Al-5Mg alloy (AA5083) block, deposited over an AA6061 substrate by wire-arc additive manufacturing, was electrochemically tested along two different cross-sectional planes by cyclic polarization in 3.5 wt.% NaCl. The deposited layers and the interlayer boundaries showed similar polarization behavior regardless of the cross-sectional direction. The corrosion of both the substrate and the deposited layers was mainly attributed to the presence of relatively coarse intermetallic Al(Fe, Mn)Si particles. In the substrate, corrosion was governed by deep crevices along the interfaces of directionally aligned Al(Fe, Mn)Si particles with the Al matrix. The deposited layers and the interlayer boundaries showed pitting around numerous Al(Fe, Mn)Si particles and/or Al(Fe, Mn, Cr, Ti)Si at the interlayer boundaries, which were much finer compared to those of the substrate. The abundance of the fine precipitates and their intergranular location caused surface material removal, which was more extensive along the interlayer boundaries. The perpendicular z-y and z-x planes of the deposited block did not show significant differences in anodic polarization behavior. Differences were more distinct in the case of cathodic polarization. Some anisotropy in polarization behavior was noted through the thickness of the z-y plane that complies with the obtained tensile behavior.
format	article
author	Amin S. Azar Angeliki Lekatou Martin F. Sunding Joachim S. Graff Nicky Tzima Spyros Diplas
author_facet	Amin S. Azar Angeliki Lekatou Martin F. Sunding Joachim S. Graff Nicky Tzima Spyros Diplas
author_sort	Amin S. Azar
title	Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
title_short	Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
title_full	Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
title_fullStr	Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
title_full_unstemmed	Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
title_sort	corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/30bfc374d5d5430ba8bb9ecf18fc9f76
work_keys_str_mv	AT aminsazar corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing AT angelikilekatou corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing AT martinfsunding corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing AT joachimsgraff corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing AT nickytzima corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing AT spyrosdiplas corrosionperformanceanddegradationmechanismofabimetallicaluminumstructureprocessedbywirearcadditivemanufacturing
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Corrosion performance and degradation mechanism of a bi-metallic aluminum structure processed by wire-arc additive manufacturing

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