Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys

Abstract The recycled Al alloys have a Fe level above the recommended limits, leading to the precipitation of β-Fe intermetallic particles in their microstructure. The brittle β-Fe particles show a rough morphology in the form of highly-faceted platelets, which is detrimental to the alloy's mec...

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Autores principales:	Carlos Jr. Narducci, Gabriela Lujan Brollo, Rafael Humberto Mota de Siqueira, André Silva Antunes, Antonio Jorge Abdalla
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/38d78634b0a249e5a8fd9326d43bf1db
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spelling	oai:doaj.org-article:38d78634b0a249e5a8fd9326d43bf1db2021-12-02T15:38:10ZEffect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys10.1038/s41598-021-89050-52045-2322https://doaj.org/article/38d78634b0a249e5a8fd9326d43bf1db2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89050-5https://doaj.org/toc/2045-2322Abstract The recycled Al alloys have a Fe level above the recommended limits, leading to the precipitation of β-Fe intermetallic particles in their microstructure. The brittle β-Fe particles show a rough morphology in the form of highly-faceted platelets, which is detrimental to the alloy's mechanical performance containing these precipitates. This work analyses the possible interactions of the addition of 0–1 wt% of the grain refiner Nb + B to the morphology and size of β-Fe precipitates in alloys melted with Al-(7, 9, 12) wt% Si and 1 wt% Fe. The results indicate that the addition of the Nb + B inoculant revealed a significant change in the precipitates' size and morphology, which have become remarkably refined and spheroidized. Moreover, deepening the study through qualitative and quantitative analyses, it was found that the behaviour of the β-Fe precipitates follows an exponential decay with the increasing addition of Nb + B, a curve analogous to the primary α-Al grain refinement one, revealing a direct correlation between the events. Finally, it was possible to suggest a mechanism that shows how the phenomenon of morphological transformation of the β-Fe precipitates occurs in the material with the addition of the Nb + B inoculant.Carlos Jr. NarducciGabriela Lujan BrolloRafael Humberto Mota de SiqueiraAndré Silva AntunesAntonio Jorge AbdallaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Carlos Jr. Narducci Gabriela Lujan Brollo Rafael Humberto Mota de Siqueira André Silva Antunes Antonio Jorge Abdalla Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
description	Abstract The recycled Al alloys have a Fe level above the recommended limits, leading to the precipitation of β-Fe intermetallic particles in their microstructure. The brittle β-Fe particles show a rough morphology in the form of highly-faceted platelets, which is detrimental to the alloy's mechanical performance containing these precipitates. This work analyses the possible interactions of the addition of 0–1 wt% of the grain refiner Nb + B to the morphology and size of β-Fe precipitates in alloys melted with Al-(7, 9, 12) wt% Si and 1 wt% Fe. The results indicate that the addition of the Nb + B inoculant revealed a significant change in the precipitates' size and morphology, which have become remarkably refined and spheroidized. Moreover, deepening the study through qualitative and quantitative analyses, it was found that the behaviour of the β-Fe precipitates follows an exponential decay with the increasing addition of Nb + B, a curve analogous to the primary α-Al grain refinement one, revealing a direct correlation between the events. Finally, it was possible to suggest a mechanism that shows how the phenomenon of morphological transformation of the β-Fe precipitates occurs in the material with the addition of the Nb + B inoculant.
format	article
author	Carlos Jr. Narducci Gabriela Lujan Brollo Rafael Humberto Mota de Siqueira André Silva Antunes Antonio Jorge Abdalla
author_facet	Carlos Jr. Narducci Gabriela Lujan Brollo Rafael Humberto Mota de Siqueira André Silva Antunes Antonio Jorge Abdalla
author_sort	Carlos Jr. Narducci
title	Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
title_short	Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
title_full	Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
title_fullStr	Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
title_full_unstemmed	Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys
title_sort	effect of nb addition on the size and morphology of the β-fe precipitates in recycled al-si alloys
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/38d78634b0a249e5a8fd9326d43bf1db
work_keys_str_mv	AT carlosjrnarducci effectofnbadditiononthesizeandmorphologyofthebfeprecipitatesinrecycledalsialloys AT gabrielalujanbrollo effectofnbadditiononthesizeandmorphologyofthebfeprecipitatesinrecycledalsialloys AT rafaelhumbertomotadesiqueira effectofnbadditiononthesizeandmorphologyofthebfeprecipitatesinrecycledalsialloys AT andresilvaantunes effectofnbadditiononthesizeandmorphologyofthebfeprecipitatesinrecycledalsialloys AT antoniojorgeabdalla effectofnbadditiononthesizeandmorphologyofthebfeprecipitatesinrecycledalsialloys
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Effect of Nb addition on the size and morphology of the β-Fe precipitates in recycled Al-Si alloys

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