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The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy

This paper studied the relationship between the residual amount of Sr and the morphology of the eutectic Si phase in A356 obtained through different modification treatment processes; additionally, the cooling rates of molds were studied. The eutectic Si phase revealed a satisfactory modification eff...

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Detalles Bibliográficos
Autores principales: Zhang, Wenda, Ma, Shixuan, Wei, Zhenhua, Bai, Peikang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804122/
https://www.ncbi.nlm.nih.gov/pubmed/31581448
http://dx.doi.org/10.3390/ma12193222
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author Zhang, Wenda
Ma, Shixuan
Wei, Zhenhua
Bai, Peikang
author_facet Zhang, Wenda
Ma, Shixuan
Wei, Zhenhua
Bai, Peikang
author_sort Zhang, Wenda
collection PubMed
description This paper studied the relationship between the residual amount of Sr and the morphology of the eutectic Si phase in A356 obtained through different modification treatment processes; additionally, the cooling rates of molds were studied. The eutectic Si phase revealed a satisfactory modification effect at residual Sr amounts above 0.01 wt % in A356 alloys cast using an iron mould. Complete modification of the eutectic Si phase could be achieved at a Sr additive amount 0.03 wt % in an A356 melt. The addition of higher amounts of Sr (~0.04–0.06 wt %) did not improve the modification effect. With the addition of 0.06 wt % Sr into A356 alloy melt and holding at 750 °C, the anti-fading capacity of Sr modification effect could be sustained for 120 minutes. More Sr is needed to obtain a good modification of eutectic Si for an A356 alloy cast using a sand mold.
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spelling pubmed-68041222019-11-18 The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy Zhang, Wenda Ma, Shixuan Wei, Zhenhua Bai, Peikang Materials (Basel) Article This paper studied the relationship between the residual amount of Sr and the morphology of the eutectic Si phase in A356 obtained through different modification treatment processes; additionally, the cooling rates of molds were studied. The eutectic Si phase revealed a satisfactory modification effect at residual Sr amounts above 0.01 wt % in A356 alloys cast using an iron mould. Complete modification of the eutectic Si phase could be achieved at a Sr additive amount 0.03 wt % in an A356 melt. The addition of higher amounts of Sr (~0.04–0.06 wt %) did not improve the modification effect. With the addition of 0.06 wt % Sr into A356 alloy melt and holding at 750 °C, the anti-fading capacity of Sr modification effect could be sustained for 120 minutes. More Sr is needed to obtain a good modification of eutectic Si for an A356 alloy cast using a sand mold. MDPI 2019-10-01 /pmc/articles/PMC6804122/ /pubmed/31581448 http://dx.doi.org/10.3390/ma12193222 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wenda
Ma, Shixuan
Wei, Zhenhua
Bai, Peikang
The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title_full The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title_fullStr The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title_full_unstemmed The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title_short The Relationship between Residual Amount of Sr and Morphology of Eutectic Si Phase in A356 Alloy
title_sort relationship between residual amount of sr and morphology of eutectic si phase in a356 alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6804122/
https://www.ncbi.nlm.nih.gov/pubmed/31581448
http://dx.doi.org/10.3390/ma12193222
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