Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys

The effect of Ca addition on the solidification microstructure of hypoeutectic Al-Si casting alloys was investigated using scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) methods with particular attention focused on the change of morphologies of primary α-Al and eute...

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Main Authors: Xiang-yi Jiao1, Chao-feng Liu1, Jun Wang1
Format: Article
Language:English
Published: Foundry Journal Agency 2019-05-01
Series:China Foundry
Subjects:
Online Access:http://ff.foundryworld.com/uploadfile/2019052848988329.pdf
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spelling doaj-e46ce37940dc4c51a1e90b667b6453442020-11-25T02:52:06ZengFoundry Journal AgencyChina Foundry1672-64211672-64212019-05-0116315316010.1007/s41230-019-9014-9Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloysXiang-yi Jiao10Chao-feng Liu11Jun Wang12School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe effect of Ca addition on the solidification microstructure of hypoeutectic Al-Si casting alloys was investigated using scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) methods with particular attention focused on the change of morphologies of primary α-Al and eutectic silicon. Meanwhile, solute distribution in solid-liquid was simulated according to Scheil-Gulliver law. Results showed that primary α-Al and eutectic silicon were refined as Ca content increased because of the variation of the solute concentration in liquid. The addition of Ca increased the nucleation sites like Al3Ti or Al2Cu to promote the nucleation of primary α-Al. Affected by modification effect of Ca, the shape of eutectic silicon changed from flake to fibrous structure. In addition, coarse plate Ca-rich phases could be found along the grain boundary with high Ca content.http://ff.foundryworld.com/uploadfile/2019052848988329.pdfCa additionprimary α-Aleutectic siliconrefinement
collection DOAJ
language English
format Article
sources DOAJ
author Xiang-yi Jiao1
Chao-feng Liu1
Jun Wang1
spellingShingle Xiang-yi Jiao1
Chao-feng Liu1
Jun Wang1
Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
China Foundry
Ca addition
primary α-Al
eutectic silicon
refinement
author_facet Xiang-yi Jiao1
Chao-feng Liu1
Jun Wang1
author_sort Xiang-yi Jiao1
title Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
title_short Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
title_full Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
title_fullStr Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
title_full_unstemmed Effect of Ca addition on solidification microstructure of hypoeutectic Al-Si casting alloys
title_sort effect of ca addition on solidification microstructure of hypoeutectic al-si casting alloys
publisher Foundry Journal Agency
series China Foundry
issn 1672-6421
1672-6421
publishDate 2019-05-01
description The effect of Ca addition on the solidification microstructure of hypoeutectic Al-Si casting alloys was investigated using scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) methods with particular attention focused on the change of morphologies of primary α-Al and eutectic silicon. Meanwhile, solute distribution in solid-liquid was simulated according to Scheil-Gulliver law. Results showed that primary α-Al and eutectic silicon were refined as Ca content increased because of the variation of the solute concentration in liquid. The addition of Ca increased the nucleation sites like Al3Ti or Al2Cu to promote the nucleation of primary α-Al. Affected by modification effect of Ca, the shape of eutectic silicon changed from flake to fibrous structure. In addition, coarse plate Ca-rich phases could be found along the grain boundary with high Ca content.
topic Ca addition
primary α-Al
eutectic silicon
refinement
url http://ff.foundryworld.com/uploadfile/2019052848988329.pdf
work_keys_str_mv AT xiangyijiao1 effectofcaadditiononsolidificationmicrostructureofhypoeutecticalsicastingalloys
AT chaofengliu1 effectofcaadditiononsolidificationmicrostructureofhypoeutecticalsicastingalloys
AT junwang1 effectofcaadditiononsolidificationmicrostructureofhypoeutecticalsicastingalloys
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