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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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 |
_version_ |
1724731373650968576 |