Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition
Mg-3%Al alloy was refined by carbon inoculation combining with 0.2%Ca addition. High grain refining efficiency was obtained and the synergistic refining mechanism was deeply discussed in the present study. Al–C–O particles, actually Al4C3 particles, were formed in the carbon-inoculated Mg-3%Al alloy...
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KeAi Communications Co., Ltd.
2020-12-01
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doaj-623857c9811d4e0cbe80d8e2aea01efd2021-04-02T19:04:03ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672020-12-018410901101Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca additionChengbo Li0Shuqing Yang1Jun Du2HengBin Liao3Gan Luo4Department of Metallic Materials, School of Materials Science and Engineering, South China University of Technology, Wu Shan Road 381, Tianhe District, Guangzhou 510640, ChinaDepartment of Metallic Materials, School of Materials Science and Engineering, South China University of Technology, Wu Shan Road 381, Tianhe District, Guangzhou 510640, ChinaCorresponding author.; Department of Metallic Materials, School of Materials Science and Engineering, South China University of Technology, Wu Shan Road 381, Tianhe District, Guangzhou 510640, ChinaDepartment of Metallic Materials, School of Materials Science and Engineering, South China University of Technology, Wu Shan Road 381, Tianhe District, Guangzhou 510640, ChinaDepartment of Metallic Materials, School of Materials Science and Engineering, South China University of Technology, Wu Shan Road 381, Tianhe District, Guangzhou 510640, ChinaMg-3%Al alloy was refined by carbon inoculation combining with 0.2%Ca addition. High grain refining efficiency was obtained and the synergistic refining mechanism was deeply discussed in the present study. Al–C–O particles, actually Al4C3 particles, were formed in the carbon-inoculated Mg-3%Al alloy acting as nuclei for α-Mg grains. Ca addition had no obvious effect on size distribution of the nucleating particles. Ca segregation was proved on Al4C3 particles, which should reduce the interfacial energy of nuclei/Mg. The constitutional undercooling in front of nucleus/liquid was increased from 0.12 °C to 0.15 °C induced by 0.2%Ca addition. The synergistic grain refining efficiency can be attributed to the higher constitutional undercooling and lower the interface energy of nucleus/Mg induced by Ca addition. More nucleating particles with small size could be activated acting as potent nuclei of α-Mg grains. Consequently, Mg-3%Al alloy could be effectively refined due to the synergistic effect induced by carbon inoculation combining with Ca.http://www.sciencedirect.com/science/article/pii/S2213956720300803Mg-Al alloysGrain refinementCarbon inoculationSynergistic refinement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chengbo Li Shuqing Yang Jun Du HengBin Liao Gan Luo |
spellingShingle |
Chengbo Li Shuqing Yang Jun Du HengBin Liao Gan Luo Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition Journal of Magnesium and Alloys Mg-Al alloys Grain refinement Carbon inoculation Synergistic refinement |
author_facet |
Chengbo Li Shuqing Yang Jun Du HengBin Liao Gan Luo |
author_sort |
Chengbo Li |
title |
Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition |
title_short |
Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition |
title_full |
Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition |
title_fullStr |
Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition |
title_full_unstemmed |
Synergistic refining mechanism of Mg-3%Al alloy refining by carbon inoculation combining with Ca addition |
title_sort |
synergistic refining mechanism of mg-3%al alloy refining by carbon inoculation combining with ca addition |
publisher |
KeAi Communications Co., Ltd. |
series |
Journal of Magnesium and Alloys |
issn |
2213-9567 |
publishDate |
2020-12-01 |
description |
Mg-3%Al alloy was refined by carbon inoculation combining with 0.2%Ca addition. High grain refining efficiency was obtained and the synergistic refining mechanism was deeply discussed in the present study. Al–C–O particles, actually Al4C3 particles, were formed in the carbon-inoculated Mg-3%Al alloy acting as nuclei for α-Mg grains. Ca addition had no obvious effect on size distribution of the nucleating particles. Ca segregation was proved on Al4C3 particles, which should reduce the interfacial energy of nuclei/Mg. The constitutional undercooling in front of nucleus/liquid was increased from 0.12 °C to 0.15 °C induced by 0.2%Ca addition. The synergistic grain refining efficiency can be attributed to the higher constitutional undercooling and lower the interface energy of nucleus/Mg induced by Ca addition. More nucleating particles with small size could be activated acting as potent nuclei of α-Mg grains. Consequently, Mg-3%Al alloy could be effectively refined due to the synergistic effect induced by carbon inoculation combining with Ca. |
topic |
Mg-Al alloys Grain refinement Carbon inoculation Synergistic refinement |
url |
http://www.sciencedirect.com/science/article/pii/S2213956720300803 |
work_keys_str_mv |
AT chengboli synergisticrefiningmechanismofmg3alalloyrefiningbycarboninoculationcombiningwithcaaddition AT shuqingyang synergisticrefiningmechanismofmg3alalloyrefiningbycarboninoculationcombiningwithcaaddition AT jundu synergisticrefiningmechanismofmg3alalloyrefiningbycarboninoculationcombiningwithcaaddition AT hengbinliao synergisticrefiningmechanismofmg3alalloyrefiningbycarboninoculationcombiningwithcaaddition AT ganluo synergisticrefiningmechanismofmg3alalloyrefiningbycarboninoculationcombiningwithcaaddition |
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1721549735576207360 |