Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys
The modification of eutectic silicon plays a crucial role in enhancing the mechanical properties of hypoeutectic Al–Si alloys. However, there is still limited understanding regarding the factors that affect the modification of eutectic silicon in hypoeutectic Al–Si alloys, particularly in terms of t...
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MDPI AG
2023-12-01
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| Online Access: | https://www.mdpi.com/2075-4701/13/12/1995 |
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| author | Li Huang Xuchu Du Qianyu Zhuang Chunfa Huang Jianguo Li |
| author_facet | Li Huang Xuchu Du Qianyu Zhuang Chunfa Huang Jianguo Li |
| author_sort | Li Huang |
| collection | DOAJ |
| description | The modification of eutectic silicon plays a crucial role in enhancing the mechanical properties of hypoeutectic Al–Si alloys. However, there is still limited understanding regarding the factors that affect the modification of eutectic silicon in hypoeutectic Al–Si alloys, particularly in terms of the role played by alloying elements during the modification process. In order to address this gap, this study aimed to investigate the influence of two key alloying elements, Mg and Cu, on the modification effect of Sr. To achieve this, the morphology of eutectic silicon in the as-cast and heat-treated states of Al–7Si alloy, modified with Sr, was examined using scanning electron microscopy (SEM). Different levels of magnesium and copper content were used to analyze their impact on the modification effect of Sr. The results obtained from the analysis revealed that both Mg and Cu significantly weaken the modification effect of strontium on eutectic silicon. Furthermore, it was observed that the degree of deterioration in the modification effect increases progressively with higher alloying element content. Interestingly, increasing the strontium content and adjusting the cooling rate were found to be ineffective in eliminating this weakening effect caused by Mg and Cu. These findings highlight the complex interplay between alloying elements and the modification process of eutectic silicon in hypoeutectic Al–Si alloys. A deeper understanding of these factors is essential for the development of effective strategies to optimize the mechanical properties of such alloys. |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-08T20:32:08Z |
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| spelling | doaj.art-a4c22cb25da94ae683b23028331f1c782023-12-22T14:24:47ZengMDPI AGMetals2075-47012023-12-011312199510.3390/met13121995Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si AlloysLi Huang0Xuchu Du1Qianyu Zhuang2Chunfa Huang3Jianguo Li4AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaAECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaHangcai Guochuang (Qingdao) High-Speed Railway Material Research Institute Co., Ltd., Qingdao 264111, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaThe modification of eutectic silicon plays a crucial role in enhancing the mechanical properties of hypoeutectic Al–Si alloys. However, there is still limited understanding regarding the factors that affect the modification of eutectic silicon in hypoeutectic Al–Si alloys, particularly in terms of the role played by alloying elements during the modification process. In order to address this gap, this study aimed to investigate the influence of two key alloying elements, Mg and Cu, on the modification effect of Sr. To achieve this, the morphology of eutectic silicon in the as-cast and heat-treated states of Al–7Si alloy, modified with Sr, was examined using scanning electron microscopy (SEM). Different levels of magnesium and copper content were used to analyze their impact on the modification effect of Sr. The results obtained from the analysis revealed that both Mg and Cu significantly weaken the modification effect of strontium on eutectic silicon. Furthermore, it was observed that the degree of deterioration in the modification effect increases progressively with higher alloying element content. Interestingly, increasing the strontium content and adjusting the cooling rate were found to be ineffective in eliminating this weakening effect caused by Mg and Cu. These findings highlight the complex interplay between alloying elements and the modification process of eutectic silicon in hypoeutectic Al–Si alloys. A deeper understanding of these factors is essential for the development of effective strategies to optimize the mechanical properties of such alloys.https://www.mdpi.com/2075-4701/13/12/1995hypoeutectic Al–Si alloysMg contentCu contentSr modificationthe morphology of eutectic silicon |
| spellingShingle | Li Huang Xuchu Du Qianyu Zhuang Chunfa Huang Jianguo Li Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys Metals hypoeutectic Al–Si alloys Mg content Cu content Sr modification the morphology of eutectic silicon |
| title | Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys |
| title_full | Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys |
| title_fullStr | Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys |
| title_full_unstemmed | Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys |
| title_short | Effect of Alloying Elements Mg and Cu on the Modification of Eutectic Silicon in Hypoeutectic Al–Si Alloys |
| title_sort | effect of alloying elements mg and cu on the modification of eutectic silicon in hypoeutectic al si alloys |
| topic | hypoeutectic Al–Si alloys Mg content Cu content Sr modification the morphology of eutectic silicon |
| url | https://www.mdpi.com/2075-4701/13/12/1995 |
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