The microstructure and property of Al–Si alloy improved by the Sc-microalloying and Y2O3 nano-particles
| Autor: | Jiqiang Chen, Feng Wen, Chao Liu, Weirong Li, Qiongyu Zhou, Wencai Zhu, Yinghui Zhang, Renguo Guan |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 205-217 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1468-6996 1878-5514 14686996 |
| DOI: | 10.1080/14686996.2021.1891841 |
| Popis: | The effect of Sc-microalloying and Y2O3 nano-particles on the microstructure and mechanical properties of as-cast Al-5.5Si alloy is studied by means of optical microscopy, transmission electron microscopy, hardness test and tensile test. The influence of annealing treatment on the microstructure and properties of the Al-Si alloys is also investigated as well. The results show that the addition of Sc and Y2O3 nano-particles could significantly improve the mechanical property of the Al-Si alloy. The ultimate tensile strength and yield strength of Al-Si-Sc/Y2O3 alloy are improved by around 45 and 71%, respectively, when compared to that of the Al-Si alloy. The effect of the nanosized particles (precipitated and added) on strengthening and deformation of Al-Si alloy is analyzed and discussed in detail. The results of annealing treatment indicate that the change in mechanical property of the Al-Si-Sc alloy during annealing treatment is mainly associated with the precipitation of the secondary Si phase. |
| Databáze: | Directory of Open Access Journals |
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