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The microstructure and property of Al–Si alloy improved by the Sc-microalloying and Y(2)O(3) nano-particles

The effect of Sc-microalloying and Y(2)O(3) 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...

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Detalles Bibliográficos
Autores principales: Chen, Jiqiang, Wen, Feng, Liu, Chao, Li, Weirong, Zhou, Qiongyu, Zhu, Wencai, Zhang, Yinghui, Guan, Renguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7952056/
https://www.ncbi.nlm.nih.gov/pubmed/33762892
http://dx.doi.org/10.1080/14686996.2021.1891841
Descripción
Sumario:The effect of Sc-microalloying and Y(2)O(3) 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 Y(2)O(3) nano-particles could significantly improve the mechanical property of the Al-Si alloy. The ultimate tensile strength and yield strength of Al-Si-Sc/Y(2)O(3) 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.