1. The microstructure and property of Al-Si alloy improved by the Sc-microalloying and Y2O3 nano-particles.
- Author
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Jiqiang Chen, Feng Wen, Chao Liu, Weirong Li, Qiongyu Zhou, Wencai Zhu, and Yinghui Zhang
- Subjects
MICROALLOYING ,NANOPARTICLES ,SILICON alloys ,TENSILE strength ,MICROSTRUCTURE ,ALLOYS ,HARDNESS testing - Abstract
The effect of Sc-microalloying and Y
2 O3 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 Y2 O3 nano-particles could significantly improve the mechanical property of the Al-Si alloy. The ultimate tensile strength and yield strength of Al-Si-Sc/Y2 O3 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. [ABSTRACT FROM AUTHOR]- Published
- 2021
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