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Appl. Sci. 2018, 8(9), 1523; https://doi.org/10.3390/app8091523

Microstructures of Three In-Situ Reinforcements and the Effect on the Tensile Strengths of an Al-Si-Cu-Mg-Ni Alloy

Shaanxi Province Engineering Research Centre for Aluminium/Magnesium Light Alloy and Composites, Materials and Chemical Engineering School, Xi’an Technological University, Xi’an 710021, China
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Received: 19 July 2018 / Revised: 24 August 2018 / Accepted: 27 August 2018 / Published: 1 September 2018
(This article belongs to the Special Issue Metal Matrix Composites)
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Abstract

In the present paper, the microstructures of three kinds of in-situ reinforcements Al-Ti-C, Al-Ti-B, and Al-Ti-B-C-Ce were deeply investigated using a combination of scanning electron microscopy, X-ray diffraction spectroscopy, and transmission electron microscopy. The effect of in-situ reinforcements on the room temperature and elevated temperature (350 °C) tensile strengths of Al-13Si-4Cu-1Mg-2Ni alloy were analyzed. It is found that doping with trace amounts of B and Ce, the size of the Al3Ti phase in the in-situ reinforced alloy changed from 80 µm (un-reinforced) to about 10 µm, with the simultaneous formation of the AlTiCe phase. The Al-Ti-B-C-Ce reinforcement which is rapid solidified, was more effective and superior to enhance the tensile strengths of the Al-13Si-4Cu-1Mg-2Ni alloy, both at room and high temperatures than those of addition other reinforcements. The room temperature (RT) strength increased by 19.0%, and the 350 °C-strength increased by 18.4%. View Full-Text
Keywords: Al-Ti-C; Al-Ti-B; Al-Ti-B-C-Ce; in-situ reinforcement; Al-Si-Cu-Mg-Ni alloy; microstructure; tensile strength Al-Ti-C; Al-Ti-B; Al-Ti-B-C-Ce; in-situ reinforcement; Al-Si-Cu-Mg-Ni alloy; microstructure; tensile strength
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Tian, L.; Guo, Y.; Li, J.; Xia, F.; Liang, M.; Duan, H.; Wang, P.; Wang, J. Microstructures of Three In-Situ Reinforcements and the Effect on the Tensile Strengths of an Al-Si-Cu-Mg-Ni Alloy. Appl. Sci. 2018, 8, 1523.

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