Microstructure and mechanical properties of a hot-extruded Al-based composite reinforced with core-shell-structured Ti/Al<sub>3</sub>Ti

Li Zhang; Bao-lin Wu; Yu-lin Liu

doi:10.1007/s12613-017-1536-9

Volume 24 Issue 12

Dec. 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(12): 1431-1437

Li Zhang, Bao-lin Wu, and Yu-lin Liu, Microstructure and mechanical properties of a hot-extruded Al-based composite reinforced with core-shell-structured Ti/Al₃Ti, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1431-1437. https://doi.org/10.1007/s12613-017-1536-9

Cite this article as:

Li Zhang, Bao-lin Wu, and Yu-lin Liu, Microstructure and mechanical properties of a hot-extruded Al-based composite reinforced with core-shell-structured Ti/Al3Ti, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1431-1437. https://doi.org/10.1007/s12613-017-1536-9

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Research ArticleOpen Access

Microstructure and mechanical properties of a hot-extruded Al-based composite reinforced with core-shell-structured Ti/Al₃Ti

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Corresponding author:
Li Zhang E-mail: zhangli@sau.edu.cn
Received: 10 April 2017; Revised: 18 May 2017; Accepted: 19 May 2017

Abstract

Abstract

An Al-based composite reinforced with core-shell-structured Ti/Al₃Ti was fabricated through a powder metallurgy route followed by hot extrusion and was found to exhibit promising mechanical properties. The ultimate tensile strength and elongation of the composite sintered at 620℃ for 5h and extruded at a mass ratio of 12.75:1 reached 304 MPa and 14%, respectively, and its compressive deformation reached 60%. The promising mechanical properties are due to the core-shell-structured reinforcement, which is mainly composed of Al₃Ti and Ti and is bonded strongly with the Al matrix, and to the reduced crack sensitivity of Al₃Ti. The refined grains after hot extrusion also contribute to the mechanical properties of this composite. The mechanical properties might be further improved through regulating the relative thickness of Al-Ti intermetallics and Ti metal layers by adjusting the sintering time and the subsequent extrusion process.
- microstructure;
- aluminum-based composites;
- Ti/Al₃Ti;
- reinforcements;
- mechanical properties

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