Title: In situ fabrication of Al₃Ti-Al functionally graded composites by centrifugal casting

Authors: T.J. Chen, J. Li, Y.D. Li, Y. Hao

Addresses: Key Laboratory of Gansu Advanced Nonferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China. ' School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China. ' Key Laboratory of Gansu Advanced Nonferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China. ' Key Laboratory of Gansu Advanced Nonferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China

Abstract: In situ Al₃Ti-Al functionally graded composite rings were fabricated by centrifugal casting. The effects of processing parameters on the microstructures and hardness of the rings were mainly investigated. Simultaneously, the corrosion characteristics of the composites were discussed. The results indicated that not only the Al₃Ti platelet concentration distributed with a gradient along the radial direction of the rings, but also their size appeared in a gradient distribution. The presence of Al₃Ti platelets decreased the corrosion resistance of Al and the corrosion resistance of the rings also appeared in a graded manner.

Keywords: metal-matrix composites; functionally graded composites; aluminium composites; centrifugal casting; microstructure; hardness; corrosion resistance; composite rings; titanium; functionally graded materials; FGM.

DOI: 10.1504/IJMPT.2010.034273

International Journal of Materials and Product Technology, 2010 Vol.39 No.1/2, pp.3 - 19

Published online: 31 Jul 2010 *

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