Microstructure Evolution of Al-Ti-C Alloy Wires during Remelting Process

Abstract:

The regular pattern of evolution of TiC and TiAl₃ during the remelting process of Al-Ti-C alloy wires was analyzed and the impact mechanism was discussed. The results show that: when the temperature of the remelting mass is at 730°C, with the increase of the heat preservation time of remelting, the degree of agglomeration of the original dispersed TiC will increase, and they are pushed toward crystal boundaries by α-Al during the solidification process, while TiAl₃ will dissolve, aggregate, and grow. When the remelting temperature is at 1000°C, as the heat preservation time increases, not only the agglomeration degree of TiC increases significantly compared to that at 730 °C and the sizes and shapes of TiAl₃ change significantly as well. The morphology of TiAl₃ will change from being lump-and-short-rod-like to needle-and-flake-like. Before and after remelting, the Al-Ti-C alloys are both composed of TiAl₃ and TiC, with no other phases formed.

• Periodical: Advanced Materials Research (Volumes 652-654)
• Pages: 1119-1123
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.652-654.1119
• Online since: January 2013
• Authors: Wan Wu Ding, Jiang Tao Zhu, Wen Jun Zhao, Tian Dong Xia
• Keywords: Al-Ti-C Alloy, Microstructure, Remelting, TiAl₃, TiC

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