Microstructure and Refinement Performance of Al-Ti-C Master Alloy: Effect of Excess Ti on the Growth and Nucleating Ability of TiC Particles

Kateryna Svynarenko; Yubo Zhang; Jinchuan Jie; Valentyna Kutsova; Tingju Li

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자료유형: 학술저널

저자정보: Kateryna Svynarenko (Dalian University of Technology) Yubo Zhang (Dalian University of Technology) Jinchuan Jie (Dalian University of Technology) Valentyna Kutsova (National Metallurgical Academy of Ukraine) Tingju Li (Dalian University of Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.23 No.5

발행연도: 2017.1

수록면: 994 - 1,001 (8page)

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Al-5Ti-0.2C, Al-0.8Ti-0.2C, Al-8Ti-2C, and Al-10Ti master alloys were prepared and used to investigate theinfluence of excess Ti on the growth of TiC particles and its ability to nucleate Al-grains. The results of a microstructureanalysis of TiC-containing alloys and refined CPAl were interrelated to the results of a refinement test. Itwas found that the presence of excess Ti is essential at the stage of master alloy preparation, as it facilitates thegrowth and uniform distribution of TiC within the structure. In Al-5Ti-0.2C alloy containing excess Ti, carbideparticles grow faster and to a higher extent (from 0.29 μm to 0.44 μm) compared to Al-0.8Ti-0.2C alloy producedwithout excess Ti (from 0.29 μm to 0.32 μm). The results support the “Ti-transition zone theory” as the mechanismof grain refinement by TiC-containing master alloys. The refinement performance of Al-5Ti-0.2C is superiorcompared to the one achieved by adding Al-8Ti-2C and Al-10Ti master alloys in corresponding concentrations. For the TiC particles to become favourable nucleating sites, they must undergo certain interaction with excess Ti atthe stage of master alloy preparation.

참고문헌 (27)

참고문헌 신청

T. Wang / 2013 / Mater. Charact 83:13

A. Cibula / 1949 / J. Inst. Met 76:321

A. Cibula / 1951 / J. Inst. Met 80:126

G. S. V. Kumar / 2005 / J. Alloy. Compd 396:143

A. Banerji / 1986 / Metall. Mater. Trans. A 17:2127

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