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Effects of Alloying Elements on Growth and Morphology of TiC in Arc-Melted TiC/Ti-6Al-4V Composites
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    Abstract:

    10vol%TiC/Ti-6Al-4V composites with various alloying elements were prepared by arc-melting. The effects of different trace alloying elements on the morphology of TiC in the composites were investigated. The results indicate that coarse and developed dendritic is the primary form of TiC in as-cast 10vol%TiC/Ti-6Al-4V composites. However, as 0.3% Sn (mass fraction, similarly hereinafter) is added in the composites, the growth of TiC is restrained and TiC become fine and dispersed particles. The addition of 0.3% Ni element increases the crystallization interval of TiC and promotes the growth of dendritic TiC. In contrast to Ni element, 0.3% Nb addition to the composites decreases the crystallization interval of TiC, so the amount of dendritic TiC is reduced and the formation of eutectic TiC is promoted

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[Cao Lei, Wang Hongwei, Zou Chunming, Wei Zunjie. Effects of Alloying Elements on Growth and Morphology of TiC in Arc-Melted TiC/Ti-6Al-4V Composites[J]. Rare Metal Materials and Engineering,2010,39(10):1773~1776.]
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  • Received:September 13,2009
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