Effects of B addition on the columnar structures of Ti-46Al and Ti-46Al-5Nb alloys

Acta Metall Sin

2008, Vol. 44

Issue (10): 1213-1218 DOI:

Research Articles

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Effects of B addition on the columnar structures of Ti-46Al and Ti-46Al-5Nb alloys

YANG Hui-Min

哈尔滨工业大学

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YANG Hui-Min. Effects of B addition on the columnar structures of Ti-46Al and Ti-46Al-5Nb alloys. Acta Metall Sin, 2008, 44(10): 1213-1218 .

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Abstract The effects of B content on the columnar structures of unidirectionally solidified Ti-46Al and Ti-46Al-5Nb alloys were investigated in the paper. The results show that, with B addition, the columnar structures of Ti-46Al and Ti-46Al-5Nb alloys are refined. The effect of B addition on the columnar structure refinement of Ti-46Al-5Nb alloy is greater than that of Ti-46Al alloy. This is resulted from two reasons. (1) The effects of Nb addition on the columnar structure refinement of Ti-46Al alloy. (2) In Ti-46Al alloy the boride fraction is increased because the solubility of B element was decreased with Nb addition.

Key words: B Ti-46Al Ti-46Al-5Nb columnar structure

Received: 26 February 2008

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2008/V44/I10/1213

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