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Ti-45Al-5Nb(-0.3Y)合金的連續(xù)冷卻相變規(guī)律
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國家自然科學(xué)基金 (50673047)資助


Continuous Cooling Phase Transformation of Ti-45Al-5Nb(-0.3Y) Alloys
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    摘要:

    冷卻速度對Ti-45Al-5Nb和Ti-45Al-5Nb-0.3Y合金連續(xù)冷卻相變有較大的影響。爐冷形成全層片組織，空冷下層片形成被α→γm塊狀反應(yīng)抑制，油冷形成了極細(xì)小的層片組織，水冷主要發(fā)生了α→α2有序化轉(zhuǎn)變?？绽鋵?dǎo)致了羽毛狀組織消失和α2相的增加，水冷導(dǎo)致α2晶界的細(xì)小層片晶團(tuán)尺寸較小、數(shù)量較多。Y添加對Ti-45Al-5Nb合金連續(xù)冷卻相變有較小的影響。

    Abstract:

    Cooling rate has drastic effects on the continuous cooling transformation of Ti-45Al-5Nb and Ti-45Al-5Nb-0.3Y alloys. Furnace cooling (FC) leads to the fully lamellar microstructure. Air cooling suppresses the lamellar transformation by the α→γm reaction. Oil cooling leads to the extremely fine lamellar microstructure. At a higher cooling rate (such as water cooling), the α2 phases are predominant. By air cooling a feathery structure disappears and the α2 phase increases. By water cooling, the extremely fine lamellar regions located at initial α2 grain boundaries are smaller and increase for the Ti-45Al-5Nb-0.3Y alloy. Y addition has slight effect on the phase transformation of Ti-45Al-Nb alloy.

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孔凡濤,肖樹龍,陳玉勇,李寶輝. Ti-45Al-5Nb(-0.3Y)合金的連續(xù)冷卻相變規(guī)律[J].稀有金屬材料與工程,2009,38(1):25~28.[Kong Fantao, Xiao Shulong, Chen Yuyong, Li Baohui. Continuous Cooling Phase Transformation of Ti-45Al-5Nb(-0.3Y) Alloys[J]. Rare Metal Materials and Engineering,2009,38(1):25~28.]
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  • 收稿日期:2008-01-10
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