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Ti14合金半固態(tài)變形的晶界偏析行為
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重大基礎(chǔ)研究前期研究專項項目(2005CCA06400)和國家863項目(2002AA336040)


Grain Boundary Segregation Behavior of Ti14 Alloy after Semi-Solid State Deformation
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    摘要:

    以新型阻燃鈦合金Ti14(α＋Ti2Cu)為對象，研究了合金在半固態(tài)條件下的晶界偏析行為。結(jié)果表明，Ti14半固態(tài)變形使得Cu元素在晶界偏聚，冷卻后以Ti2Cu相偏析于晶界，偏聚和偏析過程與半固態(tài)變形溫度具有較大的相關(guān)性；同時，提出了Ti2Cu相形核和析出長大動力學模式，并用非經(jīng)典形核長大理論進行了解釋。

    Abstract:

    The grain boundary segregation behavior of Ti14, a new typical α+Ti2Cu alloy, was investigated after semi-solid forging at different temperatures. The results reveal that Cu is segregated in grain boundary during semi-solid deformation and precipitated as Ti2Cu phase during the solidification. Temperature has effects on the microstructures of precipitates. A nucleation and precipitation model of Ti2Cu was raised to express the processing of nucleation and precipitation, which can be explained by a nonclassical nucleation and growth theory.

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陳永楠,魏建鋒,趙永慶,屈可朋,王 慧. Ti14合金半固態(tài)變形的晶界偏析行為[J].稀有金屬材料與工程,2009,38(1):42~45.[Chen Yongnan, Wei Jianfeng, Zhao Yongqing, Qu Kepeng, Wang Hui. Grain Boundary Segregation Behavior of Ti14 Alloy after Semi-Solid State Deformation[J]. Rare Metal Materials and Engineering,2009,38(1):42~45.]
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  • 收稿日期:2008-01-10
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