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Ti14合金半固態(tài)等溫熱處理過程中的組織演化規(guī)律
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重大基礎(chǔ)研究前期研究專項項目(2005CCA06400)和國家“973”項目(2007CB613807)


Microstructure Evolution of Ti14 Alloy during Isothermal Process
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    摘要:

    研究了Ti14合金在1000和1050 ℃半固態(tài)下,不同保溫時間微觀組織的演化過程,計算不同半固態(tài)溫度下晶粒的生長指數(shù),并分析半固態(tài)溫度和保溫時間對晶界和晶粒尺寸以及形態(tài)的影響規(guī)律。結(jié)果表明:隨著保溫時間的延長,晶粒明顯長大,晶粒形態(tài)趨于圓整,晶界處液相由不連續(xù)分布轉(zhuǎn)變?yōu)檫B續(xù)分布最終呈網(wǎng)格狀;1000和1050 ℃對應(yīng)的晶粒生長指數(shù)分別為0.88和0.97,表明溫度的升高加速了微觀組織的演化

    Abstract:

    Microstructure evolution of Ti14 (α+Ti2Cu) alloy during isothermal process at different semi-solid temperatures was researched. It is found that both the semi-solid temperature and holding time would affect the morphology of grain boundary and the grain size. The grains grow obviously and the grain’s shape becomes globular with increasing the holding time, the distribution of liquid on grain boundary changes from discontinuous to continuous to form a latticed structure finally. According to the statistic analysis of experimental data, the grain growth index is 0.88 and 0.97 at 1000 ℃ and 1050 ℃, respectively, indicating that the rising of isothermal temperature would accelerated the microstructure evolution

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王 慧,陳永楠,魏建鋒,趙永慶,屈可朋. Ti14合金半固態(tài)等溫熱處理過程中的組織演化規(guī)律[J].稀有金屬材料與工程,2009,38(9):1533~1536.[Wang Hui, Chen Yongnan, Wei Jianfeng, Zhao Yongqing, Qu Kepeng. Microstructure Evolution of Ti14 Alloy during Isothermal Process[J]. Rare Metal Materials and Engineering,2009,38(9):1533~1536.]
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  • 收稿日期:2008-10-11
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