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Ni75Cr16.4Al8.6合金粗化過程標(biāo)度行為的微觀相場(chǎng)研究
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國(guó)家自然科學(xué)基金資助(50671084,50875217);中國(guó)博士后科學(xué)基金(2007040218);陜西省自然科學(xué)基金


Microscopic Phase-Field Simulation for Scaling Behavior of Ni75Cr16.4Al8.6 Alloy during Coarsening Process
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    摘要:

    基于微觀相場(chǎng)模型,研究Ni75Cr16.4Al8.6的粗化后期演化過程。結(jié)果表明:L12相和DO22相的標(biāo)度函數(shù)曲線圖表明合金沉淀在粗化階段均表現(xiàn)出標(biāo)度行為,不加應(yīng)變能時(shí)DO22相結(jié)構(gòu)函數(shù)因子和標(biāo)度函數(shù)峰值均大于L12相;加入應(yīng)變能后,兩相的結(jié)構(gòu)函數(shù)因子和標(biāo)度函數(shù)的峰值均變小,反映了應(yīng)變能對(duì)兩相沉淀粗化過程的阻礙影響;相對(duì)于L12相,DO22相減小幅度更大,L12相結(jié)構(gòu)函數(shù)因子和標(biāo)度函數(shù)峰值大于DO22相,應(yīng)變能對(duì)DO22相的阻礙作用更大。

    Abstract:

    Based on the microscopic phase-field kinetic model, the evolution of Ni75Cr16.4Al8.6 alloy in the later stage of coarsening was studied using the structure function normalized factor and scaling function. The simulation results show that both the curves of scaling function of L12 phase and DO22 phase present scaling behavior in the coarsening process. Without elastic strain energy, the peak values of structure function normalized factor and scaling function of DO22 phase are higher than that of L12 phase. When the elastic strain energy is added, the curve peaks of both phases become smaller. It means the growth of both phases are stunted by strain energy; compared with L12 phase, the decrease extent of DO22 phase is larger; peak values of structure function factor and scaling function of L12 phase are higher than that of DO22 phase. The strain energy plays a greater role of restriction on DO22 phase.

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鐘漢文,陳 錚,盧艷麗,徐 聰,馬 瑞,孫立巖. Ni75Cr16.4Al8.6合金粗化過程標(biāo)度行為的微觀相場(chǎng)研究[J].稀有金屬材料與工程,2010,39(7):1185~1188.[Zhong Hanwen, Chen Zheng, Lu Yanli, Xu Cong, Ma Rui, Sun Liyan. Microscopic Phase-Field Simulation for Scaling Behavior of Ni75Cr16.4Al8.6 Alloy during Coarsening Process[J]. Rare Metal Materials and Engineering,2010,39(7):1185~1188.]
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  • 收稿日期:2009-08-09
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