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Microscopic phase-field simulation for nucleation incubation time of Ni75AlxV25−x alloy

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Abstract

With the microscopic phase-field dynamic model, the effects of temperature and concentration on the nucleation incubation time of Ni75AlxV25−x alloy were studied and the relation between the incubation time and precipitation mechanism was investigated by using the atomic occupation probability picture and average order parameter curve. The simulation results demonstrate that there exists the incubation time for different precipitation mechanisms, such as non-classical nucleation, the mixed style of non-classical nucleation and spinodal decomposition, and spinodal ordering; and the incubation time shortens in turn for the three kinds of mechanisms. With the increase of Al content of Ni75AlxV25−x alloy, the incubation time of L12 phases shortens continuously and that of D022 phases is prolonged. The effects of temperature on the incubation time of L12 and D022 phases are accordant, i.e. the incubation time is greatly prolonged with the temperature rising.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Northwestern Polytechnical University, 710072, Xi’an, China

    Li Yong-sheng PhD, Chen Zheng, Lu Yan-li, Wang Yong-xin & Zhang Jian-jun

  2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi’an, China

    Chen Zheng

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  1. Li Yong-sheng PhD
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  2. Chen Zheng
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  3. Lu Yan-li
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  4. Wang Yong-xin
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  5. Zhang Jian-jun
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Correspondence to Li Yong-sheng PhD.

Additional information

Foundation item: Project(50071046) supported by the National Natural Science Foundation of China; project(2002AA331051) supported by the National High Technology Research and Development Program of China

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Li, Ys., Chen, Z., Lu, Yl. et al. Microscopic phase-field simulation for nucleation incubation time of Ni75AlxV25−x alloy. J Cent. South Univ. Technol. 12, 635–640 (2005). https://doi.org/10.1007/s11771-005-0060-7

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  • DOI: https://doi.org/10.1007/s11771-005-0060-7

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