Volume 33 Issue 08
Aug.  2007
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Zhao Yuhong, Zhang Yue, Chen Zhenget al. Simulation for early precipitation process of Ni75Al4V21 alloy by microscopic phase-field model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(08): 978-981. (in Chinese)
Citation: Zhao Yuhong, Zhang Yue, Chen Zhenget al. Simulation for early precipitation process of Ni75Al4V21 alloy by microscopic phase-field model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2007, 33(08): 978-981. (in Chinese)

Simulation for early precipitation process of Ni75Al4V21 alloy by microscopic phase-field model

  • Received Date: 09 Oct 2006
  • Publish Date: 31 Aug 2007
  • The microscopic phase-field kinetic model for ternary system was applied to investigate the precipitation process of γ′ and θ phase in Ni75Al4V21alloy. The evolution of atomic pictures was simulated, and the composition and long-range order parameters of θ (Ni3V) and γ′ (Ni3Al) were calculated. The results show that θ forms earlier, its precipitation mechanism is congruent ordering followed by spinodal decomposition; By congruent ordering, a nonstoicheometric single θ ordered phase is produced with the order domains being separated by phase boundaries; Spinodal decomposition occurs predominantly at phase boundaries, and then the stoicheometric θ phase is formed; At the same time, γ′ (Ni3Al) appears at phase boundaries of θ phase by nonclassical different phase nucleation mechanism, the nonstoicheometric γ′ phase forms earlier and gradually transforms into the stoicheometric γ′ phase, so two kinds of ordered phases appear simultaneously in the system.

     

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  • [1] 卡恩,哈森,克雷默. 材料的相变[M]. 北京:科学出版社,1998:219 Cahn R W,Haasen P,Kramer E J. Phase transformation in materials[M]. Beijing:Science Press,1998:219(in Chinese) [2] Moelans N, Blanpain B, Wollants P. A phase field model for the simulation of grain growth in materials containing finely dispersed incoherent second-phase particles[J]. Acta Materialia,2005, 53:1771-1781 [3] Yoshihiro S, Yoshiyuki S, Hidehiro O. Phase field simulation of grain growth in three dimensional system containing finely dispersed second-phase particles[J]. Scripta Materialia,2006,55:407-410 [4] Nestler B, Danilov D, Galenko P. Crystal growth of pure substances:phase-field simulatons in comparison with analytical snd experimental results[J]. Journal of Computational Physics,2005,207:221-239 [5] Khachaturyan A G, Lindsey T F, Morris J W. Theoretical investigation of the precipitation of δ′ in Al-Li[J]. Metall Trans,1988,19(A):249 [6] Chen L Q, Khachaturyan A G. Computer simulation of decomposition reactions accompanied by a congruent ordering of the second kind[J]. Scripta Metallurgica et Materialia,1991,25:61-66 [7] 戴吉岩,张静华,金志雄,等. γ/γ′-α定向共晶合金高温时效组织的高分辨电镜研究[J]. 金属学报,1994,30(1):A1-A6 Dai Jiyan, Zhang Jinghua, Jin Zhixiong, et al. HREM study of texture of γ/γ′-α DS eutectic alloy during aging [J]. Acta Metallurgica Sinica,1994,30(1):A1-A6(in Chinese) [8] 卡恩,哈森,克雷默. 材料的塑性变形与断裂[M]. 北京:科学出版社,1998:227 Cahn R W,Haasen P,Kramer E J. Plastic deformation and fracture of materials[M]. Beijing:Science Press,1998:227(in Chinese) [9] Bendersky L A, Biancaniello F S, Williams M E. Solid-solid phase transfomations[M]. Warrendale,PA:TMS,1994:899
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