Microscopic phase-field simulation of L1<sub>2</sub> and D0<sub>22</sub> phases during the early precipitation process of Ni-Cr-Al alloys

Zhong Chu; Zheng Chen; Yongxin Wang; Yanli Lu; Yongsheng Li

doi:10.1016/S1005-8850(06)60087-X

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Zhong Chu, Zheng Chen, Yongxin Wang, Yanli Lu, and Yongsheng Li, Microscopic phase-field simulation of L1₂ and D0₂₂ phases during the early precipitation process of Ni-Cr-Al alloys, J. Univ. Sci. Technol. Beijing , 13(2006), No. 5, pp.429-434. https://dx.doi.org/10.1016/S1005-8850(06)60087-X

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Microscopic phase-field simulation of L1₂ and D0₂₂ phases during the early precipitation process of Ni-Cr-Al alloys

摘要: The influence of temperature on the precipitation mechanism and sequence of L1₂ and D0₂₂ phases during the early pre-cipitation process of a Ni-15.5at%Cr-14at%Al alloy was simulated based on the microscopic phase-field model. In the range from 873 to 1373 K,the precipitation mechanism transformed from spinodal decomposition to non-classic nucleation and growth; the in-cubation period prolonged gradually with increasing temperature. The volume fraction of L1₂ phases increased and that of D0₂₂ phases decreased. D0₂₂ phases disappeared at 1373 K,and finally single-phase L1₂ phases were formed.

Microscopic phase-field simulation of L1₂ and D0₂₂ phases during the early precipitation process of Ni-Cr-Al alloys

Abstract: The influence of temperature on the precipitation mechanism and sequence of L1₂ and D0₂₂ phases during the early pre-cipitation process of a Ni-15.5at%Cr-14at%Al alloy was simulated based on the microscopic phase-field model. In the range from 873 to 1373 K,the precipitation mechanism transformed from spinodal decomposition to non-classic nucleation and growth; the in-cubation period prolonged gradually with increasing temperature. The volume fraction of L1₂ phases increased and that of D0₂₂ phases decreased. D0₂₂ phases disappeared at 1373 K,and finally single-phase L1₂ phases were formed.

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Microscopic phase-field simulation of L12 and D022 phases during the early precipitation process of Ni-Cr-Al alloys

Microscopic phase-field simulation of L12 and D022 phases during the early precipitation process of Ni-Cr-Al alloys

Microscopic phase-field simulation of L1₂ and D0₂₂ phases during the early precipitation process of Ni-Cr-Al alloys

Microscopic phase-field simulation of L1₂ and D0₂₂ phases during the early precipitation process of Ni-Cr-Al alloys