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利用微观相场法模拟了新型Ni3Al(L12)-Ni3V(D022)双级复相金属间化合物合金的时效过程。结果表明:高温(1370 K)时效阶段形成上级结构L12+A1(Ni基固溶体),尺度为微米级;共析温度以下(1200 K)时效阶段形成下级结构L12+D022,尺度为亚微米级,两级时效处理后形成L12+(L12+D022)双级复相微观结构。低温时效阶段,在D022相析出所产生的弹性势作用下,D022/L12相界面由{001}转向{011},{011/2}型界面在时效末期数量占优,最终下级复相组织中的D022相与L12相呈层状相间分布。
The microstructure of the novel Ni3Al (L12) -Ni3V (D022) two-stage composite intermetallic compound was studied by means of microscopic phase field method. The results show that L12 + A1 (Ni-based solid solution) is formed at the aging stage of high temperature (1370 K), and the scale is micrometer at the aging stage (1200 K) Two stages of aging treatment formed L12 + (L12 + D022) two-stage complex phase microstructure. In the low-temperature aging stage, the interface of D022 / L12 phase is turned from {001} to {011} under the elastic potential generated by the precipitation of D022 phase, and the amount of {011/2} interface is dominant at the end of aging, Of D022 phase and L12 phase layered distribution.