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基于微观相场模型模拟Ni-Al-V合金沉淀过程,研究合金中有序无序界面和异相间有序畴界的成分及其演化。研究表明,合金元素的偏聚和贫化与界面类型有关。在DO22相与无序相间的有序无序界面处,Ni和Al偏聚,V贫化;在L12相与无序相间的有序无序界面处,Ni和Al贫化,V偏聚;在异相间有序畴界处,V在界面的DO22相一侧贫化,在界面的L12相一侧偏聚;Al则在界面的DO22相一侧偏聚,在界面的L12相一侧贫化。Ni的成分分布与界面的形成方式有关。随着时间的进行,界面处合金元素的成分分布变得更加明锐,但合金元素的偏聚和贫化倾向不变。
Based on the microscopic phase field model, the precipitation process of Ni-Al-V alloy was simulated to study the composition and evolution of orderly boundaries in ordered and interphase alloys. Research shows that the segregation and depletion of alloying elements are related to the type of interface. At the ordered and disordered interfaces between DO22 phase and disordered phase, Ni and Al are segregated and V-depleted. At the ordered disordered interface between L12 and disordered phases, Ni and Al are depleted and V segregates. V is depleted on the DO22 side of the interface and segregated on the L12 phase side of the interface; Al is segregated on the DO22 side of the interface, and on the L12 side of the interface The The composition of Ni is related to the formation of interface. As time goes by, the distribution of alloying elements in the interface becomes more sharp, but the tendency of segregation and depletion of alloying elements does not change.