采用三元微观相场动力学模型,研究了Ni75Al14Mo11合金的沉淀过程及其γ’相的原子占位现象,对合金的微观组织演化图像、序参数及占位几率进行了分析,结果表明,Mo与Al元素的加入使该合金中首先析出L10结构,随后发生L10结构向L12结构的原位结构转变;γ’相沉淀析出方式是等成分有序化兼失稳分解机制;γ’有序相中Al、Mo原子共同占据了面心立方的顶角位,且Al原子在γ’有序相中顶角β2位的占位几率始终稍大于Mo原子。 The precipitation process of Ni75Al14Mo11 alloy and its atomic occupancy of γ ’phase were studied by using the kinetic model of the ternary microscopic phase field. The microstructure evolution images, sequence parameters and occupancy probability of the alloy were analyzed. The results show that Mo With the addition of Al element, the L10 structure is firstly precipitated in the alloy and then the L10 structure is transformed into the in-situ structure of L12 structure. The precipitating method of γ ’phase is the orderly and unstable decomposition mechanism of the isoforms; the γ’ ordered phase The Al and Mo atoms occupy the top corner of face-centered cubic, and the probability of Al atoms occupying β2 of the top corner in the γ’-ordered phase is always slightly larger than that of Mo atom.