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采用微观相场方法,以Ni75Al15V10合金为例研究了应变能对预析出相的影响。研究发现:合金沉淀早期的应变能影响预析出相L10的析出。无应变能作用时,体系中没有预析出相L10相出现;应变能越大,L10预析出相的孕育期越短,析出量增加,稳定存在时间越长,且体系所析出的L10相的结构特征越明显。应变能较小时,无序基体有些区域先析出L10相,随后所析出的L10相转变为L12相,而在有些区域却直接析出L12相;当应变能较大时,基体大范围先析出L10相,随后部分L10预析出相溶解,只有未溶解部分最终能转变为L12相。
Using the microscopic phase field method, the influence of strain energy on the pre-precipitation phase was studied by taking Ni75Al15V10 alloy as an example. The results show that the early strain of alloy precipitation can affect the precipitation of pre-precipitated phase L10. Without strain energy, no pre-precipitated phase L10 appears in the system. The larger the strain energy is, the shorter the incubation period of L10 pre-precipitated phase is, and the amount of precipitation is increased. The longer the stable existence time, and the structure of L10 phase precipitated by the system The more obvious the features. When the strain energy is small, the L10 phase is first precipitated in some regions of the disordered matrix, and then the L10 phase is transformed into the L12 phase, while the L12 phase is precipitated directly in some regions. When the strain energy is large, the L10 phase , Then part of L10 pre-precipitation dissolved phase, only the undissolved part of the final can be transformed into L12 phase.