摘要
采用相场法模型对Cu-Ni-Si合金在时效过程中的单个Ni2Si相和多个Ni2Si相的析出长大行为进行了计算机模拟,并将模拟结果与实验结果进行了对比。结果表明,单个析出相析出长大模型中,随着时效时间的延长,Ni2Si相的当量半径呈现逐渐增加的趋势,Ni2Si相在时效过程中当量半径的长大方程为r=1.336 t^0.318;多个析出相长大模型中,Ni2Si相的析出动力学方程为f=1-exp（-0.142 t^0.529 2）;实验得到的相转变比率和计算机模拟得到的相转变比率都随着时效时间的延长而表现为逐渐增加的趋势,在不同的时效时间下实验结果与计算机模拟结果基本一致。
The phase field method was used to simulate the precipitation behavior of Cu-Ni-Si alloy during aging process of single Ni2Si and multiple Ni2Si phases. The simulation results were compared with the experimental results. The results show that, in the single precipitation growth model, with prolonging of aging time, Ni2Si equivalent radius show a gradually increasing trend, the equivalent radius growth equation of Ni2Si phase in the aging process is r=1.336 t^0.318. In the multiple precipitates grow model, dynamic equation of Ni2Si phase precipitation is f=1-exp（-0.142 t^0.529 2）. The phase transformation ratios obtained by both experiments and computer simulation show gradually increasing trend with prolonging of aging time, experimental results and computer simulation results are basically the same under different aging time.
作者
麻桃花
丰洪微
MA Taohua FENG Hongwei(Inner Mongolia Institute of Mechanical and Electrical Engineering, Hohhot 010070, China School of Materials and Metallurgy, Inner Mongolia Institute of Mechanical and Electrical Engineering, Hohhot 010070, China)
出处
《铸造技术》
CAS
北大核心
2017年第3期648-652,共5页
Foundry Technology
基金
内蒙古自治区高等学校科学研究资助项目(NJSY16423)
