Ni_(75)Cr_(19)Al_6合金中DO_(22)相标度行为的含应变能微观相场研究  

Microscopic phase-field simulation for scaling behavior of DO_(22) phase in Ni_(75)Cr_(19)Al_6 alloy with strain energy

作　　者：钟汉文[1] 卢艳丽[1] 陈铮[1,2] 徐聪[1] 马锐[1] 孙立岩[1] 

机构地区：[1]西北工业大学材料学院,陕西西安710072 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《材料热处理学报》2009年第4期180-184,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50671084;50875217);中国博士后科学基金(20070420218);陕西省自然科学基金

摘　　要：基于含应变能的微观相场动力学模型,利用结构函数归一化因子和标度函数,对Ni75Cr19Al6合金沉淀后期DO22相的粗化行为进行研究。结果表明:DO22相的结构函数归一化因子和标度函数在沉淀后期阶段均表现出标度行为,加入应变能后,DO22有序畴尺寸在非弹性"软"方向上的长大受到阻碍,DO22有序畴的体积分数也减小,结构函数的归一化结构因子和标度函数曲线峰值均小于未加应变能的值。Based on microscopic phase-field kinetic model and microelasticity theory,the coarsening behavior of DO（22） phase of Ni（75）Cr（19）Al6 alloy in the later precipitation stage was studied using the structure function normalized factor and scaling function.The simulation results show that the structure function normalized factor and scaling function both present scaling behavior,when the elastic strain energy is added,the growth of the ordered domain of DO（22） phase is stunted in the direction of beyond elastic ＂soft＂ direction and its volume fraction is decreased, at the same time, the curve peak value of structure function normalized factor and scaling function are both smaller than that of without strain energy.

关 键 词：应变能 结构函数 标度行为 微观相场 

分 类 号：TG111.5[金属学及工艺—物理冶金]