| 共格沉淀析出过程的模拟Ⅱ--外加应力场的影响 |
| |
| 引用本文： | 陈大钦,李世晨,郑子樵,周明,刘祖耀,李剑,陈志国.共格沉淀析出过程的模拟Ⅱ--外加应力场的影响[J].中国有色金属学报,2006,16(1):116-122. |
| |
| 作者姓名： | 陈大钦 李世晨 郑子樵 周明 刘祖耀 李剑 陈志国 |
| |
| 作者单位： | 中南大学,材料科学与工程学院,长沙,410083 |
| |
| 基金项目： | 中国科学院资助项目;高等学校博士学科点专项科研项目 |
| |
| 摘 要： | 采用相场模型对外加应力场对共格沉淀析出过程的微观结构演化进行模拟研究,在外加应力场作用下,非均匀弹性模量系统沉淀相的析出过程发生重大的变化,粒子沿弹性软方向呈各向异性析出,这种各向异性生长与外加应力、点阵错配度的符号以及非均匀模量差的符号有关。采用双级时效模拟方式时,外加应力场对析出相的成核及生长阶段均有影响,只是影响程度与析出相自身的点阵错配度有关。对适当的体系采用应力时效的方式可能是实现除分子束外延技术之外的一种全新的制备超晶格微结构的方法。
|
| 关 键 词： | 点阵错配度 外加应力 应力时效 计算机模拟 |
| 文章编号： | 1004-0609（2006）01-0116-07 |
| 收稿时间： | 2005-04-26 |
| 修稿时间： | 2005-09-14 |
Simulations of precipitation process of coherent particles Ⅱ-Effect of external stress |
| |
| CHEN Da-qin,LI Shi-chen,ZHENG Zi-qiao,ZHOU Ming,LIU Zu-yao,LI Jian,CHEN Zhi-guo.Simulations of precipitation process of coherent particles Ⅱ-Effect of external stress[J].The Chinese Journal of Nonferrous Metals,2006,16(1):116-122. |
| |
| Authors: | CHEN Da-qin LI Shi-chen ZHENG Zi-qiao ZHOU Ming LIU Zu-yao LI Jian CHEN Zhi-guo |
| |
| Affiliation: | School of Materials Science and Engineering, Central South University, Changsha 410083, China |
| |
| Abstract: | The effect of external stress on the microstructure evolution of alloys containing coherent precipitates was studied by phase field model.In an elastically inhomogeneous system,an applied strain can result in the selective growth of precipitates with homogeneous strain field,which depends on the signs of the applied strain,lattice misfit and the elastic inhomogeneity.Both nucleation and growth are affected by the external stress by two-step aging simulation,but the effect degree depends on lattice misfit.The stress aging technology can be used to obtain superlattice structure for some special systems. |
| |
| Keywords: | lattice misfit external stress stress aging computer simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
