强流脉冲离子束辐照45钢表面热效应的模拟  

THERMAL EFFECT SIMULATION OF STEEL 45 SURFACE IRRADIATED BY HIGH INTENSITY PULSED ION BEAMS

作　　者：莫春立[1] 王琛元[2] 张罡[3] 武小娟[3] 

机构地区：[1]沈阳航空工业学院材料学院,沈阳110034 [2]中国科学院沈阳自动化研究所,沈阳110016 [3]沈阳理工大学材料科学与工程学院,沈阳110168

出　　处：《金属学报》2008年第7期831-836,共6页Acta Metallurgica Sinica

基　　金：沈阳航空工业学院博士启动基金资助项目~~

摘　　要：以Fourier瞬态传热方程为基础,确定了强流脉冲离子束(HIPIB)热效应的基本传热方程,对靶材45钢进行不同能量参数的HIPIB辐照热效应的模拟计算.针对离子注入金属内部的情况,在模拟束流加载方式上分别采用体加载和面加载,比较了两种加载计算结果之间的差距.本算法的另一个改进就是在高能量辐照下,用单元死活法对蚀坑部分材料的消失进行模拟.结果表明,用单元死活法模拟单元的失效,更能符合HIPIB辐照金属表面热效应的蚀坑机制;单元死活法对靶材的升温过程没有明显影响,但对冷却阶段,可以显著提高模拟的精度.Based on Fourier transient state heating conduction equation, a heating conduction equation of HIPIB （high intensity pulsed ion beams） was proposed. The thermal effect of the target surface of steel 45 irradiated by HIPIB with different power densities was simulated. In view of the behavior of ion injection into the metal, thermal loads of ion current density were simulated with body heat flux mode and surface heat flux mode, and the results obtained with two modes were compared. Another improvement in the simulation is the use of element removed reactivated method, which is more preferable to simulate the evaporation of surface metal to form crater under injection by high energy ions, and has little effect on the heating process but improved the simulated precision in cooling precess obviously.

关 键 词：钢 表面处理 离子束辐照 热效应 蚀坑 模拟 

分 类 号：TG156.99[金属学及工艺—热处理] TG142.3[金属学及工艺—金属学]