第二相粒子尺寸对基体晶粒长大影响的仿真研究  

COMPUTER SIMULATION OF THE INFLUENCE OF THE SECOND-PHASE PARTICLE SIZE ON GRAIN GROWTH

作　　者：宋晓艳[1] 刘国权[2] 谷南驹[1] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属学报》1999年第6期565-568,共4页Acta Metallurgica Sinica

摘　　要：根据第二相粒子与基体晶界交互作用的微观物理基础，建立了复相材料晶粒长大的三维图像仿真方法、设计了含有相同体积分数、不同尺寸第二相粒子的复相体系，井全程仿真了三维复相材料的晶粒长大过程．对粒子尺寸影响基体晶粒长大的直接观察和定量分析表明：粒子尺寸越大，晶界的“脱钉”趋势越弱；晶粒长大到达停滞状态所经历的时间越长，停滞态下基体晶粒尺寸越大且尺寸分布的均匀性越低；极限晶粒尺寸与粒子尺寸之间并不存在简单的线性关系，需要考虑粒子弥散程度的影响.A three-dimensional image simulation method for grain growth ill double-phased materials was setup, based on micro physical analysis of interaction between the second-phase particle and thegrain boundary. Double-phased systems containing the second-phase particles of same quantity with various sizes were designed, and the complete process of grain growth was simulated. Direct observation andquantitative analysis of the simulated grain growth in double-phased material showed that, the largerthe particle size is, the weaker is the 'unpinning' tendency of the grain boundary; the longer the timestopping grain growth is the larger is the average grain size and the more inhomogeneous is the grain sizedistribution; there is no simple linear relation between the critical grain size and the particle size, and theinfluences of the perse degree of particles should be taken into consideration.

关 键 词：第二相粒子 晶粒粒大 计算机仿真 

分 类 号：O78[理学—晶体学] TP391.9[自动化与计算机技术—计算机应用技术]