基于有限元模拟的纳米晶Ni的晶间断裂分析  

Intergranular Fracture of Nanocrystalline Ni Based on Finite-element Simulation

作　　者：朱彦生[1] 

机构地区：[1]吉林农业工程职业技术学院,吉林四平136001

出　　处：《铸造技术》2014年第7期1384-1386,共3页Foundry Technology

基　　金：吉林省科技厅"十二五"社会科学规划资助项目(吉教科文合字[2012]第300号)

摘　　要：通过有限元模拟方法研究了纳米晶Ni的晶间断裂。结果表明,在外加载荷作用下,材料宏观力学行为受到变形机制的影响很大。纳米晶Ni的材料特性和晶粒的几何形状分布对晶间微裂纹萌生和扩展影响较大。在纳米晶Ni中,硬化指数和弹性模量较大的晶粒周围会最先萌生微裂纹。The intergranular fracture of nanocrystalline Ni was investigated by the method of finite-element simulation.The results show that the deformation mechanism affects the macroscopic mechanical properties of the material greatly when load is applied. And the material characteristics and geometric shape distribution of the grain affect also the initiation and extension of microcracks. In nanocrystalline Ni, the microcracks will produce first around the grains which have a large hardening exponent and elasticity modulus.

关 键 词：纳米晶Ni 元胞模型 晶间断裂 

分 类 号：TB383.1[一般工业技术—材料科学与工程]