摘要
对多晶金中纳米级晶粒间的小角度晶界应变场进行了实验研究。实验结果显示该晶界由不规律排列的离散位错组成。通过结合高分辨透射电子显微镜和几何相位分析技术计算出了晶界的应变场。应变分布图显示最大的应变值发生在各个位错的位错芯区域。应变由位错芯向外扩散,逐渐变小。对比其中一些位错的应变场发现,当位错间距>1 nm时,位错间的相互影响变小。
We have made a research of nano-grains in polycrystalline gold experiment on strain fields of small-angle grain boundaries. Experimental results show that the grain boundary was formed by irregular arrangement of discrete dislocation. Through a combination of high resolution transmission electron microscopy,we get geometric phase analysis technique to calculate the strain fields of grain boundaries. Strain distribution diagram shows the maximum strain occurred in dislocations of dislocation core area. The strain by the dislocation core outwards is getting smaller. Compared with some of the dislocation strain found,when 1 nm spacing of dislocations,dislocation interactions between will be small.
出处
《中国锰业》
2017年第6期126-128,135,共4页
China Manganese Industry
基金
国家重点攻关项目(2017YFA0204401
2017YFA0204402
2017YFA0204403)
国家自然科学基金NSFC(51520105001)
关键词
晶界
应变
位错
几何相位分析
Grain boundaries
Strain
Dislocation
Geometric phase analysis
