摘要
利用H-800透射电镜观测表面机械研磨(SMA)1420铝锂合金样品的微观组织结构特征。研究发现,经表面机械研磨处理后1420铝锂合金样品表层发生了严重的塑性变形,从最表层到基体,大致形成四个阶段的变化:纳米层、亚微米层、过渡层、基体组织。其中在过渡层的位错胞结构也很好地映衬出了计算模拟纳米晶体的结构,为进一步研究其纳米化机制奠定了基础。
Microstructure characteristics of surface mechanical attrition（SMA） 1420 A1-Li alloy sample were observed by TEM. The results show that severe plastic deformation is generated in the surface layer of 1420 A1-Li alloy sample by means of SMA. From the surface to the base, four stages of change are approximately formed： nanometer layer, sub-micron layer, transition layer, matrix organization. Among them contrast the dislocation cell structure in the transition layer is also very good out of the computational simulation ofnanocrystal structure, the foundation is important for further study on the mechanism of nano.
出处
《热加工工艺》
CSCD
北大核心
2014年第4期147-149,共3页
Hot Working Technology
关键词
表面机械研磨
1420铝锂合金
纳米层
亚微米层
过渡层
surface mechanical attrition （SMA）
1420 A1-Li alloy
nanometer layer
sub-micron layer
transition layer
