论文部分内容阅读
一、前言关于细晶超塑性,到目前为止提出过种种变形机理。但是,由于在实际的超塑性变形中观察到显著的晶界滑移,所以把晶界滑移作为主要变形方式来研究变形机理,特别是晶界滑移和扩散流变、以及晶界滑移和晶内滑移的组合这二类被看作是主要的变形机理。在这些变形机理中,扩散流变和晶内滑移在缓和以晶界滑移为基础的晶界交叉点
First, the preamble On the fine-grained superplasticity, so far proposed a variety of deformation mechanism. However, since significant grain boundary slip is observed in the actual superplastic deformation, the grain boundary slip as the main deformation mode is used to study the deformation mechanism, especially grain boundary slip and diffusion rheology, as well as grain boundary slip And the combination of intracrystalline slip these two categories are seen as the main deformation mechanism. In these deformation mechanisms, diffusion rheology and intragranular slip at the mitigation of grain boundary slip based on the junction of grain boundaries