金属材料晶界结构的拓扑性质与表征

朱思瑛(

), 易敏, 郭万林(

)

Topological Properties and Characteristics of Grain Boundary Structure in Metallic Materials

ZHU Siying(

), YI Min, GUO Wanlin(

)

图8. 3D晶界网络与离散胞复形的映射关系，不同大塑性变形(SPD)工艺处理的演化范围^[1]，3D晶界网络的连续动态再结晶(CDRX)演化过程示意图，及Betti数在有限元(FEM)样品中的分布^[153]

Fig.8. Mapping relationship between 3D grain boundary network and discrete cell complex structure (a)^[1], evolution ranges under different SPDs (SPD—severe plastic deformation, HAGBs—high angle grain boundaries, ARB—accumulative roll bonding, HPT—high-pressure torsion, ECAP—equal-channel angular pressing) (b)^[1], schematics of 3D grain boundary network evolution during CDRX (LAGB—low angle grain boundary) (c)^[153], and Betti number distributions through finite element method (FEM) sample (d)^[153]