金属材料的晶界塑性变形机制

王江伟, 陈映彬, 祝祺, 洪哲, 张泽

Grain Boundary Dominated Plasticity in Metallic Materials

WANG Jiangwei, CHEN Yingbin, ZHU Qi, HONG Zhe, ZHANG Ze

图3 晶界变形与金属材料性能之间的关系[19]

Fig.3 Relationships between grain boundary deformation and properties of metallic materials (a) strengthening of metallic materials due to the impediment of dislocation motion at grain boundaries (d—grain size) (b) grain boundary deformation mediated plastic deformation of metallic materials (G1-G5—different grains in grain boundary networks; dotted lines—sequential grain boundary positions during grain growth) (c) change law of the strength of polycrystalline metal materials with the grain size[19] (dc—critical grain size between Hall-Petch relation and “inverse” Hall-Petch relation)