异构金属材料及其塑性变形与应变硬化

武晓雷, 朱运田

Heterostructured Metallic Materials: Plastic Deformation and Strain Hardening

WU Xiaolei, ZHU Yuntian

图1 金属结构材料的异构：基元异构(分别为梯度结构和层状结构)、亚基元异构及复合异构

Fig.1 Heterostructures (HSs) in metallic materials (a, b) zone HSs. Typical examples are gradient structure (a) and lamellar structure (b) (Thick dull-red lines: hetero-zone boundaries; NG: nano-grain; CG: coarse grain) (c) sub-zone HSs of four kinds, respectively, with the low-angle grain boundary (LAGB), nano-twin (NT), nano-precipitate (NP), and chemical short-range order (CSRO) inside the grain interior, all independently as the sub-constituent of HSs (d) composite-like HSs, usually with dual-gradients in both grain size and nano-twin (left)/nano-precipitate (right)