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4 异构背应力的几何必需位错塞积模型[24,53]

Fig.4 Hetero-deformation-induced stress (HDI-stress) in terms of the geometrically necessary dislocation (GND) pile-up (a) back stress (σback) and forward stress (σforward) exerted on CG and NG, respectively, as a function of distance inside the hetero-zone boundary affected region (HBAR). F-R: Frank-Reed source to form the dislocation pile-up on the slip plane. Blue arrow: indefinite scope of σforward to extend into the nano-grains so far due to the lack of the experimental and theoretical evidences (b, c) dislocation pile-up in heterostructures[24,53]