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3 异构基元的2个特征力学响应：应变梯度和力学迟滞环^[27,52,55]

Fig.3 Two characteristic mechanical responses during tensile deformation in heterostructures
(a) distribution of λ. Upon straining, the initial HB extends to the hetero-zone boundary affected region (HBAR)^[27,52]
(b) mechanical hysteresis loop during unload-reload cycle^[55](

σ_{y}^{u}

and

σ_{y}^{r}

: yield stresses upon unload and reload, respectively; ε_rp (the maximal loop width): residual plastic strain)