fig2

Figure 2. HDI strengthening effect in different heterostructured materials. (A) Voxelized structured material^[39] (This figure is quoted with permission from Elsevier); (B) Lamellae structured material^[37] (This figure is quoted with permission from Elsevier); (C) Core-shell material^[41] (This figure is quoted with permission from Elsevier); (D) One example of multi-level HDI strengthening effect.