fig4

Figure 4. BSE images showing the cross-section microstructure of Al-Cu-Mg-Mn-Zr alloys with different Zr contents of 0 wt.% (A); 1.00 wt.% (B); 1.98 wt.% (C); 3.72 wt.% (D) processed by L-PBF^[77]. SEM maps of AlFeCr (E) and TiC/AlFeCr (F) alloys; (E1 and E2) Typical SEM images of melt pool interior and melt pool boundary in AlFeCr alloy; (F1 and F2) Typical SEM images of melt pool interior and melt pool boundary in TiC/AlFeCr alloy^[86].