fig5

Figure 5. Cross-sectional IPF images under different laser energy densities of 1,188 J/mm³ (A); 594 J/mm³ (B); 297 J/mm³ (C); 149 J/mm³ (D); 66 J/mm³ (E) of L-PBFed Al6061 MOD alloys^[87]. BF-TEM images obtained from the side view with various laser scan speeds of 0.8 m/s (F); 1.2 m/s (G); 1.6 m/s (H); 2.0 m/s (I) taken from the coarsen area of the Al-Mg-Sc-Zr alloys fabricated by L-PBF; BF-TEM images obtained from the side view with various laser scan speeds of 0.8 m/s (J); 1.2 m/s (K); 1.6 m/s (L); 2.0 m/s (M) taken from the fine area^[45].