PSI - Issue 69

C.A. Biffi et al. / Procedia Structural Integrity 69 (2025) 47– 52

50

Fig. 2. Optical micrographs depicting the shapes and microstructures of welded beads obtained at varying scanning speed and beam shaping. Defects are identified in red. Typical regions, like melted zone (MZ), heat affected zone (HAZ) and base material (BM), are also highlighted.

Fig. 3. Magnification of the cross section of the welded bead (BS6 at 50 mm/s), depicting the border between the BM and HAZ. The direction of rapid solification is highlighted by the black arrows.