Hydrodynamic and atomistic studies in support of high power laser experiments for metal ejecta recollection and interactions

Optical Evidence of Compositional Fractioning between Plasma‐Condensed and Melt Pool Matter

“…During analysis, three distinct regions were observed. The first was a region of shock damage (also termed thermal damage, resulting from being proximate to the heated zone, but not directly illuminated), [15,16] followed by two distinct sets of condensate rings. As the particles in the condensate rings were smaller than the resolution of the optical microscope, they were collected for electron imaging and EDS, as shown in Figure 2b.…”

“…[9] While spatter formation during laser welding is well documented in both historical [4,10] and contemporary publications, [11][12][13] particularly regarding the roughness of the resulting welded surface, less research has been published commenting on the chemical composition of the spatter. [14][15][16][17] Mathematical models for predicting the physical attributes and behaviors of these phenomena have been investigated. [18,19] Most contemporary research on melt pools, spatter formation, and plasma plumes have focused on predicting or characterizing the effect of plasma plumes on welds, [20][21][22][23][24][25][26][27] location and size of spatter, and the shape and stability of melt pools.…”