Scale analysis of undercut and bulge driven by thermocapillary convection due to surface-active solute on a solidified surface
P. S. Wei,
G. Y. Pan,
C. H. Weng
Abstract:This study scales the shape of the undercut, a depression region near the triple-phase line parallel to the scanning direction, and the bulge in the central region within the fusion zone, considering thermocapillary convection affected by a surface-active solute in the molten pool for the first time. Undercuts, commonly encountered in welding, additive manufacturing, and re-solidification processes, reduce fatigue and fracture strength while enhancing stress concentration. Utilizing the interfacial Young–Lapla… Show more
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