“…In contrast, additive manufacturing, e.g., in the form of laser beam sintering of powders, produces complex multiphase ratios at the sintering site where the solid phase, the gas phase, and the molten phase coexist. This condition, together with the high cooling gradients and reflow of the material layers as the beam passes through the new added layer, is not yet clearly described physically [ 9 , 11 , 12 ]. Therefore, the strength of the bonds formed may not automatically be the same when comparing AM production and conventional metallurgy.…”