Erratum to: JOM, Vol. 69, No. 3, 2017 DOI: 10.1007/s11837-017-2264-3

In the published version of the paper, Eq. 2 (energy density of a spot melt) lacked the term associated with area of the electron beam necessary for the equation to yield volumetric energy density. The corrected version is shown below and should be used. For reference, the experimental beam radius was assumed to be 80 μm in the published work.

$$ E_v=\frac{i_b t_{on} V}{z \pi r^2} $$
(2)