Figure15: Effect of the Laser Parameter on the Melt pool Width
(a) AlCoCrFeNiCu HEA (b) AlTiCrFeCoNi HEA
At an energy density 50 J/mm, the melt pool width using the above
equation gives the value of 4197.83 μm. Consequently, the melt pool
width, melt pool depth and bead height can be estimated at a particular
energy density using the equation above. However, no particular pattern
was observed with the melt pool depth in Figures 16. Some samples had
more contacts than others with the melt pool, which decreases with an
increase in energy density and reduction in scanning speed. Comparing
Figures 17(a) and (b), the bead height decreases with an increase in
energy density attributed to higher intensity of the laser beam causing
a high volume of melting and deeper dilution of the alloys with respect
to a constant powder flow at a higher energy density [12, 101].