*3.3.1.6 Energy density*

This is also known as the powder density and it is the energy responsible for the melting of the powder on the substrate, therefore, the height of a single layer is dependent on the energy density. The energy density is directly proportional to the dilution; therefore, when the energy density is low, the dilution is low and no fusion bond can be formed amongst the high entropy alloy system.

$$E = \frac{P}{vD} \left( I/mm^2\right) \tag{9}$$

where *D* is the laser beam diameter, *P* is the laser power and *v* is the scanning speed, respectively.
