The influence of the ZhS6K powder Initial characteristics on the alloy microrelief features after selective laser melting

The analysis of the ZhS6K alloy granules appearance, their surface and internal structure, as well as the chemical composition by volume and structural elements is carried out. The formation control possibility is shown for desired state of interfaces (tracks, crystallization cells, hatch block boundaries, grains, phases, discontinuities - pores and cracks) through the fractional composition, packing density during filling, scanning speed that provide a more solid and qualitative material state of the sample. The initial state of the samples structure was studied. A connection between the structure of crystallization cells boundaries, dispersed par- ticles and the fragments structure has been established. It is shown that all investigated samples have a differ- ent structure at the same power and scanning strategy. The analysis was carried out by optical metallography and scanning (raster) electron microscopy (SEM) methods.

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