Abstract
Selective laser melting (SLM) is an additive manufacturing technique. It allows elements with very complex geometry to be produced using metallic powders. A geometry of manufacturing elements is based only on 3D computer-aided design (CAD) data. The metal powder is melted selectively layer by layer using an ytterbium laser. This paper contains the results of porosity and microhardness analysis made on specimens manufactured during a specially prepared process. Final analysis helped to discover connections between changing hatching distance, exposure speed and porosity. There were no significant differences in microhardness and porosity measurement results in the planes perpendicular and parallel to the machine building platform surface.
Highlights
In recent years an intensive development of additive manufacturing technology (AM) has been observed
4).porosity was determined by images analyzed using a scanning electron microscope (SEM) (Figure 4)
The porosity was determined by images analyzed using a scanning electron microscope (SEM) (Figure 4)
Summary
In recent years an intensive development of additive manufacturing technology (AM) has been observed. This innovative technology is often called “3D printing”. It became one of the leading automated production technologies and it seems to be as important as subtractive manufacturing, plastic forming or casting [1]. Selective laser melting (SLM) is one of the most popular additive manufacturing techniques. It is based on selective fusion of metallic powders using an ytterbium laser, where the manufacturing process is based on a “powder bed”. Regarding other additive manufacturing techniques, selective laser melting is characterized by:
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