Project description

In the field of additive manufacturing of metals, selective laser melting (SLM) is a widespread process that can be used to process different materials. In the SLM process, a component is built up in layers, whereby a thin layer of powder is applied and locally melted with a laser. The powder is locally melted by the laser and then cools down again in a relatively short time. The temperature profile influences the structure and thus the mechanical properties of the additively manufactured component

There are systems that are equipped with several lasers, so that on one hand a higher construction speed can be achieved when more than one laser is used in parallel, and on the other hand multi-laser scan strategies (exposure strategies) are also possible by overlapping the laser areas, e.g. by using two lasers sequentially expose the same areas.

Multi-laser strategies can be used to influence the temperature profile and thus change the structure. This makes it possible to influence the material properties in a targeted manner, either for the entire component or adapted locally if different properties are desirable, such as surface layers with higher hardness or ductile areas at points of high strain.

The objective of this project is to examine the influence of different multi-laser strategies on the properties of additively manufactured components made of steel