Study of Structure and Properties of Thin-Walled Elements of Diamond Cellular Structures Made of Aluminum Alloys via Selective Laser Melting

The work is dedicated to the investigation of the possibility of producing and studying the properties of the thin-walled elements of Diamond-type lattice structures, manufactured from the aluminum alloy AlSi10Mg using the selective laser melting method. The accuracy of fabricating the thin-walled elements was assessed depending on the specified model thickness, power, and scanning strategy. It was demonstrated that the minimum wall thickness with minimal porosity was achieved at a laser power of 260 W and a laser scanning speed of 1500 mm/s. Based on the selected SLM parameters, Diamond-type lattice structures with a wall thickness of 200 µm were produced. Tomographic methods confirmed minimal deviation in the thickness and shape of the lattice structure from the model. Mechanical compression tests were conducted to determine the deformation characteristics, as well as the Young’s modulus, yield strength, and ultimate tensile strength. It was shown that the chosen parameters allow for the production of functional lattice structures.