PSI - Issue 53

Martin Stepanek et al. / Procedia Structural Integrity 53 (2024) 58–64 Kepka et al./ Structural Integrity Procedia 00 (2023) 000–000

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1. Introduction The main societal goal of the research project was to increase the international competitiveness of the project participants in the field of metal additive technologies, e.g., by joining in the future international R&D projects and participating in the implementation of this modern technology into industrial practice. The professional goal of the project was the development of computational and experimental support for the 3D printing of metal components exposed to multiaxial fatigue loading in operation. Functional samples of multiaxially stressed components were practically designed, dimensioned, and optimized, and their fatigue life was computationally assessed and experimentally verified. All these R&D activities were accompanied by the development of a special software module for multiaxial fatigue life assessment of multiaxially loaded components. 2. Experimental activities 2.1. Materials In the first half of the project solution, test samples were printed from the material EOS Maraging Steel MS1, W Nr. 1.2709 according to European classification, X3NiCoMoTi 18-9-5 according to DIN. In the second half of the project solution, test samples were printed from the material EOS Stainless Steel 316L, W-Nr. 1.4404 according to European classification, X2CrNiMo 17-12-2 according to DIN. 2.2. Test specimens The appropriate shape of the test samples was verified experimentally. Of the three preliminarily tested alternatives, it was finally chosen as the main alternative with the geometry according to Fig. 1a.

Fig. 1. Geometry of test samples.