Project C04

Mechanical behavior of hybrid components with gradients of the alloy composition

For the hybrid porous (HyPo) components investigated in the CRC 375, an optimization of the material composition regarding the application is essential. This provides an elementary advance compared with common concepts of topological optimization. Consequently, a sound knowledge of the relation between the material gradient and the mechanical properties is indispensable. Moreover, information about the influence of the material gradation on physical properties (e.g., electrical and magnetic) is needed for the design of multifunctional components. To gain this knowledge, specimens with different gradients between the steels 316L and 17-4 PH are additively manufactured (DED-LB; WAAM). At these specimens, tensile and uniaxial push-pull fatigue test are performed, with a special focus on the impact of the material gradient on the local deformation behavior and global damping properties. In the fatigue tests, the relation between the fatigue properties, the material gradient, the build-up direction in additive manufacturing process and the load level is elaborated. Additionally, the local changes in electrical resistance and magnetic properties are analysed in intermitted fatigue tests.

Project leaders
Prof. Dr.-Ing. Tilmann Beck
Dr.-Ing. Bastian Blinn

Doctoral researcher
Marc Alexander Hoffmann, M.Sc.

Non-research staff
Paul Maximov

Publications