[T6] AM Beam Based Technologies

[14B-T6-07] Innovative Bioinspired Interlocking Mechanism for Enhancing Multimaterial Bonding in Powder Bed Fusion Laser-Based Additive Manufacturing

*J. M. C. Lozares^{1, 2}, A. Molotnikov², K. Asami¹, M. Brandt², C. Emmelmann¹ (1.Hamburg University of Technology, Germany, 2.Royal Melbourne Institute of Technology, Australia)

Keywords:Multimaterial Additive Manufacturing (MMAM) , Interlocking mechanism, Scan parameters , FGM , PBF-LB/M

Recently laser powder bed fusion process was successfully used to produce multi-material components utilising novel powder delivery systems. However, selection of the material combinations suitable for this process is challenging due to inherent chemical and physical properties mismatch that often leads to cracking, dimensional mismatch and poor bond performance at the interface. Furthermore, no strategies for optimisation of laser parameters for the desired arrangement of materials in the 3D-space exist. For this work, a new bioinspired interlocking mechanism is proposed to control the interface bonding between dissimilar materials paired with a new dedicated scanning strategy. The obtained multi-material samples were analysed using scanning electron microscopy to reveal the microstructure, followed by mechanical test to assess the interface strength. The relationship between material selection, microstructure formation and mechanical response will be elaborated.