As Additive Manufacturing technologies are being adopted in more and more industries, the focus of research and development is shifting to the materials in use. On the one hand, limited processability of high-performance materials restrict the robustness of the process in some cases, while in other cases the best materials for a given application cannot be processed at all. There is a strong need to modify or to develop materials specifically for the AM processes that are robustly processable and that at least match conventionally obtained properties. On the other hand, an increasing number of researchers realise the potential of Additive Manufacturing to produce materials that were heretofore inaccessible by conventional manufacturing techniques or not economically feasible. The unique features of AM processes such as strongly non-linear time-temperature profiles, localized metallurgy and rapid alloy development capabilities enable the design of alloys by additive manufacturing. In this talk, examples of alloys for and by AM are given. They include Fe-, Ni- and Al-base alloys.
Short bio: Dr. Eric A. Jägle
Dr. Jägle studied materials science at the University of Stuttgart, receiving a Dipl.-Ing. degree in 2006. In 2006/2007 he spent on year at the University of Cambridge. In the M.Phil. course in Materials Modelling, he worked with H.K.D.H. Bhadeshia on simulating the origin of banding in hot-rolled steel. Afterwards, he returned to Stuttgart for his Ph.D. at the Max-Planck-Institut für Metallforschung (MPI for Metals Research) under the supervision of Prof. E. J. Mittemeijer. His work focused on the mesoscopic simulation of microstructure development during phase transformations, in particular during recrystallization.After receiving his Ph.D. in 2011, he moved to the Max-Planck-Institut für Eisenforschung (MPI for Iron Research) in Düsseldorf. There, he worked as post-doctoral researcher in the department of Prof. D. Raabe on Atom Probe Tomography analysis of electrical steels, precipitation transformations and mechanical alloying. In 2015 he became leader of a newly-formed group in the same department working on alloys for Additive Manufacturing. The group focuses on various aspects of alloys used in AM such as particle reinforcement, in-process strengthening reactions, hot cracking behaviour, residual stress and post-heat treatments. The investigated materials include steels, Ni- and Al- based alloys and composites.