MAX IV R&D SEMINAR. Metal additive manufacturing research at large scale facilities.

by Tuerdi Maimaitiyili (Swerim)

Wednesday 4 Dec 2019, 13:00 → 14:00 Europe/Stockholm

MAX III meeting room (MAX IV)

Abstract

Additive manufacturing (AM), such as laser powder bed fusion is known to be a potential technology in areas where on-demand manufacturing or customized parts with complicated geometry is a key, such as orthopedics and aerospace. Generally, the melting and solidification processes in AM are complicated and the built material properties strongly depend on the AM process parameters [1,2]. The lack of understanding of such dependency poses a serious problem as it hinders the prediction of the microstructure of the built material, its properties, service life and, for certain applications, it may even completely prohibit the use of AM. The problem lies in the rapid heating and cooling rates (>1000°C/s) used in the AM process, which is difficult to investigate with conventional experimentation techniques, and the material-specific melting and solidification properties of metallic materials [1]. The interaction of high-energy beams (e.g., laser) and materials is not well understood, neither is the correlation between the AM process parameters and the final material properties.  With a high (temporal and special) resolution in-situ setup, which utilizes high energy synchrotron X-rays combined with high-speed camera/detector, it is not only possible to obtain a snapshot of rapid phase transformations and elemental diffusion, but it is also possible to follow the dynamics of beam-material interaction, melting and solidification during AM [1,2]. In addition, with deep penetration capabilities and elemental sensitivity of neutrons in metallic materials, it is also possible to investigate industrially relevant AM build parts non-destructively [2].  Therefore, both synchrotron and neutron sources have an important role in the development of AM, answering many of the questions described above. In this talk, I will present some of our works in AM and metallic materials in general and discuss how metallic materials research benefits from large-scale facilities.

References:

1.      S. Hocine, H. Swygenhoven, S. Petegem, C. Sin TingChang, T. Maimaitiyili, G. Tinti, D. F. Sanchez, D. Grolimund, N. Casati, Operando X-ray diffraction during laser 3D printing, Materials Today, in press, November 2019.

2.      T. Maimaitiyili, R. Woracek, M. Neikter, M. Boin, R.C, Wimpory, R. Pederson, M. Strobl, M. Drakopoulos, N. Schafer, C. Bjerken, Residual Lattice Strain and Phase Distribution in Ti-6Al-4V Produced by Electron Beam Melting. Materials, 12, 2019.