Knowing the Material Structure and Behavior of Today to create the Materials of Tomorrow

by Liehr Alexander (University of Kassel)

Tuesday 22 Mar 2022, 13:15 → 14:00 Europe/Berlin

Online

Liehr, A.1, Degener, S.1, Bolender, A.1, Faria, G.A.2, Dovzhenko, G.2, Staron, P.2, Müller, M.2, Niendorf, T.1

1Institute of Materials Engineering (University of Kassel), Mönchebergstr. 3, 34125 Kassel, Germany

2Materials Physics, X-Ray Diffraction with Synchrotron Radiation, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Str. 1, 21502 Geesthacht, Germany

 

X-ray diffraction techniques allow for non-destructive analysis in materials science, e.g., phase analysis, preferred orientation analysis and residual stress analysis in the near-surface region. In this regard, energy-dispersive X-ray diffraction enables the combined analysis of these characteristics [1]. Furthermore, various penetration depths as a direct consequence of the different beam energies allow for depth-resolved analysis of residual stresses [2].

On one of two selected examples for this lecture is the study of the stability of the retained austenite phase in a high-strength, multi-phase Steel by in situ measurements, at the P02.1 beamline. The crucial role of texture on stress measurements and deformation behavior at an additive manufactured (AM) IN718 alloy should be the second example [3,4]. To analyze a stress gradient in a typical AM sample nondestructively transmission measurements and reflection measurements is needed at the same setup. This can be realized at the new white beam station P61A of Helmholtz-Zentrum Hereon at PETRA III, DESY using high intensities at a wide range of energies up to 200 keV.

As future aspects the possibility of intelligent active experiments will be studied under lab condition as a potential chance for enhanced beam times [5].

 

[1] C. Genzel, I.A. Denks, J. Gibmeier, M. Klaus, G. Wagener, The materials science synchrotron beamline EDDI for energy-dispersive diffraction analysis, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 578 (2007) 23–33.

[2] A. Liehr, W. Zinn, S. Degener, B. Scholtes, T. Niendorf, C. Genzel, Energy Resolved Residual Stress Analysis with Laboratory X-Ray Sources, HTM 72 (2017) 115–121.

[3] B. Aminforoughi, S. Degener, J. Richter, A. Liehr, T. Niendorf, A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation, Advanced Engineering Materials published by Wiley-VCH GmbH (2021)

[4] F. Brenne, S. Leuders, T. Niendorf, On the Impact of Additive Manufacturing on Microstructural and Mechanical Properties of Stainless Steel and Ni-base Alloys, Berg Huettenmaenn Monatsh 162 (2017) 199–202.

[5] K. Dingel, A. Liehr, M. Vogel, S. Degener, D. Meier, T. Niendorf, A. Ehresmann and B. Sick, AI-Based On The Fly Design of Experiments in Physics and Engineering, 2021 IEEE International Conference on Autonomic Computing and Self-Organizing Systems Companion (ACSOS-C)