About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Process-induced Microstructures and Defects
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Presentation Title |
F-73: Additive Manufacturing of a Martensitic Chromium Steel: Process Parameters, Microstructure and Mechanical Properties |
Author(s) |
Nicole Ofner, Sabine Bodner, Christin Aumayr, Christoph Turk, Liang Wu, Witalij Gridin, Jozef Keckes |
On-Site Speaker (Planned) |
Nicole Ofner |
Abstract Scope |
Laser beam powder bed fusion (LB-PBF) of martensitic chromium steels is challenging due to their high susceptibility to cracking. Hence, the aim of this study was to find optimized process parameters for LB-PBF to produce a crack-free martensitic chromium steel with a maximum platform preheating of 200 °C. A design-of-experiments model including laser power, scanning speed and hatch distance was set up to determine an optimized process parameter set. 18 cubes were printed using the combination of the specified energy input. Metallography analysis was performed to select the best parameter combinations. Thus, densities exceeding 99% could be achieved. Furthermore, the most suitable process parameter(s) were assessed through tensile and hardness tests. Additionally, microstructure was characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, electron backscatter diffraction and X-ray diffraction. It was possible to obtain a complete information on the microstructure and phase occurrence within the 3D-printed martensitic chromium steel. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Iron and Steel |