About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques III
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Presentation Title |
F-28: Phase Evolution during Multi-material Laser Powder-Bed Fusion via Operando Synchrotron X-ray Diffraction and Imaging |
Author(s) |
Andaç Özsoy, Steven Van Petegem |
On-Site Speaker (Planned) |
Steven Van Petegem |
Abstract Scope |
Laser powder-bed fusion (LPBF) of multi-material components is a rapidly growing field with a wide range of potential applications. To realize this potential, a comprehensive understanding of the microstructural evolution during the printing process is necessary. In this study, we report on operando X-ray based experiments during multi-material LPBF of various combinations of 316L and 17-4 PH stainless steels, Inconel 625, and CuCrZr, with a focus on the interfacial regions. Operando X-ray diffraction reveals the presence of the expected fcc structure at the Inconel 625/316L interface and an fcc-bcc mixture at the Inconel 625/17-4 PH interface. On the other hand, while the alloying elements did not produce any detrimental intermetallics, phase separation and formation of unexpected phases have been observed at the CuCrZr/316L, CuCrZr/17-4PH and CuCrZr/Inconel 625 interfaces. Furthermore, fast operando X-ray radiography allows tracking the evolution of various microstructural features such as cracking, pores and melt pool shape. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Phase Transformations |