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 |
Investigation of Microstructure Formation in Plasma Arc Additive Manufacturing Processes by SEM-Based Heating Studies |
Author(s) |
Christina Koenig, Alice Bastos da Silva, Joerg Jinschek |
On-Site Speaker (Planned) |
Alice Bastos da Silva |
Abstract Scope |
Non-equilibrium heating and cooling conditions in plasma-arc additive manufacturing (PLAAM) produces metal components with anisotropic microstructures. The inherent cyclic heat inputs during PLAAM introduce additional complexities, affecting element diffusion, phase transitions, and grain morphology. This study focuses on the development of an in-situ scanning electron microscopy (SEM) approach to simulate the heating profile on a sufficiently large sample relative to typical grain sizes in AM components. COMSOL simulations are used to predict temperature distributions when using MEMS-SEM microheaters, while temperature validation is conducted using thermal camera measurements. In a quasi in-situ approach, PLAAM samples undergo cyclic heating, and SEM imaging and electron backscatter diffraction (EBSD) techniques are utilized to analyze dynamic changes in the microstructure after each heating cycle, mimicking the layer-by-layer PLAAM process. The findings highlight the potential of SEM-based heating studies for a comprehensive understanding of microstructure formation during PLAAM fabrication |
Proceedings Inclusion? |
Planned: |