About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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Presentation Title |
Evaluation of Surface and Sub-Surface Cracking of Laser Powder Bed Fusion Additively Manufactured H230 |
Author(s) |
Drew Davidson, Laura Wilson, Christopher Kantzos, Evia Rodriguez |
On-Site Speaker (Planned) |
Drew Davidson |
Abstract Scope |
Haynes 230, a Ni-Cr-W-Mo alloy, isn't commonly Addictively Manufactured (AM) for applications in thermocouple protection tubes, heat exchangers, and combustion cans due to the cracks formed during solidification. AM Haynes 230 samples were printed using Laser Powder Bed Fusion and machined into tensile bars to conduct mechanical testing along both parallel and perpendicular to the build direction. These bars consist of thermally cycled, for an hour at 1200°C for 1 hour, and non-thermally cycled bars. After testing, fractography was done on the tensile bars to get a better look at the cracking phenomena. Printed samples were then polished metallographically and taken to optical microscopy to see any variability of cracking. Crack tips found in optical imaging were milled into foils using Focused Ion Beam – Scanning Electron Microscopy to look at chemical composition and grain structure near the crack using Energy Dispersive X-Ray Spectroscopy (EDS) and Electron Backscatter Diffraction (EBSD). |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, |