About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
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| Presentation Title |
Compression behavior and microstructural analysis for mechanical properties evaluation of Inconel 718 lattice structures
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| Author(s) |
Daeun Jung, Sungmin Kang, Sangyul Ha, Sunggyu Kang, Kyungjun Lee, Hyokyung Sung |
| On-Site Speaker (Planned) |
Daeun Jung |
| Abstract Scope |
This study systematically analyzed the anisotropic compressive behavior and microstructural evolution of Inconel 718 lattice structures fabricated by laser powder bed fusion. Three lattice types Auxetic, Dode-thin, and Tesseract were fabricated, and specimens were tested under compression both parallel and perpendicular to the build direction, as well as in the as-built state. Deformation behavior varied with lattice geometry and compression direction, with the Tesseract structure showing the highest strength. These trends were well matched by FEM results. Electron backscatter diffraction analysis revealed that fine equiaxed grains formed at the lattice edges, while continuous columnar grains developed in the interior or in vertically oriented struts. Notably, these microstructural features differed among lattice types, and regions with a higher proportion of columnar grains exhibited larger grain sizes and stronger texture. This study demonstrates that microstructure and mechanical behavior vary locally within lattices, emphasizing the influence of geometry, microstructure, and strain. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Modeling and Simulation |