About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Additive Manufacturing: Processing, Microstructure and Material Properties of Titanium-based Materials
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Presentation Title |
Multi-scale Strain, Microstructure, and Solidification Behavior of Ti-5553 Architected Lattice Melt Pools |
Author(s) |
Caleb Andrews, Maria Strantza, Tae Wook Heo, Nicholas Calta, Rongpei Shi, Manyalibo J Matthews, Mitra Taheri |
On-Site Speaker (Planned) |
Caleb Andrews |
Abstract Scope |
Laser powder bed additive manufacturing (L-PBF AM) enables the manufacture of advanced materials, like architected lattices or functionally graded structures, thanks to its ability to shape materials at the microscale. We demonstrate how the melt pool environment within a single Ti-5553 architected lattice strut can be altered by changes in strut angle and laser parameters through in situ X-ray imaging measurements. We relate these alterations to microstructure and stress development across length scales within these Ti-5553 lattice struts by utilizing HR-EBSD cross correlation, dynamical Kikuchi pattern simulation, and phase field modeling. We provide a nano-to-microscale approach to understanding how residual strain and microstructure formation within AM produced architected lattices are tied to the melt pool and solidification environment at the scale of a single lattice strut. Thus, we hope to further elucidate the mechanisms of residual stress formation in L-PBF and produce more robust and reliable architected materials. |