About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing and Cellular/Lattice Structures: Designs, Realization and Applications
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Presentation Title |
Effect of Geometrical Characteristics on the Mechanical Properties of Co-Cr-Mo Triply Periodic Minimal Surface Lattices Fabricated by Laser-Powder Bed Fusion |
Author(s) |
So-Yeon Park, Kyu-Sik Kim, Bandar AlMangour, Kee-Ahn Lee |
On-Site Speaker (Planned) |
So-Yeon Park |
Abstract Scope |
Node-free minimal surfaces sheet-based lattices can have excellent mechanical properties than typical truss type lattices. Their mechanical properties can be controllable by adjusting unit cell parameters (unit cell size, wall thickness, etc.). In this study, Co-Cr-Mo alloy sheet lattices were manufactured by using laser-powder bed fusion (L-PBF). Among the minimal surface model, Neovius and I-WP were selected with different unit cell sizes (1~5mm). And their mechanical properties were investigated. In the results of tensile tests, yield strengths, stiffness values and elongations of Neovius were higher than I-WP in all unit cell sizes. Moreover, compressive energy absorption properties of Neovius were also superior. EBSD and Digital image correlation analysis was performed to analyze the micro to macro deformation behaviors by topology, and to determine the interaction of the microstructure and topology. Based on the results, the deformation behavior of the Co-Cr-Mo sheet lattice fabricated by the L-PBF were also discussed. |