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논문 기본 정보

자료유형
학술저널
저자정보
Hyo Moon Joo (Hyundai Motor Group) Woo Chul Kim (Yonsei University) Youn Il Jung (Hyundai Motor Group) Han Jae Kim (Hyundai Motor Group) Seong Jin Kim (Hyundai Motor Group) Yeong Cheol Jo (Hyundai Motor Group) Wang Hyun Yong (Hyundai Motor Group) Do Hyang Kim (Yonsei University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.5
발행연도
2024.5
수록면
1,294 - 1,306 (13page)
DOI
10.1007/s12540-023-01567-8

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In the present study, microstructural characteristics, compression behavior and energy absorption property of AlSi10Mg OctetTruss, FCC and Tetra lattice structures with volume fraction of 30%, 50%, and 70% produced using Laser-based powder bedfusion (L-PBF) method have been investigated. Proper selection of processing parameters for L-PBF enables high internaland surface quality even though node and strut in the lattice structure are very thin. AlSi10Mg lattice structure consists ofa cellular structure composed of α-Al and intercellular eutectic Si. With heat treatment, needle shape Mg2Siprecipitates inthe α-Al matrix. Octet Truss, FCC and Tetra lattice structures show similar compression fracture behavior. The maximumfracture forces for Octet Truss, FCC and Tetra lattice structures (70% volume fraction) are 22.0 kN, 23.7 kN and 23.7 kN,respectively, while the energy absorption values up to 8 mm displacement are 128.1 J, 126.0 J and 88.9 J, respectively. Withheat treatment, the maximum fracture force and the absorbed energy decreased when compared to those in as-built condition. When considering application of AlSi10Mg alloy lattice structure in shock absorbing part, FCC lattice structure with70% volume fraction exhibits the most optimum combination of mechanical property and shock absorption characteristics.

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