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논문 기본 정보

자료유형
학술저널
저자정보
(King Abdulaziz City for Science and Technology) (King Abdulaziz City for Science and Technology) (The University of Adelaide) (King Abdulaziz City for Science and Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.11
발행연도
수록면
2,706 - 2,718 (13page)
DOI
10.1007/s12540-022-01171-2

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초록· 키워드

The present work investigates the mechanical properties of as-built laser powder bed fusion (L-PBF) Aluminium 7068 alloys,together with microstructural characterization. To achieve this, micro-pillar compression (in-situ) was conducted and thestate of the materials under compression were correlated with respective stress–strain curves. A cast alloy of similar bulkcomposition was also investigated, under identical conditions, as a benchmark material. As opposed to the larger sphericalgrains (about 4 μm) of the cast alloy, the L-PBF alloy exhibited typical ‘melt pool’ meso-structure, combined with refinedmicrostructure induced by rapid cooling and gave rise to sub-micron range grain sizes. The mechanical properties of theL-PBF alloy are anisotropic in nature, due to its bi-modal type meso- and micro-structure. Cross-sectional SEM investigationwas carried out on deformed micro-pillars and revealed that there exist numerous slip and shear plane networks that servedas load accommodation mechanism during compression.
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