인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.11
- 수록면
- 2,706 - 2,718 (13page)
- DOI
- 10.1007/s12540-022-01171-2
이용수
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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