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에너지 밀도 및 분말 증착 밀도를 고려한 직접 에너지 증착법 기반 Ti-6Al-4V 합금의 적층공정 최적화Additive Manufacturing Optimization of Directed Energy Deposition-Processed Ti-6Al-4V Alloy using Energy Density and Powder Deposition Density

Other Titles
Additive Manufacturing Optimization of Directed Energy Deposition-Processed Ti-6Al-4V Alloy using Energy Density and Powder Deposition Density
Authors
이유경김은성천세호설재복성효경오정석김형섭이태경남태현김정기
Issue Date
2021
Publisher
한국분말재료학회
Keywords
Directed Energy Deposition; Energy Density; Energy per unit area; Powder Deposition Density; Processing Optimization
Citation
한국분말재료학회지, v.28, no.6, pp.491 - 496
Indexed
KCI
Journal Title
한국분말재료학회지
Volume
28
Number
6
Start Page
491
End Page
496
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/4667
ISSN
2799-8525
Abstract
The process optimization of directed energy deposition (DED) has become imperative in the manufacture of reliable products. However, an energy-density-based approach without a sufficient powder feed rate hinders the attainment of an appropriate processing window for DED-processed materials. Optimizing the processing of DEDprocessed Ti-6Al- 4V alloys using energy per unit area (Eeff) and powder deposition density (PDDeff) as parameters helps overcome this problem in the present work. The experimental results show a lack of fusion, complete melting, and overmelting regions, which can be differentiated using energy per unit mass as a measure. Moreover, the optimized processing window (Eeff = 44~47 J/mm2 and PDDeff = 0.002~0.0025 g/mm2) is located within the complete melting region. This result shows that the Eeff and PDDeff-based processing optimization methodology is effective for estimating the properties of DED-processed materials.
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대학원 (나노신소재융합공학과)
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