에너지 밀도 및 분말 증착 밀도를 고려한 직접 에너지 증착법 기반 Ti-6Al-4V 합금의 적층공정 최적화
KCI
- Title
- 에너지 밀도 및 분말 증착 밀도를 고려한 직접 에너지 증착법 기반 Ti-6Al-4V 합금의 적층공정 최적화
- Authors
- 이유경; 김은성; 천세호; 설재복; 성효경; 오정석; 김형섭; 이태경; 남태현; 김정기
- Date Issued
- 2021-12
- Publisher
- 한국분말재료학회
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110635
- DOI
- 10.4150/KPMI.2021.28.6.491
- ISSN
- 2799-8525
- Article Type
- Article
- Citation
- 한국분말재료학회지, vol. 28, no. 6, page. 491 - 496, 2021-12
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