3차원 적층 제조 공정(DED) 기반 Al-6061+Al-12Si 합금 조합 실험
Combinatorial Experiment for Al-6061 and Al-12Si alloy Based on Directed Energy Deposition (DED) Process
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Aluminum alloys, known for their high strength-to-weight ratios and impressive electrical and thermal conductivities, are extensively used in numerous engineering sectors, such as aerospace, automotive, and construction. Recently, significant efforts have been made to develop novel aluminum alloys specifically tailored for additive manufacturing. These new alloys aim to provide an optimal balance between mechanical properties and thermal/ electrical conductivities. In this study, nine combinatorial samples with various alloy compositions were fabricated using direct energy deposition (DED) additive manufacturing by adjusting the feeding speeds of Al6061 alloy and Al-12Si alloy powders. The effects of the alloying elements on the microstructure, electrical conductivity, and hardness were investigated. Generally, as the Si and Cu contents decreased, electrical conductivity increased and hardness decreased, exhibiting trade-off characteristics. However, electrical conductivity and hardness showed an optimal combination when the Si content was adjusted to below 4.5 wt%, which can sufficiently suppress the grain boundary segregation of the α- Si precipitates, and the Cu content was controlled to induce the formation of Al2Cu precipitates.
Abstract
Aluminum alloys, known for their high strength-to-weight ratios and impressive electrical and thermal conductivities, are extensively used in numerous engineering sectors, such as aerospace, automotive, and construction. Recently, significant efforts have been made to develop novel aluminum alloys specifically tailored for additive manufacturing. These new alloys aim to provide an optimal balance between mechanical properties and thermal/ electrical conductivities. In this study, nine combinatorial samples with various alloy compositions were fabricated using direct energy deposition (DED) additive manufacturing by adjusting the feeding speeds of Al6061 alloy and Al-12Si alloy powders. The effects of the alloying elements on the microstructure, electrical conductivity, and hardness were investigated. Generally, as the Si and Cu contents decreased, electrical conductivity increased and hardness decreased, exhibiting trade-off characteristics. However, electrical conductivity and hardness showed an optimal combination when the Si content was adjusted to below 4.5 wt%, which can sufficiently suppress the grain boundary segregation of the α- Si precipitates, and the Cu content was controlled to induce the formation of Al2Cu precipitates.
참고문헌 (16)
- B. Stojanovic, , Appl. Eng. Lett, 3, pp.52~ (2018)
- R. A. Michi, , Int. Mater. Rev, 67, pp.298~ (2022)
- S. Z. Han, , Prog. Mater. Sci, 117, pp.100720~ (2021)
- J. M. Sanchez, , Sci. Rep, 9 (2019)
- F. M. Dambietz, , Lasers in Manufacturing Conference 2021, pp.1~ (2021)
- 박수원, "Multi-feeder 3차원 적층제조 기반 조합실험을 활용한 알루미늄 합금탐색", 한국분말재료학회지, 30(3), pp.255~261 (2023), 한국분말재료학회
- D. Eisenbarth, , Addit. Manuf, 35, pp.101298~ (2020)
- 안동규, "Directed Energy Deposition (DED) Process: State of the Art", International Journal of Precision Engineering and Manufacturing-Green Technology, 8(2), pp.703~742 (2021), 한국정밀공학회[DOI]
- A. D. Iams, , Powder Technol, 396, pp.316~ (2022)
- M. Liu, , Procedia Manuf, 53, pp.507~ (2021)
- P. A. Hooper, , Addit. Manuf, 22, pp.548~ (2018)
- H. Zhao, , Metall. Mater. Trans. B, 32B, pp.163~ (2001)
- H. Shen, , Materials, 13, pp.4157~ (2020)
- D. K. Koli, , Procedia Mater. Sci, 6, pp.567~ (2014)
- H. Ye, , J. Alloys Compd, 885, pp.161117~ (2021)
- M. Kaltenbrunner, , Nature, 499, pp.458~ (2013)