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Open AccessArticle

Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion

1
Department of Materials Science and Metallurgical Engineering, Sunchon National University, Suncheon, Jeollanam-do 57922, Korea
2
Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
3
Aichi Center for Industry and Science Technology, 1267-1 Akiai, Yakusa-cho, Toyota 470-0356, Japan
*
Author to whom correspondence should be addressed.
Materials 2020, 13(18), 3927; https://doi.org/10.3390/ma13183927
Received: 26 July 2020 / Revised: 24 August 2020 / Accepted: 2 September 2020 / Published: 5 September 2020
(This article belongs to the Special Issue New Materials and Understandings in Selective Laser Melting (SLM))
This study provides a novel approach to fabricating Al/C composites using laser powder bed fusion (LPBF) for a wide range of structural applications utilizing Al-matrix composites in additive manufacturing. We investigated the effects of LPBF on the fabrication of aluminum/multiwalled carbon nanotube (Al/MWCNT) composites under 25 different conditions, using varying laser power levels and scan speeds. The microstructures and mechanical properties of the specimens, such as elastic modulus and nanohardness, were analyzed, and trends were identified. We observed favorable sintering behavior under laser conditions with low energy density, which verified the suitability of Al/MWCNT composites for a fabrication process using LPBF. The size and number of pores increased in specimens produced under high energy density conditions, suggesting that they are more influenced by laser power than scan speed. Similarly, the elastic modulus of a specimen was also more affected by laser power than scan speed. In contrast, scan speed had a greater influence on the final nanohardness. Depending on the laser power used, we observed a difference in the crystallographic orientation of the specimens by a laser power during LPBF. When energy density is high, texture development of all samples tended to be more pronounced. View Full-Text
Keywords: metal–matrix composite; ball milling; laser powder bed fusion; microstructures; nanoindentation metal–matrix composite; ball milling; laser powder bed fusion; microstructures; nanoindentation
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MDPI and ACS Style

Lee, E.R.; Shin, S.E.; Takata, N.; Kobashi, M.; Kato, M. Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion. Materials 2020, 13, 3927.

AMA Style

Lee ER, Shin SE, Takata N, Kobashi M, Kato M. Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion. Materials. 2020; 13(18):3927.

Chicago/Turabian Style

Lee, Eo R.; Shin, Se E.; Takata, Naoki; Kobashi, Makoto; Kato, Masaki. 2020. "Manufacturing Aluminum/Multiwalled Carbon Nanotube Composites via Laser Powder Bed Fusion" Materials 13, no. 18: 3927.

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