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Title: Use of fumed silica nanostructured additives in selective laser melting and fabrication of steel matrix nanocomposites
Authors: Koh, Hwee Kang
Moo, James Guo Sheng
Sing, Swee Leong
Yeong, Wai Yee
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Source: Koh, H. K., Moo, J. G. S., Sing, S. L. & Yeong, W. Y. (2022). Use of fumed silica nanostructured additives in selective laser melting and fabrication of steel matrix nanocomposites. Materials, 15(5), 1869-.
Journal: Materials 
Abstract: The advancement of additive manufacturing (AM) for metal matrix nanocomposites (MMNCs) is gaining enormous attention due to their potential improvement of physical and mechanical performance. When using nanostructured additives as reinforcements in 3D printed metal composites and with the aid of selective laser melting (SLM), the mechanical properties of the composites can be tailored. The nanostructured additive AEROSIL® fumed silica is both cost-effective and beneficial in the production of MMNCs using SLM. In this study, both hydrophobic and hydrophilic fumed silicas were shown to successfully achieve homogenous blends with commercial 316L stainless steel powder. The powder blends, which exhibited better flow, were then used to fabricate samples using SLM. The samples' microstructure demonstrated that smaller grains were present in the composites, resulting in improvements in mechanical properties by grain refinement compared to those of 316L stainless steel samples.
ISSN: 1996-1944
DOI: 10.3390/ma15051869
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
SC3DP Journal Articles

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