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Materials 2013, 6(8), 3451-3468; doi:10.3390/ma6083451
Article

Manufacturing and Characterization of 18Ni Marage 300 Lattice Components by Selective Laser Melting

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Received: 7 May 2013; in revised form: 18 July 2013 / Accepted: 6 August 2013 / Published: 13 August 2013
(This article belongs to the Section Manufacturing Processes and Systems)
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Abstract: The spreading use of cellular structures brings the need to speed up manufacturing processes without deteriorating mechanical properties. By using Selective Laser Melting (SLM) to produce cellular structures, the designer has total freedom in defining part geometry and manufacturing is simplified. The paper investigates the suitability of Selective Laser Melting for manufacturing steel cellular lattice structures with characteristic dimensions in the micrometer range. Alternative lattice topologies including reinforcing bars in the vertical direction also are considered. The selected lattice structure topology is shown to be superior over other lattice structure designs considered in literature. Compression tests are carried out in order to evaluate mechanical strength of lattice strut specimens made via SLM. Compressive behavior of samples also is simulated by finite element analysis and numerical results are compared with experimental data in order to assess the constitutive behavior of the lattice structure designs considered in this study. Experimental data show that it is possible to build samples of relative density in the 0.2456–0.4367 range. Compressive strength changes almost linearly with respect to relative density, which in turns depends linearly on the number of vertical reinforces. Specific strength increases with cell and strut edge size. Numerical simulations confirm the plastic nature of the instability phenomena that leads the cellular structures to collapse under compression loading.
Keywords: SLM; steel powder; lattice structures; mechanical tests; finite element analysis SLM; steel powder; lattice structures; mechanical tests; finite element analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Contuzzi, N.; Campanelli, S.L.; Casavola, C.; Lamberti, L. Manufacturing and Characterization of 18Ni Marage 300 Lattice Components by Selective Laser Melting. Materials 2013, 6, 3451-3468.

AMA Style

Contuzzi N, Campanelli SL, Casavola C, Lamberti L. Manufacturing and Characterization of 18Ni Marage 300 Lattice Components by Selective Laser Melting. Materials. 2013; 6(8):3451-3468.

Chicago/Turabian Style

Contuzzi, Nicola; Campanelli, Sabina L.; Casavola, Caterina; Lamberti, Luciano. 2013. "Manufacturing and Characterization of 18Ni Marage 300 Lattice Components by Selective Laser Melting." Materials 6, no. 8: 3451-3468.


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