Design and Thermal Comparison of Random Structures Realized by Indirect Additive Manufacturing.

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ID: 54166
2019
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Ranked #216 of 812 articles by views in Materials (Basel, Switzerland)

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Abstract
Additive manufacturing (AM) processes are used to fabricate three-dimensional complex geometries. There are several technologies that use laser or electron beam over metal powder beds. However, the direct AM processes have inconveniences such as specific set of materials, high thermal stress traced, high local energy absorbed, poor surface finish, anisotropic properties, high cost of material powder, and manufacturing with high-power beams. In this paper, an alternative process was developed. An indirect additive manufacturing (I-AM) combining a 3D print of castable resin and metal casting in order to obtain a cellular structure similar in shape to commercial metal foams but completely definable as design features was developed. Design of the cellular structure was made by the graphical algorithm editor Grasshopper. Designed structures were realized by a lost-wax casting process and compared with commercial foam specimens by a system designed for this work. The designed metal foams showed a performance superior to that of commercial metal foam; in particular, the heat thermal coefficient of designed metal foams in the better case was 870 W/m·K, almost doubled in comparison with the commercial foam tested in this work.
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almonti2019designmaterials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Almonti, Daniele;Ucciardello, Nadia;
Journal Materials (Basel, Switzerland)
Year 2019
DOI
E2261
URL
Keywords
additive manufacturing metal foam open cell random structure thermal test

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