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Damping behavior of 316L lattice structures produced by Selective Laser Melting
Summary
Researchers used a metal 3D-printing technique called Selective Laser Melting to produce steel specimens with internal lattice structures and measured how well these structures absorbed vibration (damping capacity). The study found that lattice structures can be engineered to improve energy absorption relative to their weight, relevant to manufacturing and not directly related to microplastics.
Selective Laser Melting is a powder-bed additive manufacturing technology that allows producing fully-dense metal objects with complex shapes and high mechanical properties. In this work, Selective Laser Melting was used to produce 316L specimens including lattice structures with the aim of exploring the possibility given by additive manufacturing technologies to produce parts with increased damping capacity, especially in relation to their weight. The internal friction of bulk and lattice specimens was measured in terms of delay between stress and deformation (i.e. tanδ) for different applied loads and frequencies. A finite element model was used to design the test and microstructure investigations were performed to support the results obtained by dynamo-mechanical tests.
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