Fabrication and Mechanical Characterisation of Titanium Lattices with Graded Porosity

By W. V. Grunsven, E. Hernández-Nava, G. Reilly, Russell Goodall, S. Robert. 2014

142 citations recorded by the source corpus.

Electron Beam Melting (EBM) is an Additive Manufacturing technique which can be used to fabricate complex structures from alloys such as Ti6Al4V, for example for orthopaedic applications. Here we describe the use of EBM for the fabrication of a novel Ti6Al4V structure of a regular diamond lattice incorporating graded porosity, achieved via changes in the strut cross section thickness. Scanning Electron Microscopy and micro computed tomography analysis confirmed that generally EBM reproduced the CAD design of the lattice well, although at smaller strut sizes the fabricated lattice produced thicker struts than the model. Mechanical characterisation of the lattice in uniaxial compression showed that its behaviour under compression along the direction of gradation can be predicted to good accuracy with a simple rule of mixtures approach, knowing the properties and the behaviour of its constituent layers.

Subfields: Automotive Engineering, Biomedical Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/18b429ef18a13ba26e4ed78eba35413711fb1506

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In Automotive Engineering

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Citations in the corpus

An investigation into reinforced and functionally graded lattice structures (2017, background): “van Grunsven et al.(24) suggested that the progressive deformation and collapse of increasingly dense layers could be useful in applications such as surgical implants and could offer protection from dynamic loads.”