Journal
MATERIALS LETTERS
Volume 190, Issue -, Pages 138-142Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.12.130
Keywords
Electron Beam Melting; Lattices; Size effects; Titanium
Funding
- EPSRC, Centre for Doctoral Training in Advanced Metallic Systems [EP/G036950]
- GRIN Aerospace
- Engineering and Physical Sciences Research Council [EP/L025213/1, 1360371] Funding Source: researchfish
- EPSRC [EP/L025213/1] Funding Source: UKRI
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In experimental work on the mechanical properties of stochastic metal foams, the consensus is that a minimum of six pores along each direction are required to give representative mechanical properties. This theory is tested for another porous metal, regular lattices, built using repeating unit cells of the diamond structure (a tetrahedral structure, in a cubic formation) by Electron Beam Melting (EBM) from grade 5 Ti6Al4V. Samples with different numbers of unit cells are made, using 3 different sets of EBM manufacturing conditions, and tested in compression. In all cases, a minimum of four unit cells are needed to ensure that size-independent mechanical properties are measured. Small changes in manufacture lead to large differences in properties. (C) 2017 The Authors. Published by Elsevier B.V.
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