The effect of density and feature size on mechanical properties of isostructural metallic foams produced by additive manufacturing

Abstract

more authors) (2015) The effect of density and feature size on mechanical properties of isostructural metaffic foams produced by additive manufacturing. Acta Materialia, 85. 387 -395. ISSN 1359-6454 https://doi.org/10.1016/j.actamat. 2014.10.058 Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. 1The effect of density and feature size on mechanical properties of isostructural porous metals produced by additive manufacturing suggest that surface defects means the minimum size of features that can be created by EBM with similar strength to machined samples is around 1mm.

Porous γ-TiAl Structures Fabricated by Electron Beam Melting Process

“…For example, Hernández-Nava et al showed that identical structures of Ti-6Al-4V and aluminum had different compression behavior [27]. Table 4 lists the results of the compression test performed on the porous blocks.…”

“…After the upward curving ends, the linear elastic region sets in. The upward curve is generally associated with porous structures because it takes a certain time for the machine platens to come into full contact with the specimen faces [27]. None of the curves had a distinct plateau region.…”

Open Celled Porous Titanium

“…11, showing how the value of E changes with the relative density of a series of randomly-structured porous samples made from non-alloyed titanium. The majority of reported data Data are from [15, 20, 22, 25, 35, 41, 47, 55-57, 60, 66, 67, 90-100] [73,[101][102][103][104][105][106][107][108][109][110] . Fig.…”

“…Additive methods have recently been widely used to fabricate regular lattice structures from titanium, and even random structured porous sponges (produced by using X-ray Tomography to generate an image of a random pack of glass spheres, and then inverting the image to produce the build file [73] ).…”

X-ray Tomography Characterisation of Lattice Structures Processed by Selective Electron Beam Melting

“…Additive manufacturing (AM), which proceeds by sequential micro-additions of material following a computer aided design (CAD), allows the fabrication of complex geometries, such as intricate cellular solids, as previously reported [1]. Selective Electron Beam Melting (SEBM) is one AM route that is becoming increasingly popular.…”