Evaluations of cellular lattice structures manufactured using selective laser melting

Yan, Chunze; Hao, Liang; Hussein, Ahmed Yussuf; Raymont, David

doi:10.1016/j.ijmachtools.2012.06.002

Cited by 566 publications

(315 citation statements)

References 10 publications

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“…The reduction in modulus over the full range of cell size is ∼ 64%. As previously discussed, Yan et al observed a smaller reduction (21%) in the modulus of their latticed parts with increasing cell size and attributed it to decreasing strut density [13]. X-ray computed tomography (CT) measurements of a sample of our 5 and 7 mm latticed bars put the strut density at (97.6 ± 0.2)%, with little variation between parts and no correlation between density and cell size.…”

Section: A the Modulussupporting

confidence: 52%

“…Its presence is related to the choice of laser processing parameters and the morphology of the feedstock powder. It has been previously observed attached to the struts of SLM lattice structures [6,13,32]. In the case of our latticed structures, loosely bound powder may have a larger effect for smaller cells, where the dimensions of the struts and nodes are smallest.…”

Section: B Anomalous Behaviour Of the Smallest Cellsmentioning

confidence: 47%

“…Notably, Yan et al studied Shoen gyroidal cells, made by SLM from 316 L stainless steel, and observed a reduction in Young's modulus from ∼ 306 to 241 MPa upon increasing the cell size from 2 to 8 mm [13].…”

Section: B Cell Size Dependence Of the Mechanical Propertiesmentioning

confidence: 99%

“…The first of these factors has received some prior attention [6][7][8][9], largely because of the similarity between lattice structures and the more well established foams, while the second has received very little [13].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size

et al. 2015

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. (2015) Mechanical properties of Ti-6Al-4V selectively laser melted parts with body-centred-cubic lattices of varying cell size. Experimental Mechanics, 55 (7). pp. 1261 -1272 . ISSN 1741 -2765 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/31973/1/Accepted_manuscript.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Significant weight savings in parts can be made through the use of additive manufacture (AM), a process which enables the construction of more complex geometries, such as functionally graded lattices, than can be achieved conventionally. The existing framework describing the mechanical properties of lattices places strong emphasis on one property, the relative density of the repeating cells, but there are other properties to consider if lattices are to be used effectively. In this work, we explore the effects of cell size and number of cells, attempting to construct more complete models for the mechanical performance of lattices. This was achieved by examining the modulus and ultimate tensile strength of latticed tensile specimens with a range of unit cell sizes and fixed relative density. Understanding how these mechanical properties depend upon the lattice design variables is crucial for the development of design tools, such as finite element methods, that deliver the best performance from AM latticed parts. We observed significant reductions in modulus and strength with increasing cell size, and these reductions cannot be explained by increasing strut porosity as has previously been suggested. We obtained power law relationships for the mechanical properties of the latticed specimens as a function of cell size, which are similar in form to the existing laws for the relative density dependence. These can be used to predict the properties of latticed column structures comprised of body-centred-cubic (BCC) cells, and may also be adapted for other part geometries. In addition, we propose a novel way to analyse the tensile modulus data, which considers a relative lattice cell size rather than an absolute size. This may lead to more general models for the mechanical properties of lattice structures, applicable to parts of varying size.

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Section: A the Modulussupporting

confidence: 52%

Section: B Anomalous Behaviour Of the Smallest Cellsmentioning

confidence: 47%

Section: B Cell Size Dependence Of the Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size

et al. 2015

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“…Three main challenges need to be solved to make lattice structures a real option for the use in functional parts in different industries. The mechanical properties of different lattice structure types were studied by several researchers (Löber 2011;Shen 2010Shen , 2012Yan 2012;Rehme 2009;Gümrück 2013;Smith 2013;Ushijima 2011). Nevertheless, there is no comprehensive collection of mechanical properties of lattice structures under compressive, tensile, shear and dynamic load.…”

Section: Functional Adapted Lattice Structures and Slmmentioning

confidence: 99%

SLM Production Systems: Recent Developments in Process Development, Machine Concepts and Component Design

Poprawe

Hinke

Schrage

et al. 2014

Lecture Notes in Production Engineering

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The emerging Additive Manufacturing (AM) and especially the Selective Laser Melting (SLM) technologies provide great potential for solving the dilemma between scale and scope, i.e. manufacturing products at mass production costs with a maximum fit to customer needs or functional requirements. Due to technology intrinsic advantages like one-piece-flow capability and almost infinite freedom of design, Additive Manufacturing was recently even described as "the manufacturing technology that will change the world". Due to the complex nature of production systems, the technological potential of AM and especially SLM can only be realised by a holistic comprehension of the complete value creation chain, especially the interdependency between products and production processes. Therefore this paper aims to give an overview regarding recent research in machine concepts and process development as well as component design which has been carried out within the cluster of excellence "Integrative production technology for high wage countries".

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Microstructures of Inconel 718 by Selective Laser Melting

Gong¹,

Chou²

2015

TMS2015 Supplemental Proceedings

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Evaluations of cellular lattice structures manufactured using selective laser melting

Cited by 566 publications

References 10 publications

Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size

Mechanical Properties of Ti-6Al-4V Selectively Laser Melted Parts with Body-Centred-Cubic Lattices of Varying cell size

SLM Production Systems: Recent Developments in Process Development, Machine Concepts and Component Design

Microstructures of Inconel 718 by Selective Laser Melting

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