Selective laser melting (SLM) of AlSi12Mg lattice structures

Leary, Martin; Mazur, Maciej; Elambasseril, Joe; McMillan, Matthew; Chirent, Thomas; Sun, Yingying; Qian, Ma; Easton, Mark; Brandt, Milan

doi:10.1016/j.matdes.2016.02.127

Cited by 415 publications

(177 citation statements)

References 58 publications

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“…SLM parts can suffer from cracks [16], pores [17], poor surface roughness, and high residual stresses [18] arising from the high energy density {energy density = laser power / (scan speed * hatch spacing * layer thickness) [19]} induced by the process and subsequent fast solidification [20,21] and high thermal gradients. SLM materials also have distinctive microstructures [22] when compared to conventionally processed materials.…”

Section: Introductionmentioning

confidence: 99%

Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality

et al. 2016

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Selective laser melting (SLM) is being widely utilised to fabricate intricate structures used in various industries. Widening the range of applications that can benefit from such promising technology requires validating SLM parts in load bearing applications. Recent studies have mainly focussed on static loading, with minor attention to cyclic loading despite its vital importance in many applications.In this work, the fatigue performance of SLM AlSi10Mg was investigated considering the effects of surface quality and heat treatment. Compared to heat treatment, machining the samples played a minor role in improving the fatigue behaviour. This is potentially attractive to industries interested in latticed structures and topology-optimised parts where post-processing machining is not feasible. The characteristically fine microstructure in the as-built samples provided good fatigue crack propagation resistance but none of them survived nominal fatigue life of 3x10 7 cycles within the maximum stress range of 63-220 MPa. A specially-tailored heat treatment increased the material's ductility, significantly improving its fatigue performance. At 94 MPa, the heat-treated samples survived beyond the nominal fatigue life, outperforming the reference cast material. The combined effect of machining and heat treatment yielded parts with far superior fatigue properties, promoting the material for a wider range of applications.

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Section: Introductionmentioning

confidence: 99%

Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality

et al. 2016

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“…Leary et al [52] found that downward facing surfaces of inclined struts had higher surface roughness than upward facing surfaces. They worked on overhanging struts having inclinations of 0, 35.26, 45 and 90 • being made up of AlSi12Mg by using SLM.…”

Section: Introductionmentioning

confidence: 99%

Numerical prediction of the printable density range of lattice structures for additive manufacturing

2017

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Structured cellular structures are nowadays printed using additive manufacturing methods like powder bed fusion. The relative density of the cellular structures has a big role in the suitability of a lattice for printing due to the minimum printable radius constraint and powder being trapped inside an inclusion. In this work, the theoretical limits of the printable range of relative density of different lattice types are found based on the cell size using computer methods by leaving other process parameters for further research as the current parameters are the most basic ones. The results are approximated using simple polynomials to enable practical usage.

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“…SLM technology was used in the study of trabecular structures of 316L stainless steel [31][32][33][34][35][36][37] and aluminum alloys such as AlSi10Mg [21,22,[38][39][40]. Al alloys are particularly suited for the application described in the present paper, as Al alloys show excellent thermal conductivity and excellent corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

A Robust Multifunctional Sandwich Panel Design with Trabecular Structures by the Use of Additive Manufacturing Technology for a New De-Icing System

et al. 2017

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Anti-ice systems assure a vital on-board function in most aircraft: ice prevention or de-icing is mandatory for all aerodynamic surfaces to preserve their performance, and for all the movable surfaces to allow the proper control of the plane. In this work, a novel multi-functional panel concept which integrates anti-icing directly inside the primary structure is presented. In fact, constructing the core of the sandwich with trabecular non-stochastic cells allows the presence of a heat exchanger directly inside the structure with a savings in weight and an improvement in thermal efficiency. This solution can be realized easily in a single-piece component using Additive Manufacturing (AM) technology without the need for joints, gluing, or welding. The objective of this study is to preliminarily investigate the mechanical properties of the core constructed with Selective Laser Melting (SLM); through the Design of Experiment (DOE), different design parameters were varied to understand how they affect the compression behaviour.

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Selective laser melting (SLM) of AlSi12Mg lattice structures

Cited by 415 publications

References 58 publications

Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality

Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality

Numerical prediction of the printable density range of lattice structures for additive manufacturing

A Robust Multifunctional Sandwich Panel Design with Trabecular Structures by the Use of Additive Manufacturing Technology for a New De-Icing System

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