Microstructure and mechanical properties of aluminium alloy cellular lattice structures manufactured by direct metal laser sintering

Yan, Chunze; Hao, Liang; Hussein, Ahmed Yussuf; Young, Paul A.; Huang, Juntong; Zhu, Wei

doi:10.1016/j.msea.2015.01.063

Cited by 258 publications

(116 citation statements)

References 31 publications

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“…According to the authors Pariona et al [8], the presence of the protuberances is more perceptible in Al-1.5 wt% Fe alloy than Al-2.0 wt% Fe alloy. In Figure 1(a) it's observed, the overlapping lines and being more magnified in Figure 1(b), these highlighted lines are due to the overlapping of consecutive weld fillets, this phenomenon was also observed by the authors Yan et al [9], they have verified, which the melt pools are overlapping one with other.…”

Section: Microstructural Studysupporting

confidence: 68%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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The laser surface remelting (LSR) treatment was performed to Al-2.0 wt% Fe alloy with a 2 kW Yb-fiber laser (IPG YLR-2000S). The substrate and laser-treated material characterization were executed using different techniques. Among them, the microstructure was analyzed by optical microscope, SEM, low-angle X-ray diffraction (LAXRD) and the corrosion test was made in aerated solution of 0.1 M H 2 SO 4 at a temperature of 25˚C ± 0.5˚C. As result was shown, the micrograph of LSR-treated material displaying can be a fine cellular structure and the existence of certain nanoporosities and a similar to a nano-dendritic growth was observed too. The characteristic of melted zone was constituted of metastable phases according to the result of x-rays and the behavior corrosion as a result of the LSR-treated sample, which it was shown to be more resistant to corrosion than the untreated sample. A comparative study was carried out of the cyclic polarization of the laser-treated and untreated samples, demonstrating that the reduction and oxidation reverse peaks were not observed and being the cyclic polarization behavior was of irreversible character in both samples, however, the LSR-treated sample propitious the passivity on the surface also reduced the corrosion phenomena. Wherefore, this type of laser-treated alloy can be applied in the aerospace, aeronautic and automobilist industries.

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Section: Microstructural Studysupporting

confidence: 68%

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Pariona¹,

Micene²

2017

ACES

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“…Al-Si10-Mg was examined here as it is a well-established hardenable alloy, with Mg 2 Si particles being the main strengthening precipitate [31,32], and has received prior attention in the field of SLM [14,19,20,23]. X-ray CT has previously been employed to study porosity in Al-Si-Cu castings [33], aluminium and ceramic foams [34,35], and SLM stainless steel 316L [36], while pore quantification methods have been used by Marcu Puscas et al [37], Pavanti et al [38], Shen et al.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…These include a level of design freedom which is unconstrained by the limitations of tool accessibility [1,2]. Complex shapes, including those that stem from the use of weight saving topology optimisation [3][4][5][6] or lattice structures [7][8][9][10][11][12][13][14][15][16] can be manufactured with no additional cost or energy expenditure compared to traditional forms; in many cases the advantages of AM lie in its facility to produce shapes that are not achievable by other means. Additional benefits include low material wastage and a reduction of the number of manufacturing steps [1,2,17,18].…”

Section: Introductionmentioning

confidence: 99%

Quantification and characterisation of porosity in selectively laser melted Al–Si10–Mg using X-ray computed tomography

Maskery

Aboulkhair

Corfield

et al. 2016

Materials Characterization

259

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. (2016) Quantification and characterisation of porosity in selectively laser melted Al-Si10-Mg using x-ray computed tomography. Materials Characterization, 111 . pp. 193-204. ISSN 1873-4189 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/31972/1/CT_paper_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 Creative Commons Attribution Non-commercial No Derivatives licence and may be reused according to the conditions of the licence. For more details see: http://creativecommons.org/licenses/by-nc-nd/2.5/ 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 ACCEPTED MANUSCRIPT 2 AbstractWe used X-ray computed tomography (CT), microscopy and hardness measurements to study AlSi10-Mg produced by selective laser melting (SLM). Specimens were subject to a series of heat treatments including annealing and precipitation hardening. The specimen interiors were imaged with X-ray CT, allowing the non-destructive quantification and characterisation of pores, including their spatial distribution. The specimens had porosities less than 0.1%, but included some pores with effective cross-sectional diameters up to 260 µm. The largest pores were highly anisotropic, being flat and lying in the plane normal to the build direction. Annealing cycles caused significant coarsening of the microstructure and a reduction of the hardness from (114 ± 3) HV, in the as-built state, to (45 ± 1) HV, while precipitation hardening increased this to a final hardness of (59 ± 1) HV.The pore size and shape distributions were unaffected by the heat treatments. We demonstrate the applicability of CT measurements and quantitative defect analysis for the purposes of SLM process monitoring and refinement.

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“…The studied geometries range from BCC (body-centered cubic) and FCC (face-centered cubic), with their variants, to more complex cells such as gyroid and diamond [21,22]. Many papers report the results of FE models and mechanical tests, especially compression tests, on samples with lattice structures, through the study of the fracture mechanics [23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…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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Microstructure and mechanical properties of aluminium alloy cellular lattice structures manufactured by direct metal laser sintering

Cited by 258 publications

References 31 publications

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

The Alumina Film Nanomorphology Formed to Improve the Corrosion Resistance of Al-2.0 wt% Fe Alloy as Result of the Laser Surface Melting Technique Applied

Quantification and characterisation of porosity in selectively laser melted Al–Si10–Mg using X-ray computed tomography

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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