Rapid fabrication of metallic mechanism joints by selective laser melting

Yang, Yongqiang; Su, Xing; Wang, D; Chen, Y

doi:10.1177/0954405411407997

Cited by 32 publications

(32 citation statements)

References 16 publications

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“…This design can easily be extended into an array of unit cells in all three space orientations due to its regular structure. In addition, the struts are built under a polar angle of 55°, which ensures reliable manufacturing properties without additional supports ( Vandenbroucke and Kruth, 2007;Mullen et al, 2009;Thomas, 2009;Mullen et al, 2010;Rehme, 2010;Tsopanos et al, 2010;Yang et al, 2011). For statistical purposes and to analyse manufacturing repeatability, the test specimens consist of 125 unit cells (5 x 5 x 5 mm³).…”

Section: Lattice Structure Designmentioning

confidence: 99%

Optimisation of process parameters for lattice structures

Abele

Stoffregen

Klimkeit

et al. 2015

Rapid Prototyping Journal

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If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -Selective laser melting (SLM) is a commonly known and established additive manufacturing technique and is a key technology in generating intricately shaped lattice structures. However, standard process parameters used in this technology have building time and accuracy disadvantages for structures with a low area-to-perimeter ratio, such as thin struts. Within this study, a set of process parameters tailored for lattice structures is developed and tested against standard process parameters. Design/methodology/approach -In this research work, body-centred cubic (BCC) structure specimens are manufactured using adapted process parameters. Central to the adapted process parameters is the positioning of the laser beam, the scan strategy, and the linear energy density. The specimens are analysed with X-ray micro-computed tomography (micro-CT) for dimensional accuracy. The final assessment is a comparison between specimens manufactured using adapted process parameters and those using standard process parameters. Findings -Standard parameters for lattice structures lead to a significant shift from the nominal geometry. An extensive manufacturing and computation time due to several exposure patterns (e.g. pre-contours, post-contours) was observed. The tailored process parameters developed had good dimensional accuracy, reproducible results, as well as improved manufacturing performance.Research limitations/implications -The results are based on a distinctive geometry of the lattice structure and a specific material. Future research should be extended to other geometries and materials. Practical implications -Optimisation of process parameters for the part geometry is a critical factor in improving dimensional accuracy and performance of SLM processes. Originality/value -This study demonstrates how application-tailored process parameters can lead to superior performance and improved dimensional accuracy. The results can be transferred to other lattice structure designs and materials.

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Section: Lattice Structure Designmentioning

confidence: 99%

Optimisation of process parameters for lattice structures

Abele

Stoffregen

Klimkeit

et al. 2015

Rapid Prototyping Journal

View full text Add to dashboard Cite

show abstract

“…Yadroitsev et al (2009) have obtained some finestructured 3D porous filter components with customized pattern of micron-sized channels using a SLM machine PM100. Yang et al (2011b) have studied direct fabrication of non-assembly mechanism by SLM process and obtained some joints. It is expected that a better understanding of processing principle promotes an improved fabrication quality as well as an expanded application.…”

Section: Introductionmentioning

confidence: 99%

Research on track overlapping during Selective Laser Melting of powders

Yang

2012

Journal of Materials Processing Technology

109

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“…These layer-wise manufacturing methods support a market niche for components with shorter production times and intricate geometry details [1]. Although applications were historically confined to the production of prototypes, modern methods extend to the manufacturing of tooling inserts, biomedical implants, mass-customised consumer products, aerospace components, and artwork [1][2][3][4][5][6][7]. Among the AM methods, selective laser melting (SLM) dominates applications in the industrial and academic sectors [3].…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment of Ti-6al-4v Produced by Lasercusing

Becker¹,

Rooyen²,

Dimitrov³

2015

sajie

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LaserCUSING® is a selective laser melting (SLM) process that is capable of manufacturing parts by melting powder with heat input from a laser beam. LaserCUSING demonstrates potential for producing the intricate geometries specifically required for biomedical implants and aerospace applications. One main limitation to this form of rapid prototyping is the lack of published studies on the material performance of the resulting material. Studies of the material's performance are often complicated by dependence on several factors, including starting powder properties, laser parameters, and post-processing heat treatments. This study aims to investigate the mechanical properties of LaserCUSINGproduced Ti-6Al-4V and its performance relative to the conventional wrought counterpart. A combination of conventional and LaserCUSING-tailored heat treatments is performed. The resulting microstructures are studied and linked to the properties obtained from hardness tests. The findings highlight that LaserCused Ti-6Al-4V is competitive with traditional materials, provided that optimal parameters are chosen and parts are subject to tailored post-processing. In the as-built condition, LaserCused Ti-6Al-4V displays superior strength and hardness as a result of a martensitic microstructure, and a poorer performance in ductility. However, the material performance can be improved using tailored heat treatments. Careful consideration must be given to suitable post-processing before application in critical components in the aerospace or biomedical industry can occur. OPSOMMINGLaserCUSING® is 'n selektiewe lasersmeltproses met die vermoë om onderdele te vervaardig deur die smelt van poeier met hitte inset van 'n laserstraal. LaserCUSING toon die potensiaal om ingewikkelde geometrieë benodig vir biomediese implantate en lugvaart toepassings, te produseer. Een van die hoof beperkings tot hierdie vorm van blits prototipering is die tekort aan gepubliseerde studies oor die materiaaleienskappe van die gevolglike materiaal. Studies van die materiaaleienskappe is dikwels verder gekompliseer as gevolg van die invloed van verskeie faktore, soos die aanvanklike poeier eienskappe, die laser parameters en hittebehandelings na die lasersmeltproses. Hierdie studie beoog om die meganiese eienskappe van Ti-6Al-4V wat met LaserCUSING geproduseer is, en die vertoning daarvan relatief tot 'n konvensionele bewerkte eweknie, te ondersoek. 'n Kombinasie van konvensionele en aangepaste hittebehandelings is toegepas. Die resulterende mikrostrukture is ondersoek en verwantskappe tot die resultate van hardheidstoetse is gevind. Die resultate toon dat die Ti-6Al-4V met tradisionele materiale kan kompeteer mits optimale parameters vooraf gekies word en dat onderdele aangepaste hittebehandelings ondergaan. Die Ti-6Al-4V toon beter sterkte en hardheid, maar het swakker smeebaarheid. Noukeurige oorweging vir verwerking na die lasersmelt is nodig voor die toepassing daarvan op kritiese komponente. #This article is an extension of a paper presented at

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Rapid fabrication of metallic mechanism joints by selective laser melting

Cited by 32 publications

References 16 publications

Optimisation of process parameters for lattice structures

Optimisation of process parameters for lattice structures

Research on track overlapping during Selective Laser Melting of powders

Heat Treatment of Ti-6al-4v Produced by Lasercusing

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