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Original Articles

3D Metal printed heat sinks with longitudinally varying lattice structure sizes using direct metal laser sintering

ORCID Icon, , , , &
Pages 301-310 | Received 24 Mar 2018, Accepted 18 May 2018, Published online: 27 May 2018
 

ABSTRACT

This research relates to the design, modelling and fabrication of 3D metal printed heat sinks. The heat sinks presented in the research are the commonly used longitudinal fin solid heat sink (LFSHS) and three LFSHS lattice structure designs, differing only in their lattice sizes, fabricated using the Direct Metal Laser Sintering (DMLS) technique in Maraging Steel (MS1), on an EOSINT M280 system. In order to increase the heat sink surface area, the heat sinks are manufactured with mesh lattices along the length of the fins, while keeping the overall heat sink volume constant. The research is focused on pushing the limitations of the DMLS technique for the development of repeating unit, lattice structures heat sinks, and to examine the effect of incrementally varying the lattice sizes with regards to the resultant surface area of the heat sink and the thermal performance of the system. The results obtained under natural convection show that the thermal performance of the LFSHS outperformed all lattice structure heat sinks. This is due to the fact that, the pressure drop across the lattice heat sinks were so high, due to lattice meshes that it negated the positive effect of the greater surface area.

Acknowledgements

The authors would like to thank all the reviewers and their valuable comments that have greatly improved this manuscript.

Disclosure statement

No potential conflict of interest was reported by the authors.

Notes on contributors

Deepak Shamvedi is currently pursuing his Ph.D. degree in Engineering Technology at the Waterford Institute of Technology (WIT), Ireland. His doctoral research is concerned with designing 3D metal printed microwave components. More recently his research interests are directed towards RF/Microwave applications of 3D metal printed components.

Dr. Oliver J. McCarthy was a Senior Development Engineer in SEAM research centre, WIT. His primary role within this area was the development of novel 3D printed components for the bio-medical and precision engineering industries.

Cyril Danilenkoff is currently working as an R&D Engineer in the SEAM research centre, WIT. He has an expertise in the area of 3D metal printing.

Eoghan O’Donoghue is a Technology Leader – Failure Analysis and Finite Element Analysis, in the SEAM research centre, WIT. He works on a wide range of industrial projects across a variety of sectors including biomedical, precision engineering, electronics and pharmaceuticals.

Dr. Paul O’Leary is the Head of Quality Promotion in WIT. Prior to that, he worked at the Max Planck Institute for Solar System Research, in the Consiglio Nazionale delle Ricerche, Italy and the Photonics Research Centre, Dublin.

Dr. Ramesh Raghavendra in his present role serve as a SEAM Centre Director, He has managed in executing over 1000 direct funded industry funded projects and secured over 8.5 million euros in funding for SEAM. He also holds patent in microwave processing of ceramic materials and in cofiring of ceramics. He has authored/co-authored more than 60 refereed journal publications.

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