Influence of post-processing on additively manufactured lattice structures

Majeed, Mobin, Khan, Hamaid Mahmood, Wheatley, Greg, and Situ, Rong (2022) Influence of post-processing on additively manufactured lattice structures. Journal Of The Brazilian Society Of Mechanical Sciences And Engineering, 44. 389.

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The rapid evolution in additive manufacturing (AM) technology advocates a periodic assessment of the recent progress in the process and product developments. One such area is lattice structure (LS) fabrication with controlled porosity, especially microscale triply periodic minimal surfaces. These nature-inspired and mechanically robust complex cellular structures are making significant progress in aerospace, automotive, and biomedical applications. However, limitations in the AM process, such as process-induced defects, microstructural heterogeneities, and post-processing challenges, may result in an inaccurate assessment of mechanical properties. This review paper presents a comprehensive overview of challenges in the fabrication of AM cellular structures, LS classification, simulation outline, and the effect of post-processing on their overall mechanical and microstructural development. It further provides a physical assessment and the underlying science of failure criteria and deformation mechanism of AM lattice structures. This review includes substantive discussions on LS topology, relative density, AM defects, and material type, critically analyzing the printability of various engineering alloys based on experimental and numerical studies. Finally, the knowledge gaps in the scientific understanding and the future research needs for the expansion of AM lattice materials are provided.

Item ID: 75828
Item Type: Article (Research - C1)
ISSN: 1806-3691
Keywords: Additive manufacturing, Lattice structure, Deformation mechanism, Post-processing, Mechanical strength, Failure criteria, Triply periodic lattice structure
Copyright Information: © The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering 2022.
Date Deposited: 24 Aug 2022 07:56
FoR Codes: 40 ENGINEERING > 4014 Manufacturing engineering > 401401 Additive manufacturing @ 100%
SEO Codes: 24 MANUFACTURING > 2499 Other manufacturing > 249999 Other manufacturing not elsewhere classified @ 100%
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