Electron Beam Powder Bed Fusion Additive Manufacturing of Ti6Al4V Alloy Lattice Structures: Orientation-Dependent Compressive Strength and Fracture Behavior

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aut.relation.endpage13
aut.relation.journalInternational Journal of Advanced Manufacturing Technology
aut.relation.startpage1
dc.contributor.authorHuang, Yawen
dc.contributor.authorChen, ZW
dc.contributor.authorWan, ARO
dc.contributor.authorSchmidt, K
dc.contributor.authorSefont, P
dc.contributor.authorSingamneni, S
dc.date.accessioned2024-04-23T03:14:11Z
dc.date.available2024-04-23T03:14:11Z
dc.date.issued2024-04-09
dc.description.abstractHigh porosity level lattice structures made using electron beam powder bed fusion additive manufacturing (EBPBF) need to be sufficiently strong and the understanding of the mechanical anisotropy of the structures is important for the design of orthopedic implants. In this work, the combined effects of loading direction (LD), cell orientation, and strut irregularity associated with EBPBF of Ti6Al4V alloy lattices on the mechanical behavior of the lattices under compressive loading have been studied. Three groups of simple cubic unit cell lattices were EBPBF made, compressively tested, and examined. The three groups were [001]//LD lattices, [011]//LD lattices, and [111]//LD lattices. Simulation has also been conducted. Yield strength (σy-L) values of all lattices determined experimentally have been found to be comparable to the values predicted by simulation; thus, EBPBF surface defects do not affect σy-L. σy-L of [001]//LD lattices is 1.8–2.0 times higher than those of [011]//LD and [111]//LD lattices. The reason for this is shown to be due to the high stress concentrations in non-[001]//LD samples, causing yielding at low loading levels. Furthermore, plastic strain (εp) at ultimate compression strength of [001]//LD samples has been determined to be 4–6 times higher than the values of non-[001]//LD samples. Examining the tested samples has shown cracks more readily propagating from EBPBF micro-notches in non-[001]//LD samples, resulting in low εp.
dc.identifier.citationInternational Journal of Advanced Manufacturing Technology, ISSN: 0178-0026 (Print); 0178-0026 (Online), Springer, 1-13. doi: 10.1007/s00170-024-13539-2
dc.identifier.doi10.1007/s00170-024-13539-2
dc.identifier.issn0178-0026
dc.identifier.issn0178-0026
dc.identifier.urihttp://hdl.handle.net/10292/17452
dc.languageen
dc.publisherSpringer
dc.relation.urihttps://link.springer.com/article/10.1007/s00170-024-13539-2
dc.rightsOpen Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
dc.rights.accessrightsOpenAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject4014 Manufacturing Engineering
dc.subject40 Engineering
dc.subject01 Mathematical Sciences
dc.subject08 Information and Computing Sciences
dc.subject09 Engineering
dc.subjectIndustrial Engineering & Automation
dc.subject40 Engineering
dc.subject46 Information and computing sciences
dc.subject49 Mathematical sciences
dc.titleElectron Beam Powder Bed Fusion Additive Manufacturing of Ti6Al4V Alloy Lattice Structures: Orientation-Dependent Compressive Strength and Fracture Behavior
dc.typeJournal Article
pubs.elements-id545000
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