The characterisation and formation of novel microstructural features in a Ti−Nb−Zr−Mo−Sn alloy manufactured by Laser Engineered Net Shaping (LENS)

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dc.contributor.authorZhu, HLen_AU
dc.contributor.authorWang, ZYen_AU
dc.contributor.authorMuránsky, Oen_AU
dc.contributor.authorDavis, Jen_AU
dc.contributor.authorYu, Sen_AU
dc.contributor.authorKent, Den_AU
dc.contributor.authorWang, Gen_AU
dc.contributor.authorDargusch, MSen_AU
dc.date.accessioned2023-04-20T06:57:22Zen_AU
dc.date.available2023-04-20T06:57:22Zen_AU
dc.date.issued2021-01en_AU
dc.date.statistics2023-01-23en_AU
dc.description.abstractNovel microstructural features were found in the Ti−Nb−Zr−Mo−Sn alloy manufactured by Laser Engineered Net Shaping (LENS). Examination of the microstructure showed that the fabricated sample exhibits a layered morphology with arced deposit boundaries. Novel distributions and morphologies of various phases including β, α, α'' and ω were detected in the LENS-manufactured part which substantially differ to conventionally processed alloy counterparts. The β grains and subgrains spread over multiple deposits and layers, aligned to the build direction, forming a complex network microstructure comprising large highly textured columnar grains aligned to β phase <001> orientations. The α precipitates have needle-like shapes and are widely distributed across a majority of the deposited layers, whereas the nanoscale ω particles were present in regions absent of α precipitation. Localised, massively transformed α'' phase with a very long and curved rod-like shape and substantial surface defects was identified. The formation of these novel microstructural features is investigated and discussed in the context of the characteristics of the LENS fabrication process. The microstructures are attributed to the complex thermal history in the unique deposit-by-deposit and layer-by-layer method employed during LENS additive manufacturing in conjunction with the complex precipitation behaviours exhibited by TiNb-based alloys. The characteristics and formation mechanisms of the LENS-manufactured Ti−Nb−Zr−Mo−Sn alloy microstructures revealed here provide a basis to optimize LENS and post-LENS heat treatment processes to optimize microstructures for improved performance. © 2020 Elsevier B.Ven_AU
dc.identifier.articlenumber101705en_AU
dc.identifier.citationZhu, H., Wang, Z., Muránsky, O., Davis, J., Yu, S., Kent, D., Wang, G. & Dargusch, M. S. (2021). The characterisation and formation of novel microstructural features in a Ti−Nb−Zr−Mo−Sn alloy manufactured by Laser Engineered Net Shaping (LENS). Additive Manufacturing, 37, 101705. doi:10.1016/j.addma.2020.101705en_AU
dc.identifier.issn2214-8604en_AU
dc.identifier.journaltitleAdditive Manufacturingen_AU
dc.identifier.urihttps://doi.org/10.1016/j.addma.2020.101705en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/14915en_AU
dc.identifier.volume37en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMicrostructureen_AU
dc.subjectAlloysen_AU
dc.subjectFabricationen_AU
dc.subjectLasersen_AU
dc.subjectAdditivesen_AU
dc.subjectPrecipitationen_AU
dc.titleThe characterisation and formation of novel microstructural features in a Ti−Nb−Zr−Mo−Sn alloy manufactured by Laser Engineered Net Shaping (LENS)en_AU
dc.typeJournal Articleen_AU
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