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Title: The formation of [alpha] + [beta] microstructure in as-fabricated selective laser melting of Ti–6Al–4V
Authors: Simonelli, Marco
Tse, Yau Yau
Tuck, Christopher
Keywords: Microstructure
Annealing
Hardness
Issue Date: 2014
Publisher: Cambridge University Press (© Materials Research Society)
Citation: SIMONELLI, M., TSE, Y. and TUCK, C., 2014. The formation of [alpha] + [beta] microstructure in as-fabricated selective laser melting of Ti–6Al–4V. Journal of Materials Research, 29 (17), pp.2028-2035.
Abstract: Ti–6Al–4V parts made by the additive manufacturing (AM) technique selective laser melting (SLM) generally show poor ductility due to their fine martensitic microstructure. This study was designed to assess whether a more suitable microstructure can be obtained when long laser/material interaction times are used. As-fabricated components with an [alpha] + [beta] microstructure were produced and characterized with various microscopy techniques. The microstructural evolution was discussed in relation to the build platform temperature, the cyclic reheating, and the thermal stresses that developed during the process. The hardness of the samples was also evaluated and discussed. The hardness varied in relation to the different microstructure morphologies observed in the samples and different partitioning of the alloying elements. This study indicates a methodology through SLM to obtain Ti–6Al–4V with an as-deposited [alpha] + [beta] microstructure which is more desirable than that the typical fully martensitic microstructure typically obtained after SLM.
Version: Accepted for publication
DOI: 10.1557/jmr.2014.166
URI: https://dspace.lboro.ac.uk/2134/22162
Publisher Link: http://dx.doi.org/10.1557/jmr.2014.166
ISSN: 0884-2914
Appears in Collections:Published Articles (Materials)

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Revised manuscript_JMR_final.pdfAccepted version200.28 kBAdobe PDFView/Open
revised Figures and Tables.pdfAccepted version1.02 MBAdobe PDFView/Open

 

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