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The formation of α + β microstructure in as-fabricated selective laser melting of Ti–6Al–4V

Simonelli, Marlo; Tse, Yau Yau; Tuck, C.


Yau Yau Tse


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 ? + ? 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 ? + ? microstructure which is more desirable than that the typical fully martensitic microstructure typically obtained after SLM.


Simonelli, M., Tse, Y. Y., & Tuck, C. (2014). The formation of α + β microstructure in as-fabricated selective laser melting of Ti–6Al–4V. Journal of Materials Research, 29(17), 2028-2035.

Journal Article Type Article
Acceptance Date Jun 20, 2014
Online Publication Date Jul 25, 2014
Publication Date 2014-09
Deposit Date Nov 29, 2018
Journal Journal of Materials Research
Print ISSN 0884-2914
Electronic ISSN 2044-5326
Publisher Cambridge University Press (CUP)
Peer Reviewed Peer Reviewed
Volume 29
Issue 17
Pages 2028-2035
Public URL
Publisher URL