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Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

Simonelli, Marco; Tse, Y.Y.; Tuck, Christopher


Y.Y. Tse


Recent research on the additive manufacturing (AM) of Ti alloys has shown that the mechanical properties of the parts are affected by the characteristic microstructure that originates from the AM process. To understand the effect of the microstructure on the tensile properties, selective laser melted (SLM) Ti–6Al–4V samples built in three different orientations were tensile tested. The investigated samples were near fully dense, in two distinct conditions, as-built and stress relieved. It was found that the build orientation affects the tensile properties, and in particular the ductility of the samples. The mechanical anisotropy of the parts was discussed in relation to the crystallographic texture, phase composition and the predominant fracture mechanisms. Fractography and electron backscatter diffraction (EBSD) results indicate that the predominant fracture mechanism is intergranular fracture present along the grain boundaries and thus provide and explain the typical fracture surface features observed in fracture AM Ti–6Al–4V.


Simonelli, M., Tse, Y., & Tuck, C. (2014). Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V. Materials Science and Engineering: A, 616, doi:10.1016/j.msea.2014.07.086

Journal Article Type Article
Acceptance Date Jul 27, 2014
Online Publication Date Aug 2, 2014
Publication Date Oct 20, 2014
Deposit Date Aug 8, 2017
Journal Materials Science and Engineering: A
Print ISSN 0921-5093
Electronic ISSN 0921-5093
Publisher Elsevier
Peer Reviewed Not Peer Reviewed
Volume 616
Keywords Titanium alloys, Fracture, EBSD, Mechanical characterization, Rapid solidification
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