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

Simonelli, Marco and Tse, Y.Y. and Tuck, Christopher (2014) Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V. Materials Science and Engineering: A, 616 . pp. 1-11. ISSN 0921-5093

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Abstract

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.

Item Type: Article
Keywords: Titanium alloys, Fracture, EBSD, Mechanical characterization, Rapid solidification
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1016/j.msea.2014.07.086
Depositing User: Eprints, Support
Date Deposited: 08 Aug 2017 11:55
Last Modified: 08 Aug 2017 11:55
URI: http://eprints.nottingham.ac.uk/id/eprint/44751

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