Effect of specimen geometry and orientation on tensile properties of Ti-6Al-4V manufactured by electron beam powder bed fusion

Published

December 17, 2021

Author(s)

Gitanjali Shanbhag, Evan Wheat, Shawn P. Moylan, Mihaela Vlasea

Abstract

Tensile testing is often proposed as the preferred methodology to qualify builds and materials produced through additive manufacturing. However, there is currently no single standard specimen geometry that is widely adopted to achieve this. While there is already work demonstrating the difference in measured properties between tensile specimens produced in different build orientations, this does not extend to different specimen geometries. In addition, the body of knowledge in this domain is typically made up of studies that utilize custom combinations of specimen geometries, part finishing and post-processing, making it challenging to compare results. To study the impact of geometry of tensile specimens on tensile testing results, a selection of standard specimen typesprovided in ASTM E8/E8M was prepared in Ti-6Al-4V using an electron beam additive manufacturing machine. These specimens were characterized to observe any porosity defects, dimensional deviations, and surface topography that could impact performance. This study presents the results of the tensile testing and evaluations of any systematic correlations of mechanical performance with respect to the various specimen geometries and specimen properties.

Citation

Journal of Additive Manufacturing

Volume

48

Pub Type

Journals

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DOI Link

Keywords

Additive manufacturing, X-ray computed tomography, electron beam powder bed fusion, titanium, tensile properties, geometry, qualification

Citation

Shanbhag, G. , Wheat, E. , Moylan, S. and Vlasea, M. (2021), Effect of specimen geometry and orientation on tensile properties of Ti-6Al-4V manufactured by electron beam powder bed fusion, Journal of Additive Manufacturing, [online], https://doi.org/10.1016/j.addma.2021.102366 (Accessed October 11, 2024)