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Open AccessArticle

The Effect of Post-Processing on the Mechanical Behavior of Ti6Al4V Manufactured by Electron Beam Powder Bed Fusion for General Aviation Primary Structural Applications

CIRA (Italian Aerospace Research Center), 81043 Capua CE, Italy
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Aerospace 2020, 7(6), 75; https://doi.org/10.3390/aerospace7060075
Received: 16 March 2020 / Revised: 29 May 2020 / Accepted: 3 June 2020 / Published: 5 June 2020
(This article belongs to the Special Issue Additive Manufacturing for Aerospace and Defence)
In this work a mechanical characterization of Ti6Al4V processed by electron beam powder bed fusion additive manufacturing was carried out to investigate the viability of this technology for the manufacturing of flyable parts for general aviation aircraft. Tests were performed on different manufacturing conditions in order to investigate the effect of post processing as machining on the mechanical behavior. The study provides useful information to airframe designers and manufacturing specialists that work with this technology. The investigation confirms the low process variability and provides data to be used in the design loop of general aviation primary structural elements. The test results show a high level of repeatability indicating that the process is well controlled and reliable enough to match the airworthiness requirements. In addition, the so-called “as-built specimens”, i.e., specimens produced by the electron beam melting machine without any major post-processing, have lower mechanical performances than specimens subjected to a machining phase after the electron beam melting process. Specific primary structural elements will be designed and flight cleared, resulting from the findings presented herein. View Full-Text
Keywords: additive manufacturing; EBM; mechanical characterization; general aviation; airworthiness additive manufacturing; EBM; mechanical characterization; general aviation; airworthiness
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Pirozzi, C.; Franchitti, S.; Borrelli, R.; Chiariello, A.; Di Palma, L. The Effect of Post-Processing on the Mechanical Behavior of Ti6Al4V Manufactured by Electron Beam Powder Bed Fusion for General Aviation Primary Structural Applications. Aerospace 2020, 7, 75.

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