Abstract
Additive manufacturing (AM) has proven itself to be an effective and versatile solution in replacing aircraft structures and components. However, the AM process still requires the necessary structural reliability as well as the technology to assess operational longevity. In this work, a fatigue performance and damage progression assessment framework is proposed to achieve a fundamental understanding of the fatigue damage mechanisms and its progression in as-built treated electron beam melted (EBM) Ti-6Al-4V at the macroscopic structural scale as well as at the microscopic constituent scale. The work presented utilizes digital image correlation (DIC), an optical strain measurement technique, as a method to detect crack initiation sites occurring on the material’s surface and propagating throughout the specimen. A comprehensive testing framework and experimental procedure is developed to generate fatigue data for AM material Ti-6Al-4V as-built specimens. Characterization and simulation of the fatigue progress due to AM process defects (voids, surface roughness, etc.) are also performed using damaging energy progress and damage evaluation.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Tofail, S.A., Koumoulos, E.P., Bandyopadhyay, A., Bose, L., O’Donoghue, S., Charitidis, C.: Additive manufacturing: scientific and technological challenges, market uptake and opportunities. Mater. Today 21(1), 22–37 (2018)
Findlay, S., Harrison, N.: Why aircraft fail. Mater. Today 5(11), 18–25 (2002)
Hrabe, N., Gnäupel-Herold, T., Quinn, T.: Fatigue properties of a titanium alloy (ti-6al-4v) fabricated via electron beam melting (ebm): effects of internal defects and residual stress. Int. J. Fatigue 94, 202–210 (2017)
Tammas-Williams, S., Withers, P., Todd, I., Prangnell, P.: The influence of porosity on fatigue crack initiation in additively manufactured titanium components. Sci. Rep. 7(1), 7308 (2017)
Biswal, R., Syed, A.K., Zhang, X.: Assessment of the effect of isolated porosity defects on the fatigue performance of additive manufactured titanium alloy. Addit. Manuf. 23, 433–442 (2018)
Chern, A.H., Nandwana, P., Yuan, T., Kirka, M.M., Dehoff, R.R., Liaw, P.K., Duty, C.E.: A review on the fatigue behavior of ti-6al-4v fabricated by electron beam melting additive manufacturing. Int. J. Fatigue 119, 173–184 (2019)
Acknowledgements
The authors would like to thank the Turbine Engine Fatigue Facility of the Air Force Research Laboratory at Wright-Patterson Air Force Base for equipment use, assistance, and technical support of this research effort. The authors would also like to acknowledge and thank the Center for Design and Manufacturing Excellence at the Ohio State University for supplying and creating the material needed with their equipment.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2021 The Society for Experimental Mechanics, Inc.
About this paper
Cite this paper
Warner, J., Celli, D., Rindler, J., Shen, M.H., Scott-Emuakpor, O., George, T. (2021). Fatigue Assessment of Porosity in Electron Beam Melted Ti-6Al-4V. In: Xia, S., Beese, A., Berke, R.B. (eds) Fracture, Fatigue, Failure and Damage Evolution , Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-60959-7_5
Download citation
DOI: https://doi.org/10.1007/978-3-030-60959-7_5
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-60958-0
Online ISBN: 978-3-030-60959-7
eBook Packages: EngineeringEngineering (R0)