Abstract
Nickel-based alloys are normally employed for aerospace components that experience high levels of stress at elevated temperatures. With the emergence of metal additive manufacturing (AM), it is essential to determine the high-temperature and high-strain rate properties of aerospace materials fabricated by means of laser-powder bed fusion (LPBF). Therefore, in this work, samples of Alloy 718 fabricated using LPBF are tested using a compressive Split-Hopkinson Pressure Bar (SHPB) fitted with a radiation infrared furnace at a temperature range of 25–400 °C and strain rate range of 1000–1500 s−1. The stress–strain curves were then modelled using phenomenological-, and artificial neural network-based constitutive material models, such as modified Johnson–Cook, Hensel-Spittel, modified Hensel-Spittel, and back-propagating artificial neural network (ANN) models. Although the ANN model provided the most accurate simulation, other material models such as Hensel-Spittel and modified Hensel-Spittel models provided Average Absolute Relative Errors of less than 15%.
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Acknowledgements
The authors acknowledge with gratitude funding received from the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Foundation for Innovation (CFI), New Brunswick Innovation Foundation (NBIF), Mitacs, ECO Canada, and the Atlantic Canada Opportunities Agency (ACOA). The authors also acknowledge the DST-SERB for providing SIRE fellowship with Award No. SIR/2022/001478. The support provided by the University of New Brunswick to host the SIRE fellowship is gratefully acknowledged.
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Sankar, A., Mallaiah, M., McCarthy, T., Pasco, J., Harding, M., Aranas, C. (2024). High-Strain Rate and High-Temperature Properties of Additively Manufactured Nickel-Based Alloy 718. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_21
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DOI: https://doi.org/10.1007/978-3-031-50349-8_21
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