About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
F-19: High-strain Rate and High-temperature Properties of Additively Manufactured Alloy 718 |
Author(s) |
Anjali Sankar, Manjaiah Mallaiah, Thomas McCarthy, Jubert Pasco, Matthew Harding, Clodualdo Aranas |
On-Site Speaker (Planned) |
Anjali Sankar |
Abstract Scope |
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 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 temperature range 25-400 °C and strain rate range of 1000-1500 s-1. The stress-strain curves were then modeled 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) model. 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%. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Modeling and Simulation |