About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Purveyors of Processing Science and ICME: A SMD Symposium to Honor the Many Contributions of Taylan Altan, Wei Tsu Wu, Soo-Ik Oh, and Lee Semiatin
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Presentation Title |
Modeling of the Solidification Structure Evolution of Ti-6Al-4V Processed via Electron Beam Powder Bed Fusion |
Author(s) |
Laurentiu Nastac, Edwin Schwalbach, Kevin Chaput, Todd Butler |
On-Site Speaker (Planned) |
Laurentiu Nastac |
Abstract Scope |
A fast-acting discrete source additive manufacturing process model was coupled with a stochastic solidification structure model to predict grain structure evolution of Ti-6Al-4V alloy during Electron Beam Powder Bed Fusion (EB-PBF). The capabilities of the developed model include studying the effects of process parameters (power input, speed, beam shape) and part geometry on solidification conditions and their impact on the resulting solidification structure evolution. Grain size, morphology, and crystallographic orientation can be assessed, and the model can assist in achieving better control of the solidification microstructures and to establish trends in the solidification behavior in AM components. Validation was accomplished based on EB-PBF experiments using an Arcam A2 previously performed at Oak Ridge National Lab and subsequently analyzed at AFRL. It is expected that the approach can be extended to predict solidification structure of superalloys as well as laser PBF processes. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |