About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Computational Thermodynamics and Kinetics
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Presentation Title |
Phase-field Modeling of Microstructure Evolution during Post-printing Heat Treatment of Additively Manufactured Ti6Al4V Alloy |
Author(s) |
Adrian Boccardo, Mingming Tong, Seán Leen, Zhiyi Zou, Marco Simonelli, Javier Segurado, Damien Tourret |
On-Site Speaker (Planned) |
Adrian Boccardo |
Abstract Scope |
Ti-based alloy parts obtained by additive manufacturing (AM) can be employed in both aeronautical and medical industries. AM of Ti6Al4V via Laser Powder Bed Fusion (LPBF) technique typically leads to fine martensitic microstructures. Their mechanical properties can to a great extent be modified via heat treatments. During these, the metastable á’ martensite decomposes into a mixture of stable á+â phases and coarsens. In order to evaluate the influence of annealing parameters (e.g. temperature, dwelling time, cooling rate) on microstructural features (e.g. phase fractions, morphologies and crystal orientations), we developed a phase-field model and carefully calibrated its parameters against experimental data. The numerical solver is based on Fourier spectral method and parallelized in graphical processing units. Results of the model and direct experimental comparisons highlight the effects of the kinetics formation and coarsening of an α+β microstructure as a formation of annealing temperatures, dwelling time and cooling rates. |
Proceedings Inclusion? |
Planned: |