Abstract
Both solidification and phase transformation play key roles in determining the final mechanical properties of Ti–6Al–4V parts fabricated by directed energy deposition (DED) additive manufacturing (AM). A cross-sectional Monte Carlo model is proposed to simulate both solidification and solid-state phase transformations on the cross section of DED parts. Results indicate that the simulated prior β and α grains are both well correlated with experimental observations. An increase in the build height leads to an increase in the grain length during solidification, and α embryos are generated on the boundaries of the formed β grains. The phase transformation is completed between 950 and 800 °C during cooling. The numerical results of the phase transformation agree well with the experimental observations.
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The raw/processed data required to reproduce these findings cannot be shared at this time because of technical or time limitations.
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Not applicable (numerical simulations are calculated by commercial finite-element software and user subroutines).
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This article was funded by Natural Science Foundation of Liaoning Province (Grant No: 2019-KF-05-07, Zhao Zhang).
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ZZ: writing (original draft preparation), project administration, and reviewing and editing (final draft). PG: experimental and numerical work, data processing, and mapping. JYL: XRD experiment. DR: XRD experiment. TW: XRD and microstructure analyses.
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Zhang, Z., Ge, P., Li, J.Y. et al. Monte Carlo simulations of solidification and solid-state phase transformation during directed energy deposition additive manufacturing. Prog Addit Manuf 7, 671–682 (2022). https://doi.org/10.1007/s40964-021-00253-8
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DOI: https://doi.org/10.1007/s40964-021-00253-8