Abstract
Predicting the temperature field during the direct energy deposition (DED) process is vital for the microstructure control and property tuning of fabricated metals. The widely used data-driven machine learning method for accurate temperature prediction, however, is impractical and computation-intensive due to its sole reliance on large datasets; also being a black-box model in nature, it lacks interpretability. We propose a physics informed neural network (PINN) model, which adopts a novel physics-data hybrid method by embedding the heat transfer law into the loss function of the neural network, to model the temperature field in both single-layer and multi-layer DED. The results show that the PINN-based models with additional extrapolation ability can accurately predict temperatures with a mean relative error of 4.83%, and achieve identical prediction accuracy with only 20% of the labeled data required for training the data-driven deep neural network. The proposed model is more explainable in terms of the physics of the DED process and is also applicable for the DED of different metals.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Funding
This work was supported by the National Key R&D Program of China [2018YFC0310400], and Guangzhou Risong Intelligent Technology Holding Co., Ltd. China, [Grant numbers: 2020-L021].
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Jibing Xie: investigation, methodology, coding, analyzing, writing—original draft. Ze Chai: writing—review and editing. Xukai Ren: writing—review and editing. Luming Xu: experimentation. Sheng Liu: data analysis. Xiaoqi Chen: conceptualization, funding acquisition, writing—review, and revision.
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Xie, J., Chai, Z., Xu, L. et al. 3D temperature field prediction in direct energy deposition of metals using physics informed neural network. Int J Adv Manuf Technol 119, 3449–3468 (2022). https://doi.org/10.1007/s00170-021-08542-w
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DOI: https://doi.org/10.1007/s00170-021-08542-w