Multiscale Modeling of Microstructural Evolution in Fused-Coating Additive Manufacturing
| Autor: | Guangxi Zhao, J. D. Ni, Ruwei Geng, Jun Du, Zhengying Wei |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Equiaxed crystals Materials science Mechanical Engineering 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Multiscale modeling Temperature gradient Coating Mechanics of Materials Phase (matter) 0103 physical sciences Heat transfer engineering General Materials Science Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Materials Engineering and Performance. 28:6544-6553 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-019-04375-7 |
| Popis: | A quantitative phase field model with adaptive-computational-domain-expansion (ACDE) method was developed to simulate the microstructural evolution in fused-coating additive manufacturing process. A heat transfer and fluid flow model was established to investigate the solidification behavior of the molten pool in a single deposited layer. The solidification parameters such as temperature gradient and solidification rate were calculated from the macroscopic model and then fed into the phase field model to get the microstructure at different positions within a single deposited layer. Columnar dendrites were formed at the bottom of the deposited layer, and equiaxed dendrites appeared in the upper part of the layer. The ACDE method is used to improve the simulation efficiency. The metallographic experiments and energy-dispersive spectrometer analysis for composition were conducted on the fused-coating specimen, and the results were in good accordance with the simulations. |
| Databáze: | OpenAIRE |
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