Mass transport and solidification phenomenon in dissimilar metals arc welding
| Autor: | Fatemeh Hejripour, Daniel T. Valentine, Daryush K. Aidun, Brian T. Helenbrook |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Computer simulation Mass distribution Mechanical Engineering 02 engineering and technology Welding Mechanics Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas law.invention law 0103 physical sciences Thermal Fluid dynamics Weld pool Arc welding 0210 nano-technology |
| Zdroj: | International Journal of Heat and Mass Transfer. 144:118703 |
| ISSN: | 0017-9310 |
| DOI: | 10.1016/j.ijheatmasstransfer.2019.118703 |
| Popis: | A 3D transient numerical simulation is developed to study the arc welding of dissimilar metals for three sets of processing parameters. The model is used to investigate the fluid flow impacts on mass transport during the process. The predicted mass distribution agrees well with experimental composition measurements obtained from electron dispersive spectroscopy (EDS) analysis. The temperature distribution and the top surface shapes also match well with the experimental data. The morphology of the weld metal has a crucial impact on the weldment’s mechanical properties, and the prediction of solidification structure is key to improving weld quality. To this end, thermal results are applied to analyze the solidification behavior of the weld pool. The solidification parameters are calculated at the weld pool interface and the results are compared with the observed morphology from the experiments. The experimental observations confirm the presence of asymmetric solidification as demonstrated by the proposed model. |
| Databáze: | OpenAIRE |
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