000K  utf8
1100  $c2018
1500  eng
2050  urn:nbn:de:gbv:8-diss-233148
3000  Ma, Xun
4000  Simulation of Plasma Electrolytic Oxidation (PEO) of AM50 Mg Alloys and its Experimental Validation$hChristian-Albrechts-Universität zu Kiel  [Ma, Xun]
4030  Kiel$nChristian-Albrechts-Universität zu Kiel
4209  The PEO process is a useful surface technology to improve wear performance and corrosion resistance on light metals such as Mg, Al and Ti and their alloys. It has been studied for several decades, but up to now, its mechanism is still not fully understood. In order to improve the understanding of PEO process and get better process design for industrial application, it is worth studying numerical approaches of the PEO process. This thesis provides a modeling and simulation approach to study the PEO process on Mg alloy AM50 under constant voltage mode. A numerical model has been built to describe the PEO process using Finite Element Method in COMSOL. Experiments are performed to provide data input for the modeling and simulation, and also to validate the correctness and usefulness of the modeling. From comparison, the simulation result of coating thickness is in good agreement with the experimental result. The application of the model was verified by studies investigating the influences of different voltage, a complex substrate geometry and the electrode distance on the formation of PEO coatings. The approach of the model can predict the coating thickness close to the experimental results and explain the effects of the main process parameters on the coating growth reasonably. Therefore, the methodology provided by the numerical model has been demonstrated to be a useful tool for predicting the coating thickness and explaining the effects of different parameters on Mg alloy under constant voltage mode.
4950  https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-233148$xR$3Volltext$534
4961  https://macau.uni-kiel.de/receive/diss_mods_00023314
5051  620
5550  experiment
5550  Mg alloy
5550  PEO
5550  simulation
5550  validation