University of Twente Student Theses
Effects of Er and Eu addition on the fluidity of an A356 alloy in an improved permanent fluidity test mold
Veenhuis, Jan (2024) Effects of Er and Eu addition on the fluidity of an A356 alloy in an improved permanent fluidity test mold.
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| Abstract: | This study focuses on investigating the effects of the addition of Er and Eu on the fluidity of a common foundry alloy A356. Two improved permanent fluidity test molds have been designed and fluidity experiments have been conducted on four compositions; the base alloy (A356), 0.1wt% Er, 0.2wt% Eu and 0.1wt% Er + 0.2wt% Eu addition. The results show no statistically significant change in fluidity after the addition of Er and/or Eu to the A356 base alloy. From the results of the RPT samples it was found that the melt cleaning treatment was not successful. Moreover, Er was unable to grain refine the microstructure, which was attributed to the nucleation of Er on the oxide bifilms which settled to the bottom of the crucible which also cleaned the melt. Moreover, it was found that the eutectic Si of the base alloy was already modified before any addition. However, the eutectic could be modified even further when Eu was added to the melt, the fluidity decreased, but the effect remained minimal. A Gage R&R study was conducted on the mold and test procedures and it was found that they are capable of measuring fluidity in a repeatable and reproducible way. |
| Item Type: | Essay (Master) |
| Clients: | Foseco Vesuvius, Enschede, Netherlands |
| Faculty: | ET: Engineering Technology |
| Subject: | 50 technical science in general |
| Programme: | Mechanical Engineering MSc (60439) |
| Link to this item: | https://purl.utwente.nl/essays/103837 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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