Porosity in AC4C and AC8C Castings and Its Computer Simulation
A direct simulation method has been developed for the prediction of porosity. The model considers both hydrogen redistribution in melt and solidification contraction. Simulated results were compared with experiments for castings of AC4C (sand mold) and AC8C (metallic mold) alloys. Both the simulatio...
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| Published in | Imono Vol. 64; no. 1; pp. 19 - 25 |
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| Main Authors | , |
| Format | Journal Article |
| Language | Japanese |
| Published |
Tokyo
Japan Foundry Engineering Society
25.01.1992
Nippon Imono Kyokai |
| Online Access | Get full text |
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| Summary: | A direct simulation method has been developed for the prediction of porosity. The model considers both hydrogen redistribution in melt and solidification contraction. Simulated results were compared with experiments for castings of AC4C (sand mold) and AC8C (metallic mold) alloys. Both the simulation and experimental results showed that regions solidified slowly have a higher amount of porosity. It was found that it is difficult to predict porosity by the temperature gradient method or G⋅tf1/2 method, because these methods do not consider the effect of hydrogen. Further, it was also found that calculated and experimental secondary arm spacings show a rather good agreement by taking the time from liquidus temperature to eutectic temperature as the local solidification time. |
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| ISSN: | 0021-4396 2186-0335 |
| DOI: | 10.11279/imono.64.1_19 |