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| Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys | |
| Zhou, Bo; Wu, Di; Chen, Rongshi; Han, En-Hou | |
| 2019-11-23 | |
| Source Publication | ADVANCED ENGINEERING MATERIALS
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| ISSN | 1438-1656 |
| Abstract | The Niyama criterion and the dimensionless Niyama criterion are used to predict shrinkage microporosity in Mg-6Gd-3Y-0.5Zr magnesium plates processed by gravity casting and low-pressure sand casting. Instead of the Niyama evaluation condition recommended by commercial ProCAST software and precious studies, the most appropriate Niyama evaluation condition is suggested as fraction solid of 0.7 for the investigated alloys. With consideration of the actual distribution of shrinkage microporosity and the definition of unsound samples (shrinkage microporosity volume fraction is higher than 1% based on the tensile test), the corresponding threshold Niyama values are qualitatively determined as 0.44 and 0.3 degrees C-0.5 s(0.5) mm(-1) for gravity-cast and low-pressure sand-cast plates, respectively. It indicates that exerting pressure contributes to the decrease in the threshold Niyama value. In addition, exerting pressure can reduce the amount of shrinkage microporosity. For the dimensionless Niyama criterion, it is capable to quantitatively predict the shrinkage microporosity volume fraction in low microporosity-containing regions, but not in high microporosity-containing regions. |
| Keyword | dimensionless Niyama criterion low-pressure sand castings Mg-6Gd-3Y-0 5Zr magnesium alloys Niyama criterion shrinkage microporosities |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000491834600001 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/80690 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Zhou, Bo,Wu, Di,Chen, Rongshi,et al. Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys[J]. ADVANCED ENGINEERING MATERIALS,2019. |
| APA | Zhou, Bo,Wu, Di,Chen, Rongshi,&Han, En-Hou.(2019).Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys.ADVANCED ENGINEERING MATERIALS. |
| MLA | Zhou, Bo,et al."Prediction of Shrinkage Microporosity in Gravity-Cast and Low-Pressure Sand-Cast Mg-6Gd-3Y-0.5Zr Magnesium Alloys".ADVANCED ENGINEERING MATERIALS (2019). |
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