EFFECTS OF INJECTION SPEED ON MECHANICAL PROPERTIES IN HIGH-PRESSURE DIE CASTING OF MG-RE ALLOY
In this study, in order to clarify the unknown physical properties of the Mg-Al-Th-RE alloy, the relationship between the injection conditions and the internal porosities and the mechanical properties exerted by the solidification microstructure were investigated. The obtained cast samples were inve...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
mmscience
2021
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/36490/1/injection1.pdf http://ir.unimas.my/id/eprint/36490/ https://www.mmscience.eu/search?utf8=%E2%9C%93&q=EFFECTS+OF+INJECTION+SPEED+ON+MECHANICAL+PROPERTIES+IN+HIGH-PRESSURE+DIE+CASTING+OF+MG-RE+ALLOY https://doi.org./10.17973/MMSJ.2021_10_2021085 |
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| Summary: | In this study, in order to clarify the unknown physical properties of the Mg-Al-Th-RE alloy, the relationship between the injection conditions and the internal porosities and the mechanical properties exerted by the solidification microstructure were investigated. The obtained cast samples were investigated using X-ray CT internal measurements, tensile tests, Vickers hardness tests and solidification microstructure observations. The flow simulation and the X-ray CT analysis results showed that the porosity volume increased as the injection speed increases. The higher injection speed also affected the metal microstructure to become denser, which leads to a higher material strength and hardness. The eutectic phases quickly formed because of the shorter filled and cooled time. Therefore, the growth of the primary phase α-Mg was suppressed. On the other hand, it was considered that the material strength and hardness were greatly reduced by the coarse primary phase. |
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