Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy
Through studying the effects of the Al⁻5Ti-<i>x</i>(Mg⁻30%Ce) refiner on the microstructure of the Al⁻7Si alloy, we investigated the hardness, tensile, and impact properties of the Al⁻Si alloy before and after refinement. The refinement results sho...
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| Format: | Article |
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MDPI AG
2019-02-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/2/228 |
| _version_ | 1818951969708965888 |
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| author | Jitao Zhao Mingfang Shi Zhenqing Wang Lidan Xu |
| author_facet | Jitao Zhao Mingfang Shi Zhenqing Wang Lidan Xu |
| author_sort | Jitao Zhao |
| collection | DOAJ |
| description | Through studying the effects of the Al⁻5Ti-<i>x</i>(Mg⁻30%Ce) refiner on the microstructure of the Al⁻7Si alloy, we investigated the hardness, tensile, and impact properties of the Al⁻Si alloy before and after refinement. The refinement results show that Mg⁻30%Ce can improve the refinement effect of Al⁻5Ti on Al⁻7Si, and also refine α-Al and eutectic Si in Al⁻7Si. When 2%Mg⁻30%Ce is added, the refining effect of the aluminum⁻silicon alloy is most obvious. After refinement, the hardness and tensile properties of the Al⁻7Si alloy improve. When 2%Mg⁻30%Ce is added to the refiner, the tensile properties of the Al⁻Si alloy are the best. Dynamic mechanical tests were conducted on refined Al⁻7Si alloy. The impact toughness of Al⁻7Si⁻(Al⁻5Ti-2(Mg⁻30%Ce) improved and the impact toughness reached 34.91 J/cm<sup>2</sup>, which is 78.7% higher than that of Al⁻7Si⁻(Al⁻5Ti) specimens. The separate Hopkinson pressure bar test results show that, under a high strain rate, the strain rate sensitivity of the prepared Al⁻Si alloy is significant. The specimens of Al⁻7Si⁻(Al⁻5Ti-2(Mg⁻30%Ce) demonstrated the best anti-impact performance at the same velocity. |
| first_indexed | 2024-12-20T09:42:56Z |
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| id | doaj.art-0d9b851721b44147955e4c5da5163c13 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T09:42:56Z |
| publishDate | 2019-02-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-0d9b851721b44147955e4c5da5163c132022-12-21T19:44:49ZengMDPI AGMetals2075-47012019-02-019222810.3390/met9020228met9020228Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si AlloyJitao Zhao0Mingfang Shi1Zhenqing Wang2Lidan Xu3College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaThrough studying the effects of the Al⁻5Ti-<i>x</i>(Mg⁻30%Ce) refiner on the microstructure of the Al⁻7Si alloy, we investigated the hardness, tensile, and impact properties of the Al⁻Si alloy before and after refinement. The refinement results show that Mg⁻30%Ce can improve the refinement effect of Al⁻5Ti on Al⁻7Si, and also refine α-Al and eutectic Si in Al⁻7Si. When 2%Mg⁻30%Ce is added, the refining effect of the aluminum⁻silicon alloy is most obvious. After refinement, the hardness and tensile properties of the Al⁻7Si alloy improve. When 2%Mg⁻30%Ce is added to the refiner, the tensile properties of the Al⁻Si alloy are the best. Dynamic mechanical tests were conducted on refined Al⁻7Si alloy. The impact toughness of Al⁻7Si⁻(Al⁻5Ti-2(Mg⁻30%Ce) improved and the impact toughness reached 34.91 J/cm<sup>2</sup>, which is 78.7% higher than that of Al⁻7Si⁻(Al⁻5Ti) specimens. The separate Hopkinson pressure bar test results show that, under a high strain rate, the strain rate sensitivity of the prepared Al⁻Si alloy is significant. The specimens of Al⁻7Si⁻(Al⁻5Ti-2(Mg⁻30%Ce) demonstrated the best anti-impact performance at the same velocity.https://www.mdpi.com/2075-4701/9/2/228Al–Ti–Mg–Cemicrostructurerefinealuminum-silicon alloymechanical propertySHPB |
| spellingShingle | Jitao Zhao Mingfang Shi Zhenqing Wang Lidan Xu Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy Metals Al–Ti–Mg–Ce microstructure refine aluminum-silicon alloy mechanical property SHPB |
| title | Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy |
| title_full | Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy |
| title_fullStr | Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy |
| title_full_unstemmed | Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy |
| title_short | Effect of a New Grain Refiner (Al–Ti–Mg–Ce) on Hardness, Tensile, and Impact Properties of Al–7Si Alloy |
| title_sort | effect of a new grain refiner al ti mg ce on hardness tensile and impact properties of al 7si alloy |
| topic | Al–Ti–Mg–Ce microstructure refine aluminum-silicon alloy mechanical property SHPB |
| url | https://www.mdpi.com/2075-4701/9/2/228 |
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