Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys
The effect of the addition of Be and Sc on the microstructure and mechanical properties of A357 alloy were systematically investigated. The results show that the addition of small amounts of Be and Sc could change the acicular structure of iron-bearing intermetallic compounds to harmless compact Al-...
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MDPI AG
2018-03-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/8/3/194 |
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| author | Yu-Chih Tzeng Jo-Kuang Nieh Hui-Yun Bor Sheng-Long Lee |
| author_facet | Yu-Chih Tzeng Jo-Kuang Nieh Hui-Yun Bor Sheng-Long Lee |
| author_sort | Yu-Chih Tzeng |
| collection | DOAJ |
| description | The effect of the addition of Be and Sc on the microstructure and mechanical properties of A357 alloy were systematically investigated. The results show that the addition of small amounts of Be and Sc could change the acicular structure of iron-bearing intermetallic compounds to harmless compact Al-Fe-Si and Sc-Fe iron-bearing intermetallic compounds. Compact iron-bearing intermetallic compounds could improve fluidity, causing a reduction in interdendritic shrinkage during solidification. The addition of 0.05 wt % Be enhanced the quality index of the A357 alloy by 11% and increased the notch-yield ratio of fracture toughness by 4.5%. In contrast, the addition of 0.05 wt % Sc increased the quality index and the notch to yield ratio of fracture toughness up to 17% and 9%, respectively. Therefore, the microstructure and mechanical properties of the A357 alloy could be improved by substituting Be with Sc. |
| first_indexed | 2024-12-20T12:30:03Z |
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| id | doaj.art-1c94fc9cabe040ac8f7de8973b393b55 |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T12:30:03Z |
| publishDate | 2018-03-01 |
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| spelling | doaj.art-1c94fc9cabe040ac8f7de8973b393b552022-12-21T19:40:45ZengMDPI AGMetals2075-47012018-03-018319410.3390/met8030194met8030194Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 AlloysYu-Chih Tzeng0Jo-Kuang Nieh1Hui-Yun Bor2Sheng-Long Lee3Department of Power Vehicle and Systems Engineering, CCIT, National Defense University, Taoyuan 320-338, TaiwanMaterials and Electro-Optics Research Division, National Chung-Shan Institute of Science and Technology, Taoyuan 320-338, TaiwanMaterials and Electro-Optics Research Division, National Chung-Shan Institute of Science and Technology, Taoyuan 320-338, TaiwanDepartment of Mechanical Engineering, National Central University, Taoyuan 320-338, TaiwanThe effect of the addition of Be and Sc on the microstructure and mechanical properties of A357 alloy were systematically investigated. The results show that the addition of small amounts of Be and Sc could change the acicular structure of iron-bearing intermetallic compounds to harmless compact Al-Fe-Si and Sc-Fe iron-bearing intermetallic compounds. Compact iron-bearing intermetallic compounds could improve fluidity, causing a reduction in interdendritic shrinkage during solidification. The addition of 0.05 wt % Be enhanced the quality index of the A357 alloy by 11% and increased the notch-yield ratio of fracture toughness by 4.5%. In contrast, the addition of 0.05 wt % Sc increased the quality index and the notch to yield ratio of fracture toughness up to 17% and 9%, respectively. Therefore, the microstructure and mechanical properties of the A357 alloy could be improved by substituting Be with Sc.http://www.mdpi.com/2075-4701/8/3/194A357 alloyscandiummicrostructuremechanical properties |
| spellingShingle | Yu-Chih Tzeng Jo-Kuang Nieh Hui-Yun Bor Sheng-Long Lee Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys Metals A357 alloy scandium microstructure mechanical properties |
| title | Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys |
| title_full | Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys |
| title_fullStr | Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys |
| title_full_unstemmed | Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys |
| title_short | Effect of Trace Be and Sc Additions on the Mechanical Properties of A357 Alloys |
| title_sort | effect of trace be and sc additions on the mechanical properties of a357 alloys |
| topic | A357 alloy scandium microstructure mechanical properties |
| url | http://www.mdpi.com/2075-4701/8/3/194 |
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