Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy
The flow stress behavior and corrosive properties of Al-7Si alloy were studied by thermal compression test, electrochemical test, and electron probe microanalysis. The influences of temperatures, strain rates, strains, and morphology of Si particles on stress-strain curves of Al-7Si alloy were analy...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/7/2697 |
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| author | Kai Du Liying Song Shaohui Huang Xiaoguang Yuan |
| author_facet | Kai Du Liying Song Shaohui Huang Xiaoguang Yuan |
| author_sort | Kai Du |
| collection | DOAJ |
| description | The flow stress behavior and corrosive properties of Al-7Si alloy were studied by thermal compression test, electrochemical test, and electron probe microanalysis. The influences of temperatures, strain rates, strains, and morphology of Si particles on stress-strain curves of Al-7Si alloy were analyzed. The peak stress of unmodified-Al-7Si alloy is higher than that of Sr-modified-Al-7Si alloy at the same deformation conditions, and the phenomenon is obviously relevant to the distribution and morphology of Si particles. The morphology of Si particles of unmodified-undeformed-Al-7Si alloy is a typical thick layer, and that of unmodified-deformed-Al-7Si alloy is broken into relatively small particles and the distribution is relatively even in homogeneous deformation zone II. The distribution of Si particles in Sr-modified-deformed-Al-7Si alloy is obviously more even than undeformed alloy. The effect of a small deformation of 20% on the distribution and morphology of Si particles is obviously smaller than that of a large deformation of 50%. The electrochemical self-corrosion potential of Sr-modified-Al-7Si alloy is higher than that of unmodified-Al-7Si alloy, and it proves that the distribution and morphology of Si particles have a certain influence on the corrosive properties of Al-7Si alloy. That is, the even fine Si particles are more conducive to improving the corrosive properties of Al-7Si alloy. |
| first_indexed | 2024-03-09T11:39:36Z |
| format | Article |
| id | doaj.art-ccbf43061cc7467a91c63edccfea285e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:39:36Z |
| publishDate | 2022-04-01 |
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| spelling | doaj.art-ccbf43061cc7467a91c63edccfea285e2023-11-30T23:35:43ZengMDPI AGMaterials1996-19442022-04-01157269710.3390/ma15072697Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si AlloyKai Du0Liying Song1Shaohui Huang2Xiaoguang Yuan3School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaThe State Key Laboratory of Rolling Automation, Northeastern University, Shenyang 110819, ChinaDepartment of Technical Planning Press Shop, BMW Brilliance Automotive Ltd., Shenyang 100044, ChinaSchool of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, ChinaThe flow stress behavior and corrosive properties of Al-7Si alloy were studied by thermal compression test, electrochemical test, and electron probe microanalysis. The influences of temperatures, strain rates, strains, and morphology of Si particles on stress-strain curves of Al-7Si alloy were analyzed. The peak stress of unmodified-Al-7Si alloy is higher than that of Sr-modified-Al-7Si alloy at the same deformation conditions, and the phenomenon is obviously relevant to the distribution and morphology of Si particles. The morphology of Si particles of unmodified-undeformed-Al-7Si alloy is a typical thick layer, and that of unmodified-deformed-Al-7Si alloy is broken into relatively small particles and the distribution is relatively even in homogeneous deformation zone II. The distribution of Si particles in Sr-modified-deformed-Al-7Si alloy is obviously more even than undeformed alloy. The effect of a small deformation of 20% on the distribution and morphology of Si particles is obviously smaller than that of a large deformation of 50%. The electrochemical self-corrosion potential of Sr-modified-Al-7Si alloy is higher than that of unmodified-Al-7Si alloy, and it proves that the distribution and morphology of Si particles have a certain influence on the corrosive properties of Al-7Si alloy. That is, the even fine Si particles are more conducive to improving the corrosive properties of Al-7Si alloy.https://www.mdpi.com/1996-1944/15/7/2697Al-7Si alloystress-strain curvesthermal compression testcorrosive propertiesmicrostructures |
| spellingShingle | Kai Du Liying Song Shaohui Huang Xiaoguang Yuan Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy Materials Al-7Si alloy stress-strain curves thermal compression test corrosive properties microstructures |
| title | Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy |
| title_full | Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy |
| title_fullStr | Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy |
| title_full_unstemmed | Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy |
| title_short | Influence of Modification on Flow Stress Behavior and Corrosive Properties of a Hypoeutectic Al-Si Alloy |
| title_sort | influence of modification on flow stress behavior and corrosive properties of a hypoeutectic al si alloy |
| topic | Al-7Si alloy stress-strain curves thermal compression test corrosive properties microstructures |
| url | https://www.mdpi.com/1996-1944/15/7/2697 |
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