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| Fatigue Properties of 7050-T7451Thick Plate under Accelerated Corrosion Environment in Laboratory |
| Received:July 13, 2018 Revised:January 25, 2019 |
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| DOI：10.7643/ issn.1672-9242.2019.01.015 |
| KeyWord:7050 thick plate aluminum alloy material stress concentration coefficient corrosive environment fatigue per-formance |
| Author | Institution |
| ZHANG Hong-fei |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory, China Special Vehicle Research Institute, Jingmen , China |
| ZHAO Lian-hong |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory, China Special Vehicle Research Institute, Jingmen , China |
| WANG Hao-wei |
Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory, China Special Vehicle Research Institute, Jingmen , China |
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| Abstract: |
| Objective To study the corrosion fatigue properties of 7050 thick plate aluminum alloy with different stress con-centration coefficient under different corrosion conditions. Methods The corrosion fatigue experiment of 7050 thick plate alu-minum alloy was carried out in 3.5% NaCl salt water and tank water. Influences of different stress concentration coefficient and different corrosion environment on fatigue performance of 7050 thick plate aluminum alloy was analyzed by S-N curve fitting with three parameters. Results Both corrosion environment and stress concentration coefficient had effects on fatigue performance of 7050 thick plate aluminum alloy. The effect of 3.5 % NaCl salt water and tank water on the fatigue performance of the material was greater than that of the stress concentration factor. Conclusion Reducing the stress concentration coefficient of 7050 thick plate aluminum alloy and strengthening the corrosion protection of 7050 thick plate aluminum alloy could improve the fatigue performance of the material significantly. |
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