Fatigue Performance Improvement of 7075-T651 Aluminum Alloy by Ultrasonic Nanocrystal Surface Modification
| العنوان: | Fatigue Performance Improvement of 7075-T651 Aluminum Alloy by Ultrasonic Nanocrystal Surface Modification |
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| المؤلفون: | Weidong Zhao, Richard Chiang, Guo-Xiang Wang, Zhencheng Ren, Yalin Dong, Chang Ye, Ruixia Zhang, Vijay K. Vasudevan, Hao Zhang |
| المصدر: | Journal of Materials Engineering and Performance. 31:2354-2363 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, Mechanical Engineering, Alloy, engineering.material, Indentation hardness, Nanocrystal, Mechanics of Materials, Residual stress, engineering, Surface roughness, Pitting corrosion, Surface modification, General Materials Science, Composite material, Stress concentration |
| الوصف: | In this research, ultrasonic nanocrystal surface modification (UNSM) was used to process a 7075-T651 aluminum alloy. After UNSM treatment, a work-hardened layer with compressive residual stress up to 500 MPa was generated on the near-surface region of the sample. The surface microhardness of the alloy was increased from 195 ± 4 to 225 ± 7 HV, and the surface roughness was decreased from 1.32 ± 0.04 to 0.54 ± 0.27 µm. The stress concentration factor Kt of the as-received specimen was decreased from 1.080 to 1.069 after UNSM processing. Rotating–bending fatigue tests showed that UNSM significantly improved the fatigue performance. In addition, UNSM-treated 7075-T651 samples were able to endure pitting corrosion in a 3.5 wt.% NaCl solution for 72 h without any degradation in fatigue performance. These results demonstrated that UNSM is a robust surface modification method that can improve the rotating–bending fatigue resistance of the aluminum alloy. |
| تدمد: | 1544-1024 1059-9495 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::cdbcbcb648a402c7c3bde3cb1a7b4e90 https://doi.org/10.1007/s11665-021-06308-9 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........cdbcbcb648a402c7c3bde3cb1a7b4e90 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15441024 10599495 |
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