Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect
Ultrasonic surface rolling process is a novel surface enhancement technique that significantly influences the surface integrity and fatigue performance of titanium alloys. In this study, the ultrasonic impact strengthening mechanism was researched by single-point ultrasonic impact strengthening expe...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425000249 |
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| author | Xuming Zha Hao Qin Zhi Yuan Linqing Xi Xiao Chen Yi Li Qingshan Jiang Zhilong Xu Feng Jiang |
| author_facet | Xuming Zha Hao Qin Zhi Yuan Linqing Xi Xiao Chen Yi Li Qingshan Jiang Zhilong Xu Feng Jiang |
| author_sort | Xuming Zha |
| collection | DOAJ |
| description | Ultrasonic surface rolling process is a novel surface enhancement technique that significantly influences the surface integrity and fatigue performance of titanium alloys. In this study, the ultrasonic impact strengthening mechanism was researched by single-point ultrasonic impact strengthening experiment and verified in ultrasonic surface rolling process under actual working conditions. The effects of different ultrasonic impact amplitudes on the deformation strain rate, surface morphology, microstructure, hardness field and residual compressive stress field of Ti–6Al–4V workpieces after USRP were investigated. In the process of single point ultrasonic impact, the impact kinetic energy applied to the workpiece surface is positively correlated with the ultrasonic amplitude, and this could lead to a high strain rate plastic deformation of the material surface. After USRP treatment, the hardness distribution of the workpiece in the depth direction shows a trend of first increasing and then decreasing until it reaches the hardness level of the substrate. Compared with the deeper layer deformed region, the number of low-angle grain boundaries (LAGB) was larger at the surface layer of workpiece, which indicates that the degree of grain refinement is significantly improved. The fatigue failure mechanisms and the characteristics of fatigue crack initiation and propagation were studied. Under the condition of ultrasonic amplitude of 4 μm, the fatigue life of Ti–6Al–4V workpiece after USRP could reach about 7,529,116 cycles. This study could provide effective guidance for the mechanisms of ultrasonic impact strengthening and the selection of appropriate ultrasonic impact parameters for titanium alloy workpiece. |
| format | Article |
| id | doaj-art-0a063510016148399ef6b2333828c4e6 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-0a063510016148399ef6b2333828c4e62025-08-20T02:36:28ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013541643410.1016/j.jmrt.2025.01.024Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effectXuming Zha0Hao Qin1Zhi Yuan2Linqing Xi3Xiao Chen4Yi Li5Qingshan Jiang6Zhilong Xu7Feng Jiang8College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, China; State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China; Corresponding author. College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, China.College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaCollege of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen, 361021, ChinaInstitute of Manufacturing Engineering, Huaqiao University, Xiamen, 361021, China; Corresponding author.Ultrasonic surface rolling process is a novel surface enhancement technique that significantly influences the surface integrity and fatigue performance of titanium alloys. In this study, the ultrasonic impact strengthening mechanism was researched by single-point ultrasonic impact strengthening experiment and verified in ultrasonic surface rolling process under actual working conditions. The effects of different ultrasonic impact amplitudes on the deformation strain rate, surface morphology, microstructure, hardness field and residual compressive stress field of Ti–6Al–4V workpieces after USRP were investigated. In the process of single point ultrasonic impact, the impact kinetic energy applied to the workpiece surface is positively correlated with the ultrasonic amplitude, and this could lead to a high strain rate plastic deformation of the material surface. After USRP treatment, the hardness distribution of the workpiece in the depth direction shows a trend of first increasing and then decreasing until it reaches the hardness level of the substrate. Compared with the deeper layer deformed region, the number of low-angle grain boundaries (LAGB) was larger at the surface layer of workpiece, which indicates that the degree of grain refinement is significantly improved. The fatigue failure mechanisms and the characteristics of fatigue crack initiation and propagation were studied. Under the condition of ultrasonic amplitude of 4 μm, the fatigue life of Ti–6Al–4V workpiece after USRP could reach about 7,529,116 cycles. This study could provide effective guidance for the mechanisms of ultrasonic impact strengthening and the selection of appropriate ultrasonic impact parameters for titanium alloy workpiece.http://www.sciencedirect.com/science/article/pii/S2238785425000249Ultrasonic surface rolling processStrengthening mechanismStrain rate effectSurface integrityFatigue properties |
| spellingShingle | Xuming Zha Hao Qin Zhi Yuan Linqing Xi Xiao Chen Yi Li Qingshan Jiang Zhilong Xu Feng Jiang Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect Journal of Materials Research and Technology Ultrasonic surface rolling process Strengthening mechanism Strain rate effect Surface integrity Fatigue properties |
| title | Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect |
| title_full | Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect |
| title_fullStr | Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect |
| title_full_unstemmed | Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect |
| title_short | Surface integrity and fatigue properties of Ti–6Al–4V alloy under the ultrasonic surface rolling process excited strain rate effect |
| title_sort | surface integrity and fatigue properties of ti 6al 4v alloy under the ultrasonic surface rolling process excited strain rate effect |
| topic | Ultrasonic surface rolling process Strengthening mechanism Strain rate effect Surface integrity Fatigue properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425000249 |
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