Advances in Manufacturing ›› 2025, Vol. 13 ›› Issue (3): 562-583.doi: 10.1007/s40436-024-00525-w

• • 上一篇    

Surface softening mechanism based on microstructure analyses under ultrasonic impact condition for Ti-17 titanium alloy

Chang-Feng Yao1,2, Wen-Hao Tang1,2, Liang Tan1,2, Min-Chao Cui1,2, Yun-Qi Sun1,2, Tao Fan1,2, Xu-Hang Gao1,2   

  1. 1. Key Laboratory of High Performance Manufacturing for Aero Engine, Northwestern Polytechnical University, Ministry of Industry and Information Technology, Xi'an, 710072, People's Republic of China;
    2. Engineering Research Center of Advanced Manufacturing Technology for Aero Engine, Ministry of Education, Xi'an, 710072, People's Republic of China
  • 收稿日期:2023-12-16 修回日期:2024-02-03 发布日期:2025-09-19
  • 通讯作者: Chang-Feng Yao,E-mail:chfyao@nwpu.edu.cn;Liang Tan,E-mail:tanliang@nwpu.edu.cn E-mail:chfyao@nwpu.edu.cn;tanliang@nwpu.edu.cn
  • 作者简介:Chang-Feng Yao received the Ph.D degree in Aeronautical and Astronautical Manufacturing Engineering from Northwestern Polytechnical University in 2006. Now he is a Professor at Northwestern Polytechnical University. His research interests include precision and antifatigue machining of key components of Aeroengine.
    Wen-Hao Tang graduated from Northwestern Polytechnical University. And now is a master student at Northwestern Polytechnical University. His research interest is aero engine high-tech manufacturing.
    Liang Tan received the Ph.D degree in Aeronautical and Astronautical Manufacturing Engineering from Northwestern Polytechnical University in 2018. Now he is an assistant research fellow at Northwestern Polytechnical University. His research interests include cutting mechanism and surface integrity control technology of Aeronautical materials.
    Min-Chao Cui received the Ph.D degree in Mechanical Engineering from Xi’an Jiaotong University in 2019. Now he is a professor at Northwestern Polytechnical University. Rich interdisciplinary research experience in the fields of intelligent sensing in manufacturing processes, aerospace fatigue resistance manufacturing, online detection and diagnosis of laser induced breakdown spectroscopy, and intelligent control of complex electromechanical systems.
    Yun-Qi Sun received the M.S degree in Aeronautical and Astronautical Manufacturing Engineering from Northwestern Polytechnical University in 2020. Now he is a Ph.D student at Northwestern Polytechnical University. His research interest is Surface Strengthening and Finishing Technology.
    Tao Fan received the M.S degree in mechanical Engineering from Guizhou University in 2019. Now he is a Ph.D student at Northwestern Polytechnical University. His research interest is energy field assisted machining and surface integrity control technology of Aeronautical materials
    Xu-Hang Gao received the bachelor’s degree from Northwestern Polytechnical University in 2021. Now he is a Master degree student at Northwestern Polytechnical University. His research interest includes cutting mechanism, surface integrity and microstructure evolution.
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.92160301, 92360309), and the Innovation Capability Support Program of Shaanxi Province (Grant No.2022TD-60).

Surface softening mechanism based on microstructure analyses under ultrasonic impact condition for Ti-17 titanium alloy

Chang-Feng Yao1,2, Wen-Hao Tang1,2, Liang Tan1,2, Min-Chao Cui1,2, Yun-Qi Sun1,2, Tao Fan1,2, Xu-Hang Gao1,2   

  1. 1. Key Laboratory of High Performance Manufacturing for Aero Engine, Northwestern Polytechnical University, Ministry of Industry and Information Technology, Xi'an, 710072, People's Republic of China;
    2. Engineering Research Center of Advanced Manufacturing Technology for Aero Engine, Ministry of Education, Xi'an, 710072, People's Republic of China
  • Received:2023-12-16 Revised:2024-02-03 Published:2025-09-19
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos.92160301, 92360309), and the Innovation Capability Support Program of Shaanxi Province (Grant No.2022TD-60).

摘要: Ultrasonic impact significantly influences the mechanical properties and flow stress of Ti-17 titanium alloy. In this study, compression tests on Ti-17 titanium alloy were conducted under ultrasonic impact conditions, varying ultrasonic amplitudes and compression rates. The flow stress, surface elemental content, microhardness, and microstructure of Ti-17 titanium alloy were tested, and the softening mechanism of Ti-17 titanium alloy under ultrasonic impact conditions was investigated. The results indicate that the softening mechanism of Ti-17 titanium alloy involved ultrasonic softening combined with stress superposition. Ultrasonic impact leads to a higher distribution of grain orientation differences, alters the distribution of small-angle grain boundaries, and changes the distribution of surface phases, resulting in a reduced density of α phases. The geometrically necessary dislocation density at the surface increases, and the average grain size decreases from 2.91 μm to 2.73 μm. The Brass-type texture essentially disappears, transforming mainly into a Copper-type texture {112}<11-1>, with the maximum pole density decreasing from 73.98 to 39.88.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00525-w

关键词: Ultrasonic impact, Ti-17, Softening mechanism

Abstract: Ultrasonic impact significantly influences the mechanical properties and flow stress of Ti-17 titanium alloy. In this study, compression tests on Ti-17 titanium alloy were conducted under ultrasonic impact conditions, varying ultrasonic amplitudes and compression rates. The flow stress, surface elemental content, microhardness, and microstructure of Ti-17 titanium alloy were tested, and the softening mechanism of Ti-17 titanium alloy under ultrasonic impact conditions was investigated. The results indicate that the softening mechanism of Ti-17 titanium alloy involved ultrasonic softening combined with stress superposition. Ultrasonic impact leads to a higher distribution of grain orientation differences, alters the distribution of small-angle grain boundaries, and changes the distribution of surface phases, resulting in a reduced density of α phases. The geometrically necessary dislocation density at the surface increases, and the average grain size decreases from 2.91 μm to 2.73 μm. The Brass-type texture essentially disappears, transforming mainly into a Copper-type texture {112}<11-1>, with the maximum pole density decreasing from 73.98 to 39.88.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-024-00525-w

Key words: Ultrasonic impact, Ti-17, Softening mechanism