| YANG Yu-hui,WEI Xin,LONG Zhi-li,DU Zhi-gang,LI Yi.Review on Fatigue Evolution of Surface State Characteristics of Deformation Strengthened Metal Materials[J],52(6):112-125, 234 |
| Review on Fatigue Evolution of Surface State Characteristics of Deformation Strengthened Metal Materials |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.06.011 |
| KeyWord:surface deforming strengthening surface state characteristics residual stress working hardening microstructure fatigue evolution |
| Author | Institution |
| YANG Yu-hui |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| WEI Xin |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| LONG Zhi-li |
School of Mechanical Engineering and Automation, Harbin Institute of Technology Shenzhen, Guangdong Shenzhen , China |
| DU Zhi-gang |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
| LI Yi |
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou , China |
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| Abstract: |
| Surface deformation strengthening technology can significantly improve the fatigue properties of metal materials, so it can be widely used in aerospace, rail transit, marine ships, and other fields. This technology has been improved and its application has been expanded recently due to the development of new surface strengthening technologies such as laser shot peening, ultrasonic shot peening, and ultrasonic rolling. Many studies have shown that the enhancement of fatigue properties of metal materials by surface deformation strengthening technology is mainly attributed to the synergistic effect of surface state characteristics such as compressive residual stress, work hardening, and microstructure. In the last decades, a lot of research work has been carried out on the surface deformation strengthening processing equipment, processing process, and mechanical properties of materials. However, there are few systematic reviews on the fatigue evolution of surface state characteristics such as residual stress, work hardening, and surface microstructure of deformation strengthened materials. Compressive residual stress is one of the most critical factors of metal fatigue performance. When a heavy load is applied, the stress strengthening effect caused by residual compressive residual stress might disappear, and the work hardening effect would also decrease or even disappear. At this time, the strengthening mechanism of the organizational structure induced by surface deformation plays a leading role. The work aims to explore the research progress of fatigue evolution of surface state characteristics such as residual stress, work hardening, and microstructure of metal materials after surface deformation strengthening under the effect of thermal load or mechanical load, to find out the relationship among residual stress, work hardening and microstructure, and the synergistic effect of them on the fatigue properties of metal materials. Firstly, the effects of thermal load factors (such as temperature, thermal exposure time, etc.) and mechanical load factors (such as stress amplitude, strain amplitude, cycle numbers, etc.) on the relaxation behavior of residual stress were discussed, and the theoretical prediction models of the relaxation behavior of residual stress was summarized. Secondly, the evolution laws of work hardening under thermal load or mechanical load affected by the factors of temperature, thermal exposure time, stress amplitude, strain amplitude, cycle numbers, etc. was outlined. It was found that the relaxation behavior of work hardening was similar to the relaxation behavior of residual stress and the work hardening had higher stability than residual stress. Then, the microstructure evolution law and mechanism of the strengthened surface under thermal load, mechanical load, or thermal-mechanical coupling load were reviewed. Based on the above reviews, the effects of work hardening (such as work hardening level, distribution gradient along with the depth, etc.) on the relaxation behavior of residual stress and microstructure change were discussed. The research progress on the internal relationship among surface state characteristic factors such as residual stress, work hardening, and microstructure was discussed. Finally, some problems and shortcomings in the current research on surface deformation strengthening of metal materials were analyzed, and the future research and development of the anti-fatigue manufacturing technology by surface deformation strengthening were proposed. |
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