Fretting fatigue characteristics of Ti-6Al-4V alloy with a gradient nanostructured surface layer induced by ultrasonic surface rolling process

Liu, Chengsong; Liu, Daoxin; Zhang, Xiaohua; Ao, Ni; Xu, Xingchen; Liú, Dan; Yang, Jing

doi:10.1016/j.ijfatigue.2019.03.042

Cited by 76 publications

(16 citation statements)

References 63 publications

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“…To improve the performance of the workpiece, the surface plastic forming method was used for surface modification in the final stage of processing. In recent years, researchers have developed various surface treatment (UST) processes based on UV, such as ultrasonic shot peening [103][104][105], ultrasonic impact treatment [106][107][108], and ultrasonic surface rolling [85,109,110]; the principles of the different UST processes are similar. Severe plastic deformation on the material surface is caused by high-frequency vibration tools, which rapidly change the structure of the surface layer and improve the mechanical properties of the material, such as the elongation and yield ratio [86,87,108,[111][112][113][114][115].…”

Section: Strengthen Surface Structurementioning

confidence: 99%

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Shao

Zhan

2021

Chin. J. Mech. Eng.

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Compared with conventional forming processes, ultrasonic-assisted forming technology with a high frequency and small amplitude can significantly improve the forming quality of materials. Owing to the advantages of reduced forming force, improved surface quality, avoidance of forming defects, and strengthened surface structure, ultrasonic-assisted forming technology has been applied to increasingly advanced forming processes, such as incremental forming, spinning, and micro-forming. However, in the ultrasonic-assisted forming process, there are multiple ultrasonic mechanisms, such as the volume effect and surface effect. The explanation of the effect of ultrasonic vibration (UV) on plastic deformation remains controversial, hindering the development of related technologies. Recently, many researchers have proposed many new theories and technologies for ultrasonic-assisted forming. To summarize these developments, systematic discussions on mechanisms, theoretical models, and forming performances are provided in this review. On this basis, the limitations of the current study are discussed. In addition, an outlook for ultrasonic-assisted forming is proposed: efficient and stable UV systems, difficulty forming components with complex geometry, explanation of the in-depth mechanism, a systematic theoretical prediction model, and multi-field-coupling energy-assisted forming are considered to be hot spots in future studies. The present review enhances existing knowledge of ultrasonic-assisted forming, and facilitates a fast reference for related researchers.

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Section: Strengthen Surface Structurementioning

confidence: 99%

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Shao

Zhan

2021

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

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“…It is also found that the different surface treatments (substrate: BM, shot peening: SP, IBED CrN coating: CN, CuNiIn coating: Cu) on Ti -6Al-4V alloy can effectively improve the fretting fatigue life [17]. Compared with USRP, mechanical surface polishing would weaken the fretting fatigue performance of Ti-6Al-4V [18]. In terms of improving fatigue strength, the residual compressive stress produced by USRP is better than the surface gradient nanostructures produced by mechanical surface polishing.…”

Section: Introductionmentioning

confidence: 98%

Influence of Ultrasonic Surface Rolling Process and Shot Peening on Fretting Fatigue Performance of Ti-6Al-4V

Wang

Zhu

Liu

et al. 2021

Preprint

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The shot-peening (SP) and ultrasonic surface rolling process (USRP) were performed on Ti–6Al-4V plate specimens. The surface hardness and residual stresses of the material were tested by vickers indenter and X-ray diffraction residual stress analyzer. The effects of different surface strengthening on its fretting fatigue properties were verified by fretting fatigue experiments. It is shown (i) that the fretting fatigue life of Ti–6Al-4V effectively improved after USRP and SP and（ii）that the surface integrity of specimens after USRP is the best, which has deeper residual compressive stress layer and more refined grain. The fretting fatigue fracture surface and wear morphology of the samples were studied and analyzed by means of microscopic observation, and the mechanism of improving fretting fatigue life by surface strengthening process was further explained

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“…In addition, the USRP can not only form a nanoscale microstructure gradient on the surface of the material but also significantly improve the microhardness gradient and residual stress gradient on the surface of the material. However, these effects cannot be achieved by traditional surface strengthening technology [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Ultrasonic Assisted Surface Rolling Process on the Fatigue Crack Initiation Position Distribution and Fatigue Life of 51CrV4 Spring Steel

et al. 2021

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In this paper, the effects of the fatigue crack initiation position (FCIP) on fatigue life are discussed. Different modified gradient fields (MGFs) are prepared on the surface of 51CrV4 spring steel components by an ultrasonic assisted surface rolling process (USRP). Subsequently, the fatigue behaviour of steels with different FCIPs is systematically studied. The results show that the fatigue life of steels first exhibits an increasing tendency and then a decreasing tendency with increasing distance between an FCIP and the surface. When an FCIP shifts from the surface of the sample to the interior, the fatigue crack initiation resistance on the interior is greater than that on the surface, which leads to an increase in fatigue life. However, when the FCIP further shifts towards the centre of the specimen, the stress triaxiality experienced by the fatigue source gradually increases, which results in a peak in the curve of FCIP versus fatigue life. The magnitude of this peak fatigue life is related to the change in the stress triaxiality. Moreover, according to focused ion beam-high-resolution transmission electron microscopy (FIB-HRTEM) microstructural analysis near FCIPs, under a higher stress triaxiality, the crack tip area is subject to greater stress constraints, making the multiplication and movement of dislocations in this area more difficult, resulting in the decrease in movable dislocation density. This decrease in dislocation density leads to an increase in the stress concentration and accelerates the crack growth rate, decreasing the fatigue life. Therefore, the significant change in fatigue life is controlled by the MGF and stress triaxiality.

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Fretting fatigue characteristics of Ti-6Al-4V alloy with a gradient nanostructured surface layer induced by ultrasonic surface rolling process

Cited by 76 publications

References 63 publications

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

A Review on Ultrasonic-Assisted Forming: Mechanism, Model, and Process

Influence of Ultrasonic Surface Rolling Process and Shot Peening on Fretting Fatigue Performance of Ti-6Al-4V

Effects of the Ultrasonic Assisted Surface Rolling Process on the Fatigue Crack Initiation Position Distribution and Fatigue Life of 51CrV4 Spring Steel

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