Enhanced strength and sliding wear properties of gas nitrided Ti-6Al-4V alloy by ultrasonic shot peening pretreatment

Xu, Shuo; Cao, Yi; Duan, Bingbing; Liu, Haitao; Wang, Junbiao; Si, Chaorun

doi:10.1016/j.surfcoat.2023.129325

Cited by 27 publications

(6 citation statements)

References 55 publications

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“…Therefore, in order to improve the service life and reliability of titanium alloy actuators, it is of great significance to develop efficient anti-wear strengthening processes for titanium alloys. At present, nitriding technology is usually used to improve the surface hardness and wear resistance of titanium alloys, and the related nitriding technologies mainly include ion nitriding, gas nitriding, and laser nitriding [11][12][13][14][15]. Among them, ion nitriding technology, as a green nitriding method with less environmental pollution, has the characteristics of high activity, fast permeability and easy control of permeability.…”

Section: Introductionmentioning

confidence: 99%

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Liu,

Li,

et al. 2024

Eng. Res. Express

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TC6 titanium alloy, also known as Ti-6Al-1.5Cr-2.5Mo, is one of the most widely used titanium alloys in the aerospace industry due to its high specific strength, corrosion resistance and excellent mechanical properties. However, its poor wear resistance limits its application in some situations, such as aircraft actuators. To improve its wear resistance, this paper performs ion nitriding treatment on TC6 titanium alloy for aircraft cylinder and studies its wear performance. The ion nitriding test is conducted for 16 h at 820°C using a bell-type titanium alloy ion nitriding furnace. The nitrided specimen is divided into three parts: nitrided layer, diffusion layer, and substrate layer. The nitrided layer was 4.11 μm thick and consisted of TiN and Ti2N phases. The diffusion layer was 13.69 μm thick and mainly composed of a gap solid solution formed by N element solid dissolved in α-Ti. After nitriding, the surface hardness of the specimen increased to 1105.2 HV, which is 2.37 times higher than that of the matrix. The hardness-affected layer is about 200 μm thick. The wear rate is reduced by 99.78 % compared with that of the matrix, indicating that ionic nitriding greatly improves the wear resistance of TC6 titanium alloy. The wear mechanism of the nitriding specimen differs from that of the matrix, mainly due to abrasive wear, while the wear mechanism of the matrix is a combination of adhesive wear and abrasive wear.

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Section: Introductionmentioning

confidence: 99%

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Liu,

Li,

et al. 2024

Eng. Res. Express

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“…When the direct manipulation of raw materials is challenging, surface modification emerges as a robust strategy to enhance both performance and durability, particularly for materials subjected to harsh environments or extreme conditions. To enhance surface properties, various advanced surface modification techniques have been developed, including plasma or gas nitriding [33,34], magnetron sputtering [35], and ion implantation [36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dose Rate on Tribological Properties of 8Cr4Mo4V Subjected to Plasma Immersion Ion Implantation

Miao,

Niu,

Guo

et al. 2024

Processes

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The lack of service lifetime of bearings has become a bottleneck that restricts the performance of aero engines. How to solve or improve this problem is the focus of most surface engineering researchers at present. In this study, plasma immersion ion implantation was conducted; in order to enhance the ion implantation efficiency and improve the wear resistance of 8Cr4Mo4V bearing steel, the dose-rate-enhanced method was adopted during ion implantation. The surface roughness, phase constituents, elemental concentration, hardness, contact angle and wear resistance of samples after ion implantation was determined by atomic force microscopy (AFM), grazing incidence X-ray diffraction (GIXRD), elemental dispersive spectroscopy (EDS), X-ray diffraction, nanoindentation tester, universal friction and wear tester, etc. The results showed that the high-dose-rate method had a significant enhancement influence on ion implantation efficiency. At the dose rate of 2.60 × 1017 ions/cm2·h, the roughness of Ra decreases from 24.8 nm to 10.4 nm, which is decreased by 58.1% for the dose rate of 7.85 × 1017 ions/cm2·h. XRD confirmed that the implanted samples consisted of the Fe(M) and Fe2–3N phase and CrN which depends on the implantation dose rate. Meanwhile, the surface hardness was improved from 11.1 GPa to 16.9 GPa and enlarged the hardened region; more valuably, the surface state of samples via high-dose-rate implantation exhibits hydrophobicity with high roughness which is able to store debris and decrease the abrasive wear during testing; thereby, the wear resistance was greatly enhanced by high-dose-rate plasma immersion ion implantation.

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“…Surface strengthening techniques that have been widely applied include ultrasonic rolling, laser cladding, ultrasonic shot peening, and laser shock processing [14][15][16][17]. In particular, ultrasonic rolling strengthening technology, due to its high standardization, low cost, and high processing efficiency, has been widely used in the aerospace manufacturing industry [18][19].…”

Section: Introductionmentioning

confidence: 99%

The effect of ultrasonic rolling on the fatigue performance of laser-welded TC4 titanium alloy joints

Jiahui,

Jiayuan,

Song

et al. 2023

Preprint

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In order to improve the fatigue performance of TC4 titanium alloy laser welded joints, ultrasonic rolling treatment was adopted in this study, and different passes of rolling process were used. The research results show that the ultrasonic rolling treatment significantly improves the fatigue limit and fatigue life of the weldment. At room temperature, the fatigue strength of the weldment increases by 2.04–4.58%, and the corrosion fatigue life increases by 1.71 to 3.05 times. This study also deeply analyzed the significant effects of ultrasonic rolling treatment on surface morphology, microstructure, surface residual stress and microhardness to reveal its strengthening mechanism. It was found that the ultrasonic rolling treatment shifted the crack initiation point to the subsurface and formed a hard layer with high residual stress on the surface by applying significant static pressure input and multiple treatments. This change makes the fatigue stripes narrower and denser. Compared with the traditional weld surface treatment method, ultrasonic rolling treatment significantly improves the surface quality and fatigue performance of TC4 titanium alloy laser welded joints.

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Enhanced strength and sliding wear properties of gas nitrided Ti-6Al-4V alloy by ultrasonic shot peening pretreatment

Cited by 27 publications

References 55 publications

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Improving the wear performance of TC6 Titanium alloy by ion nitriding treatment

Effect of Dose Rate on Tribological Properties of 8Cr4Mo4V Subjected to Plasma Immersion Ion Implantation

The effect of ultrasonic rolling on the fatigue performance of laser-welded TC4 titanium alloy joints

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