Fretting fatigue mechanism of 40CrNiMoA steel subjected to the ultrasonic surface rolling process: The role of the gradient structure

Zou, Jianghe; Liang, Yilong; Jiang, Yun; Yin, Cunhong; Huang, Chaowen; Liú, Dan; Zhu, Zhenlong; Wu, Yuzhong

doi:10.1016/j.ijfatigue.2022.107383

Cited by 30 publications

(2 citation statements)

References 42 publications

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“…This proved that the degree of plastic deformation was not sufficient, and thus the degree of grain refinement was not as good as that of C + 200P. The degree of deformation produced by C + 100P was less than that of C + 200P [35], and the pre-modification before nitriding at a pressure of 200 MPa inhibited the formation of VLGB tissue. As shown in Figure 15a, which is a TEM image of the carburized layer in the C state, the boundary of the original slate-martensite within the carburized layer could be clearly observed.…”

Section: Grain Refinement Promotes the Diffusion Of C And N Atomsmentioning

confidence: 97%

Effect of Pre-Modification by Water Jet Blasting Prior to Nitriding Vein-Like Precipitates in the Composite Diffusion Layer of M50NiL Steel

Chen

et al. 2023

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In this study, M50NiL steel was carburized (C), nitrided (N), and compound-carburized then nitrided (C + N). Vein-like grain boundaries (VLGBs) were observed in the diffusion layers of both the N and C + N states due to the limited opportunity for diffusion. Transmission electron microscopy (TEM) observation revealed that the VLGB organization differed in the N and C + N states. The VLGB organization consisted mainly of Fe4N in the N state and Fe3C and Fe4N in the C + N state. When the C state was pre-modified by a 200 MPa water jet and then nitrided (C + 200P + N), the increase in dislocation density resulted in a dislocation entanglement phenomenon that split the grains to form subcrystals. The increases in grain boundaries and dislocation density promoted the diffusion of atoms, and thus the VLGB structure was not observed in the diffusion layer of the C + 200P + N state.

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Section: Grain Refinement Promotes the Diffusion Of C And N Atomsmentioning

confidence: 97%

Effect of Pre-Modification by Water Jet Blasting Prior to Nitriding Vein-Like Precipitates in the Composite Diffusion Layer of M50NiL Steel

Chen

et al. 2023

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“…This approach maintained high impact toughness while improving the surface hardness and wear resistance of the sample. Zou et al [14] built a nanometer crystalline grain field on the surface of the 40CrNiMoA steel sample through ultrasonic rolling, allowing the test sample to have a good residual compressive stress and gradient structure of hardness, retain high impact toughness, and increase its wear life.…”

Section: Introductionmentioning

confidence: 99%

The Effects of High-Energy Composite Surface Layer Modification on the Impact Performance of the H13 Steel Cutter Ring for Shield Tunneling Machine

Xu,

Li,

et al. 2023

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The service life of the cutter ring of the shield tunneling machine affects the efficiency and cost of its tunneling. However, traditional heat treatment processes cannot simultaneously optimize both impact toughness and surface hardness, often leading to cracks or excessive wear of the cutter ring, greatly reducing their service life. According to the above situation, this paper applies high-energy composite modification treatment to H13 steel samples commonly used for the cutter ring of the hob and analyzes the impact toughness, hardness, microstructure, residual stress, and morphology characteristics of fracture of the samples under different high-energy composite modification processes. The study also investigates the effects of high-energy composite modification processes on the hardness and impact toughness of the samples. The experimental results show that the high-energy composite modification process enables the specimens to have good impact toughness and surface hardness simultaneously. The H13 steel sample has the best performance after carburizing, quenching, and laser shock modification, with a maximum surface hardness of 1017.5HV0.2 and an impact toughness of 15.64 J/cm2. Laser shock modification improves the surface residual compressive stress and hardness of H13 steel samples and also improves their impact toughness.

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Ultrasonic surface treatment techniques based on cold working: a review

Keymanesh,

Ji,

Tang

et al. 2024

Int J Adv Manuf Technol

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Fretting fatigue mechanism of 40CrNiMoA steel subjected to the ultrasonic surface rolling process: The role of the gradient structure

Cited by 30 publications

References 42 publications

Effect of Pre-Modification by Water Jet Blasting Prior to Nitriding Vein-Like Precipitates in the Composite Diffusion Layer of M50NiL Steel

Effect of Pre-Modification by Water Jet Blasting Prior to Nitriding Vein-Like Precipitates in the Composite Diffusion Layer of M50NiL Steel

The Effects of High-Energy Composite Surface Layer Modification on the Impact Performance of the H13 Steel Cutter Ring for Shield Tunneling Machine

Ultrasonic surface treatment techniques based on cold working: a review

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