Effect of pulsed magnetic field on retained austenite of quenched 8Cr4Mo4V steel under cryogenic condition

Li, Zheng; Li, Kejian; Qian, Chengkai; Wang, Dexin; Ji, Wen; Wu, Yingpeng; Cai, Zhipeng; Liu, Qu

doi:10.1016/j.jmrt.2023.02.109

Cited by 8 publications

(4 citation statements)

References 39 publications

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“…However, the phase transformation was found to be inhibited by MDCT. In the experiment, the retained austenite in the quenched M50 steel decreased by 10% after DCT, while it only decreased by 3% after MDCT [122]. The dissolution of carbon clusters was introduced for explanation.…”

Section: Combined Applications Of Pmtmentioning

confidence: 94%

“…By regulating defect states in the material, PMT can be coupled with other methods to improve their treatment effects to a greater level. Deep cryogenic treatment (DCT) is a special kind of heat treatment, and the pulsed magnetic field coupled with DCT (MDCT) was studied [121,122]. It is known that deep cryogenic can promote the martensitic transformation from the retained austenite.…”

Section: Combined Applications Of Pmtmentioning

confidence: 99%

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Mechanism and application of mechanical property improvements in engineering materials by pulsed magnetic treatment: A review

Cai,

Qian,

Zhang

et al. 2024

Friction

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Pulsed magnetic treatment (PMT) has been adopted as an effective strengthening method for engineering materials and components in recent years, and the development of its application depends on the comprehensive understanding of the nature of PMT. The deep mechanism was thought initially to be the magnetostrictive effect, while further investigation found that the magnetic field could lead to the change of the defect states in the crystal, which is called the magnetoplastic effect. Due to the complexity of the engineering materials, manifestations of the magnetoplastic effect become more diverse, and they were reviewed in the form of microstructure homogenization and interfacial stabilization. Further, the mechanism of the magnetoplastic effect was discussed, focusing on the changes in the spin states under the external magnetic field. Microstructure modifications could also alter material performances, especially the residual stress, plasticity, and fatigue properties. Therefore, PMT with specific parameters can be utilized to obtain an ideal combination of microstructure, residual stress, and mechanical properties for better service performance of different mechanical parts, and its applications on machining tools and bearings are perfect examples. This work reviews the effect of PMT on the microstructure and properties of different materials and the mechanism, and it also summarizes the fundamental applications of PMT on essential mechanical parts.

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Section: Combined Applications Of Pmtmentioning

confidence: 94%

Section: Combined Applications Of Pmtmentioning

confidence: 99%

Mechanism and application of mechanical property improvements in engineering materials by pulsed magnetic treatment: A review

Cai,

Qian,

Zhang

et al. 2024

Friction

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bohan et al [8] investigated the effect of process parameters on the microstructure and yield strength of the metamorphic layer through grinding and crystal plasticity finite elements, and found that the grinding process parameters affect the microstructure and distribution of the metamorphic layer, thus changing its yield strength. Zheng et al [9] focused on the effect of deep cooling treatment on the microstructure of 8Cr4Mo4V bearing steel, and observed that deep cooling treatment helps to promote the transformation of residual austenite to martensite transformation. Through the above studies, it is clear that machining and heat treatment techniques have a significant impact on the microstructure and properties of bearing steel.…”

Section: Introductionmentioning

confidence: 99%

Mechanism and prediction of residual stress generation in ultrasonic vibration-assisted grinding of bearing steel

Zhang,

Luan,

Zhao

et al. 2024

Preprint

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The surface residual stress of the parts has an important influence on their performance. The generation mechanism of surface residual stress in ultrasonic vibration-assisted grinding (UVAG) of bearing steel was investigated, and the correlation between processing parameters and residual stresses was obtained. Based on the ultrasonic vibration-assisted grinding force and thermal model and the flow stress model considering the initial material microstructure, the mechanical and thermal stresses of the material were calculated. Finally, the theoretical model of residual stress is established based on the yield theory and experimentally verified. High-speed ultrasonic aerostatic spindle for ultrasonic vibration-assisted grinding, change the inlet pressure to realize the ultrasonic amplitude and frequency adjustment, the experimental results show that the cutting direction and the vertical cutting direction of the residual stress test results and the model prediction results of the average relative error of 11.4% and 11.7%, and the rule of change is more consistent. Based on the experimental results, the influence pattern of process parameters on the experimental results was analyzed. The results show that the residual compressive stress on the surface of ultrasonic vibration-assisted grinding is directly proportional to the grinding depth, feed rate, and inlet pressure of pneumatic ultrasonic wave, and inversely proportional to the linear speed of the grinding wheel. This study provides a theoretical basis for the analysis of UVAG residual stress and optimization of UVAG process parameters.

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“…The exceptional comprehensive performance includes factors such as a high strength at elevated temperature, high hardness, good wear resistance, excellent inherent anticorrosion resistance and extended fatigue life time [2][3][4]. As a promising bearing material, 8Cr4Mo4V steel has become increasingly popular and has been widely used in industrial and aerospace applications [5][6][7][8][9][10][11]. In recent years, with the rapid development of industrial and aerospace field, the more stringent requirements are put forward under the complex and harsh service environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Microstructure Evolution of 8Cr4Mo4V Steel under High-Dose-Rate Ion Implantation

Miao,

Zhang,

Guo

et al. 2023

Materials

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In this study, the effect of microstructure under various dose rates of plasma immersion ion implantation on 8Cr4Mo4V steel has been investigated for crystallite size, lattice strain and dislocation density. The phase composition and structure parameters including crystallite size, dislocation density and lattice strain have been investigated by X-ray diffraction (XRD) measurements and determined from Scherrer’s equation and three different Williamson–Hall (W-H) methods. The obtained results reveal that a refined crystallite size, enlarged microstrain and increased dislocation density can be obtained for the 8Cr4Mo4V steel treated by different dose rates of ion implantation. Compared to the crystallite size (15.95 nm), microstrain (5.69 × 10−3) and dislocation density (8.48 × 1015) of the dose rate of 2.60 × 1017 ions/cm2·h, the finest grain size, the largest microstrain and the highest dislocation density of implanted samples can be achieved when the dose rate rises to 5.18 × 1017 ions/cm2·h, the effect of refining is 26.13%, and the increment of microstrain and dislocation density are 26.3% and 45.6%, respectively. Moreover, the Williamson–Hall plots are fitted linearly by taking βcosθ along the y-axis and 4sinθ or 4sinθ/Yhkl or 4sinθ(2/Yhkl)1/2 along the x-axis. In all of the W-H graphs, it can be observed that some of the implanted samples present a negative and a positive slope; a negative and a positive slope in the plot indicate the presence of compressive and tensile strain in the material.

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Effect of pulsed magnetic field on retained austenite of quenched 8Cr4Mo4V steel under cryogenic condition

Cited by 8 publications

References 39 publications

Mechanism and application of mechanical property improvements in engineering materials by pulsed magnetic treatment: A review

Mechanism and application of mechanical property improvements in engineering materials by pulsed magnetic treatment: A review

Mechanism and prediction of residual stress generation in ultrasonic vibration-assisted grinding of bearing steel

Understanding the Microstructure Evolution of 8Cr4Mo4V Steel under High-Dose-Rate Ion Implantation

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