Magnetic induced re-dissolution and microstructure modifications on mechanical properties of Cr4Mo4V steel subjected to pulsed magnetic treatment

Qian, Chengkai; Li, Kejian; Rui, Shao-Shi; Mingdon, Hou; Zhang, Xu; Wu, Yingpeng; Cai, Zhipeng

doi:10.1016/j.jallcom.2021.160471

Cited by 16 publications

(6 citation statements)

References 54 publications

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“…Most of CSL boundaries are biased from the exact misorientation angle, which results from the linear defects at grain boundaries [47], and the unique property of CSL boundaries will decay with the deviation angle. Changes in the local KAM value are evident in KAM maps before and after PMT, especially at grain boundaries, which indicates that the dislocation motion occurs [43,48]. In addition, the average deviation angle of different CSL boundaries decreased, as shown in Fig.…”

Section: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 98%

“…As a result, the lattice distortion rate increases in these areas that the carbon atoms dissolve in, and it was proved by a general decrease in the IQ value after PMT. Besides, the diffraction angle of the (220) Fe face in the X-ray diffraction (XRD) patterns decreased by 0.2° after PMT, corresponding to a larger interplanar distance and a higher lattice distortion rate based on the Bragg Equation [43].…”

Section: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 99%

“…CSL boundaries are more stable than random boundaries as they possess lower interfacial misfits and can offer a more substantial barrier for dislocation transmission under external load. In order to explain the GBCD changes after PMT, further study was carried out on the M50 bearing steel [43]. It was found that the average misorientation angle of low-angle boundaries generally decreased after PMT, while the fraction of CSL boundaries of ferrite, especially the Σ3, Σ9, and Σ11 CSL boundaries, increased (Figs.…”

Section: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 99%

See 2 more Smart Citations

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: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 98%

Section: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 99%

Section: Comprehensive Effect Of Pmt On Microstructurementioning

confidence: 99%

See 1 more Smart Citation

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

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“…According to AMS 6491, it is similar to the M50 bearing steel. They are widely used in aerospace bearing manufacturing [35]. The specimens were prepared by turning with threads at both ends and then grinding the surface of the test section to reduce the roughness.…”

Section: Sample Preparationmentioning

confidence: 99%

Investigation of the Flow Stress Model for Cr4Mo4V Bearing Steel under Ultrasonic Vibration Conditions

Luan,

Zhao,

Mao

et al. 2024

Metals

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To investigate the mechanisms behind the effect of ultrasonic vibration on the plastic deformation of materials, the flow stress model of Cr4Mo4V was established according to the dislocation dynamics and thermal activation theory, which considers the effect of dislocation density evolution on plastic deformation under ultrasonic vibration conditions. The effect of amplitude and strain rate on the flow stress was analyzed by fitting the stress-strain data obtained from an ultrasonic vibration-assisted tensile (UVAT) single-factor test. To investigate the influence of strain rate and vibration duration on the acoustic effect, comparative tests with and without vibration were performed for various strain rates. The results showed that the flow stress decreased significantly in the tensile test with ultrasound compared to the test without ultrasound, and the degree of reduction increased with increasing amplitude. In addition, the nonlinear relationship between the acoustic softening effect and the strain rate was analyzed. The result demonstrates that the dislocation density absorbs the ultrasonic vibration energy, which results in slip and proliferation. Macroscopically, due to a greater susceptibility to plastic deformation, the dislocation density shows residual hardening at the end of the ultrasound. Finally, the average absolute relative error (AARE) between predicted flow stresses and experimental results under three ultrasonic conditions using the developed model were 4.49%, 1.27%, and 5.64%, which proved the validity of the model.

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“…In the Orovan bypass mechanism, the dislocation line can bend along the particle boundary and increase the line tension due to the restraint of second-phase particles, so a larger driving force is required for the dislocation to bypass the particle. It increases the deformation resistance of the material, and the approximate relationship between its strength increment and the particle size 𝑑 and volume fraction 𝑓 of the second phase is as follows [45]:…”

Section: Precipitation Strengthening Effect Of Electromagnetic Couplingmentioning

confidence: 99%

Influence of Novel Electromagnetic Strengthening on Mechanical Properties of Spaceborne Elastic Components

Xiong

Xiao²,

Gao³

et al. 2023

J. Phys.: Conf. Ser.

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Numerous elastic components are widely used in the power drive, vibration control, and pressure compensation of deployable antennas. Thus, the deployment and normal service of the antenna rely on the consistency and stability of their mechanical properties. They offer important support for deployable antenna products to meet the requirements of shape and surface accuracy. This study found that the electromagnetic field can improve the stiffness, hardness, and stability of the space-borne spring. In this experiment, the hardness variance distribution is reduced by 40.79%, the creep resistance is improved by 45.76% to 61.48%, and fatigue life is increased by 69%. With the enhancement of mechanical properties, the uniformity, consistency, and individual differences of the spring are improved. According to the observations of metallographic microstructure, fine grain strengthening and precipitation strengthening mainly contribute to the reinforcing effect. It is found that the electromagnetic field has an important influence on improving the performance stability and consistency of the space-borne elastic element structure, and this technology has great prospects in the future aerospace field.

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Magnetic induced re-dissolution and microstructure modifications on mechanical properties of Cr4Mo4V steel subjected to pulsed magnetic treatment

Cited by 16 publications

References 54 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

Investigation of the Flow Stress Model for Cr4Mo4V Bearing Steel under Ultrasonic Vibration Conditions

Influence of Novel Electromagnetic Strengthening on Mechanical Properties of Spaceborne Elastic Components

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