The Effects of Laser‐Assisted Ultrasonic Nanocrystal Surface Modification on the Microstructure and Mechanical Properties of 300M Steel

Zhao, Weidong; Liu, Daoxin; Li, Jun; Zhang, Xiaohua; Zhang, Hao; Zhang, Ruixia; Dong, Yalin; Ye, Chang

doi:10.1002/adem.202001203

Cited by 12 publications

(4 citation statements)

References 50 publications

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“…Based on Equations (4) and (5), the ϵ’ and σ of the USM treated surface are −0.00302 and 989.88 MPa, respectively. Consequently, the XRD results verify that the refined grains, plastic deformations, dense dislocations and compressive residual stresses have been introduced into the surface layer of the USM treated Cu–0.2Be–1.0Co alloy [40].…”

Section: Resultsmentioning

confidence: 97%

Microstructures and properties of ultrasonically surface-modified Cu–0.2Be–1.0Co alloy

Wang,

Zhang,

Hong

et al. 2023

Surface Engineering

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Low-Be copper alloys exhibit high thermal and electrical conductivities but weak strength, hardness, wear and corrosion resistances, which limit their practical applications severely. To overcome these defects, we herein systematically investigate the effects of ultrasonic surface modification on the microstructures and properties of Cu-0.2Be-1.0Co alloy. It is found that the gradient microstructures characterized by pile-ups and dents, fine grains, dense dislocations and compressive residual stresses are generated in the 171 μm thickness surface layer of the Cu-0.2Be-1.0Co alloy by ultrasonic surface modification. As a result, the surface hardness obtains a 162% enhancement, the wear rate drops from 5.03 × 10 −4 to 3.46 × 10 −4 mm 3 •N −1 •m −1 , and the electrochemical corrosion current density decreases from 3.24 to 1.92 μA/cm 2 . These results indicate that the comprehensive properties of Cu-0.2Be-1.0Co alloy can be simultaneously improved by utilizing ultrasonic surface modification.

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Section: Resultsmentioning

confidence: 97%

Microstructures and properties of ultrasonically surface-modified Cu–0.2Be–1.0Co alloy

Wang,

Zhang,

Hong

et al. 2023

Surface Engineering

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“…Using thermal energy to assist traditional strengthening technologies could therefore allow the material workpiece to maintain a high working temperature and a high-strain-rate plastic deformation. [144] Based on the above thermomechanical phenomena, scientists have developed many novel thermal-assisted surface mechanical strengthening methods, such as warm SP (WSP), [146][147][148] warm LSP (WLSP), [149][150][151] electropulsing-assisted LSP (EP-LSP), [152] electropulsing-assisted UP (EP-UP), [153] direct current-assisted USRP (DC-USRP), [154] electropulsing-assisted USRP (EP-USRP), [155][156][157] high-temperature UNSM (HT-UNSM), [158][159][160] laser-assisted UNSM (LA-UNSM), [145,161] electrically-assisted UNSM (EA-UNSM), [162,163] and electropulsing-assisted UNSM (EP-UNSM). [164,165] These methods can provide a high and constant temperature for different thermal assistance and different strengthening effects.…”

Section: Challenges and Future Directionsmentioning

confidence: 99%

A Review of Low‐Plasticity Burnishing and Its Applications

Zhang

Yang

et al. 2022

Adv Eng Mater

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Low‐plasticity burnishing (LPB) has been widely used in various industries. In the LPB process, when the ball moves on the material surface, plastic deformation or cold working occurs in the burnished region. Through this process, not only can LPB improve the surface integrity of metallic material components by replacing polishing in some situations, but it can also improve fatigue performance thanks to the low work hardening and the beneficial compressive residual stress (CRS). So far, extensive research has demonstrated the influence of the LPB process on surface integrity and service performance of different metallic materials, such as titanium alloys, aluminum alloys, magnesium alloys, nickel‐based superalloys, stainless steels, and carbon steels. Recent years have witnessed many innovative LPB processes and novel applications. Herein, the working principle of the LPB process is first restated. Following that, how LPB strengthens the material surface and thereby influences the mechanical performance, including the surface quality, residual stress, microstructure, microhardness, fatigue, and wear performance, is reviewed. Furthermore, the difference of surface‐strengthening effect among LPB and other surface mechanical strengthening processes is compared. Finally, the current challenges to LPB are discussed and some suggestions on its development directions are put forward.

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“…However, at process time of 15 min, because of excessive dislocation accumulation, it acts as a barrier layer against further plastic deformation. 27 Thus, no more enhancement in values of surface hardness and compressive residual stress are achieved.…”

Section: Parametric Influencementioning

confidence: 99%

Corrosion resistance of 3D printed SS316L post-processed by ultrasonic shot peening at optimum energy level

Alharbi

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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The layer-upon-layer nature of production by additive manufacturing (AM) made surface treatment as mandatory post-processing for increasing the surface integrity and subsequent tribological properties. In the present work an experimental study was carried out to understand how the ultrasonic shot peening (USP) enhances the corrosion rate, surface compressive residual stress, surface roughness and hardness of stainless steel 316 manufactured by selective laser melting (SLM). In order to do so, series of USP experiments carried out based on full factorial design taking into account the effects of ultrasonic power, processing time, and ball diameters on foresaid responses. Multi-objective optimization of process using desirability approach function was performed to obtain a process window including trade-off between energy consumption and sample’s quality characteristics. The optimization results revealed that it is not possible to have minimum energy and the best product’s quality at same time. In other word, to fabricate samples with best quality characteristics, more energy needs to be consumed. The optimum sample was selected through the trade-off graph based on the transition point where after this point the energy consumption dramatically increases but no further improvement in product’s quality characteristics are attained. By identifying the optimum sample, series of surface integrity examination tests were carried out to show the efficiency of USP on enhancement the surface integrity and corrosion properties of AM material. It was found that the sample processed by USP at optimum parameter setting by ultrasonic power of 60%, process time of 15 min, and ball diameter of 6 mm is an optimum process setting that meets the condition described for transition point and causes 120% improvement in corrosion rate.

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The Effects of Laser‐Assisted Ultrasonic Nanocrystal Surface Modification on the Microstructure and Mechanical Properties of 300M Steel

Cited by 12 publications

References 50 publications

Microstructures and properties of ultrasonically surface-modified Cu–0.2Be–1.0Co alloy

Microstructures and properties of ultrasonically surface-modified Cu–0.2Be–1.0Co alloy

A Review of Low‐Plasticity Burnishing and Its Applications

Corrosion resistance of 3D printed SS316L post-processed by ultrasonic shot peening at optimum energy level

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