Mechanical properties improvement of pre-deformed Al–Zn–Mg–Cu alloys by electroshocking treatment based on the non-equilibrium scattering of electron-dislocation

Wei, Wu; Song, Yanli; Zhou, Pu; Yu, Yongqing; Xie, Lechun; Hua, Lin

doi:10.1016/j.jallcom.2020.157987

Cited by 15 publications

(3 citation statements)

References 28 publications

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“…Before EST, the values of mapping strain were ranged from −0.13 to 0.08. After EST, the values of strain were ranged from −0.05 to 0.05, which indicates the distribution of micro-strain become uniform.Previous studies have shown that the migration of dislocations could be promoted by EST, thus decrease the density of dislocations and lead the dislocations to pile up at the grain boundaries [17,18]. The decrease of lattice distortion can be attributed to the fact that EST activated the movement of dislocations and reduced dislocation entanglement, so as to make the micro-strain distribution more uniform.…”

Section: Resultsmentioning

confidence: 99%

Homogenization of residual stress in the raceway of cold rolled M50 bearing ring via electromagnetic shocking treatment

Qian

Liu²,

Wang³

et al. 2023

Mater. Res. Express

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The uneven residual stress caused by cold rolling on the raceway seriously affect the distortion and performance of bearing rings. Here, a novel strategy of electromagnetic shocking treatment (EST) was proposed to regulate the distribution of residual stress in the raceway of cold rolled M50 bearing ring. The results indicate that the distribution of residual stress and local micro-strain along the raceway of the cold rolled ring become more homogenized after EST, leading to the homogenization of hardness along the whole cross section. In addition, attributed to the “targeted” regulation effect of EST, the small angle grain boundaries and the texture also become uniform along the raceway.

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Section: Resultsmentioning

confidence: 99%

Homogenization of residual stress in the raceway of cold rolled M50 bearing ring via electromagnetic shocking treatment

Qian

Liu²,

Wang³

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…More interestingly, inverse Fourier transform images of different orientations could clearly be seen in Figure 4 , suggesting crystal distortions in the 0.9P-CNT sample. Specifically, the red symbol T in the figure indicates the defects present in the sample [ 42 ], and many symbols of T revealed that the as-prepared sample possessed a large number of surface defects.…”

Section: Resultsmentioning

confidence: 99%

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

Jia

Wei

et al. 2022

Nanomaterials

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P-doped graphitic carbon nitride tubes (P-CNTS) with different P concentrations were successfully fabricated via a pre-hydrothermal in combination with a calcination process under a nitrogen atmosphere. The as-prepared samples exhibited excellent photocatalytic performance with a hydrogen production rate (HPR) of 2749.3 μmol g−1 h−1, which was 17.5 and 6.6 times higher than that of the bulk graphitic carbon nitride (CNB) and graphitic carbon nitride tube (CNT). The structural and textural properties of the P-CNT samples were well-investigated via a series of characterization methods. Compared with the bulk g-C3N4, the tubular structure of the doped samples was provided with a larger specific surface area (SSA) and a relatively rough interior. Besides the above, surface defects were formed due to the doping, which could act as more active sites for the hydrogen production reaction. In addition, the introduction of the P element could effectively adjust the band-gap, strengthen the harvest of visible-light, and boost the effective separation of photogenerated charges. More interestingly, these findings can open up a novel prospect for the enhancement of the photocatalytic performance of the modified g-C3N4.

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“…The experimental procedure is shown in figure 2(a). It should be noted that the so-called electroshock treatment (EST) is a bit different from common EPT [23]. The current used in the EST has the characteristics of ultra-low frequency unidirectional positive pulse and very limited energy density (figure 2(b)), to minimize the temperature rise and effectively weaken the thermal effect by the current impact.…”

Section: Electroshock Assisted Uniaxial Tensile Testmentioning

confidence: 99%

Modeling dynamic recrystallization behavior of Al-Zn-Mg-Cu alloy during electroshock assisted tension based on cellular automata

Mei

Song

et al. 2022

Mater. Res. Express

Self Cite

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Electroshock assisted forming of high-strength aluminum alloy is a new type of plasticizing manufacturing method. To study the dynamic recrystallization (DRX) behavior of Al-Zn-Mg-Cu alloy during low-frequency electroshock assisted tension, a cellular automata (CA) model coupled electro-thermal-mechanical multi-field effect was proposed on the Matlab platform. In the established CA model, the effect of additional driving force generated by the electric pulse on the dynamic recrystallization nucleation and growth has been innovatively taken into account. The grain diameters obtained by the above CA model are consistent with that obtained by the electron back scatter diffraction (EBSD) tests, which verified the accuracy of the model. The effects of current density and electrical pulse period on grain morphology, average grain diameter, DRX fraction, and grain size distribution were analyzed. Additionally, the optimal parameters of electroshock assisted tensile (current density of 30 Amm-2, pulse period of 5 s) were predicted by the CA method. At this time, the DRX fraction increased to 45.79% and the fracture elongation of unidirectional tensile specimen increased by 21.74%.

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Mechanical properties improvement of pre-deformed Al–Zn–Mg–Cu alloys by electroshocking treatment based on the non-equilibrium scattering of electron-dislocation

Cited by 15 publications

References 28 publications

Homogenization of residual stress in the raceway of cold rolled M50 bearing ring via electromagnetic shocking treatment

Homogenization of residual stress in the raceway of cold rolled M50 bearing ring via electromagnetic shocking treatment

One-Dimensional P-Doped Graphitic Carbon Nitride Tube: Facile Synthesis, Effect of Doping Concentration, and Enhanced Mechanism for Photocatalytic Hydrogen Evolution

Modeling dynamic recrystallization behavior of Al-Zn-Mg-Cu alloy during electroshock assisted tension based on cellular automata

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