Rapid hardening of AISI 4340 steel induced by electropulsing treatment

Ben, D.D.; Yang, H.J.; Ma, Yingche; Shao, X.H.; Pang, J.C.; Zhang, Z.F.

doi:10.1016/j.msea.2018.04.013

Cited by 32 publications

(11 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies 22,23 have shown that the EPT can lead to the dissolution of second-phase below the thermodynamic dissolution temperature within a very short time. Due to the thermal effect of EPT, the real temperature of the treated specimens may have approached or exceeded the critical thermodynamic dissolution temperature.…”

Section: Discussionmentioning

confidence: 94%

“…Meanwhile, it should be noted that the detour effect 30 of electric current results in a higher joule heating adjacent to voids and the tip region of carbide than the overall estimated temperature (532 °C), which will lead the local temperature of carbides to be close to the thermodynamic dissolution temperature. Since the thermodynamic dissolution temperature of Cr-rich carbides is lowest 23 , the partial dissolution and refinement could be easier to achieve. Conclusively, according to the chemical composition and morphology observation of the refined carbides, it can be inferred that the Cr-rich carbide with a higher surface to volume ratio could be partially dissolved and refined by EPT (especially at the tip region of the deformed Cr-rich carbide).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Voids healing and carbide refinement of cold rolled M50 bearing steel by electropulsing treatment

Wang

Qian

Hua

et al. 2019

Sci Rep

View full text Add to dashboard Cite

The voids caused by the cold rolling (CR) quite deteriorates the final performance of M50 bearing steel. In this work, the effect of electropulsing treatment (EPT) on the voids has been investigated, finding that the nano-size voids around carbides have been extensively healed. Moreover, it is interesting to find that the Cr-rich carbides are partially dissolved and consequently refined by EPT, which could be attributed to the decreased thermodynamic dissolution barriers and accelerated kinetic diffusion of carbon atoms towards dislocation. These results inspire people to develop a novel strategy (CR + EPT) to fully take advantage of CR and tailor the carbides size in bearing steels.

show abstract

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Voids healing and carbide refinement of cold rolled M50 bearing steel by electropulsing treatment

Wang

Qian

Hua

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…28) (4) Phase transformation. [30][31][32] Zhu et al studied electropulsing-treated (EPT) ZA22 alloy wire, and two stages of phase transformation were detected, in which the applied electropulsing accelerated phase transformation tremendously. 32) Therefore, the idea to optimize the mold flux crystallization to achieve a more homogenized heat transfer behavior, as well as solidification structure of the initial solidified shell during the continuous casting process with EPT, is of great importance to be conducted.…”

Section: (Received On August 4 2018; Accepted On November 2 2018)mentioning

confidence: 99%

Influence of Electropulsing Treatment on the Solidification and Heat Transfer Behavior of Mold Flux

et al. 2019

View full text Add to dashboard Cite

“…EPTs have been shown to influence mechanical and microstructure properties of different metallic alloys [27]. Ben et al were able to rapidly harden AISI 4340 steel due to a combined effect of dislocations, solid solution strengthening and nano twinned martensite thanks to EPT [28]. Guan and Tang observed an evolution of the texture in cold rolled AZ31 magnesium alloy and a grain refinement after EPT [29].…”

Section: Introductionmentioning

confidence: 99%

Influence of Electropulsing Treatments on Mechanical Properties of UNS S32750 Duplex Stainless Steel

et al. 2020

View full text Add to dashboard Cite

Prestrained at 5% and 15% duplex stainless steel UNS S32750 specimens have been subjected to electropulsing treatments with current density of 100 A/mm2 and 200 A/mm2 and 100 and 500 pulses for each current density value. Corrosion tests, X-ray diffraction, microhardness and residual stresses were collected before and after the electropulsing treatments. Tensile tests were performed after the electropulsing treatments in order to compare the mechanical response to reference tensile tests performed before pulsing treatments. Increase in fracture strain was observed after pulsing treatment in comparison to the reference tensile tests. A decrease in microhardness was also observed after electropulsing treatments for both degrees of prestrain. Electropulsing treatment almost eliminates the work-hardened state in the 5% prestrained specimens while partially recovered the 15% prestrained material increasing both uniform and fracture strain. Bulk temperature of the samples remained the same for all treatments duration. The effect are to be addressed to a combined effect of increase in atomic flux due to the electrical current and local joule heating in correspondence of crystal defects. Electropulsing treatment applied to metallic alloys is a promising technique to reduce the work hardening state without the need of annealing treatments in a dedicated furnace.

show abstract

Rapid hardening of AISI 4340 steel induced by electropulsing treatment

Cited by 32 publications

References 43 publications

Voids healing and carbide refinement of cold rolled M50 bearing steel by electropulsing treatment

Voids healing and carbide refinement of cold rolled M50 bearing steel by electropulsing treatment

Influence of Electropulsing Treatment on the Solidification and Heat Transfer Behavior of Mold Flux

Influence of Electropulsing Treatments on Mechanical Properties of UNS S32750 Duplex Stainless Steel

Contact Info

Product

Resources

About