Electric current induced precipitation in maraging steel

Kapoor, R.; S, Sunil Kumar; Reddy, G. Bharat; Nagaraju, S.; Kolge, Tanmay; Sarkar, Sudip Kumar; Sarita, .; Biswas, Aniruddha; Sharma, Archana

doi:10.1016/j.scriptamat.2018.05.013

Cited by 44 publications

(10 citation statements)

References 40 publications

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“…Another necessary condition to form plenty of sub-grains in S + EA sample is that there should be more new dislocations during electro-pulsing treatment. Also, it was reported that under the electric wind, not only the formation of sub-grain was promoted, but also the dislocation density was enhanced [22]. Consequently, the quantitative calculation of dislocation density is needed.…”

Section: Resultsmentioning

confidence: 99%

Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Wang¹,

Zhao²,

Xu³

et al. 2019

Materials

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Most methods used for strengthening metallic materials, such as thermal-mechanical treatment, will sacrifice the ductility. A novel technology, electric pulsing treatment (EPT), is applied to break this trade-off, which produces an Al–Mg–Si alloy with superior ductility and higher strength within only 560 ms. Systematic electron microscopy characterization and finite element simulation reveal that EPT promotes the formation of clusters Mg2(Si,Cu)3 and sub-grain boundaries. The results of quantitative calculation indicate that the dislocation entanglement is delayed due to the existence of clusters and longer dislocation glide distance, so that ultimate strength is fully improved. Moreover, the superior ductility is mainly governed by sub-grains which lead to higher mobile dislocation density, appearance of new crystal orientations, and prevention of crack propagation. Thereupon, this interesting finding paves the way in developing the Al–Mg–Si alloy with higher mechanical properties efficiently.

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Section: Resultsmentioning

confidence: 99%

Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Wang¹,

Zhao²,

Xu³

et al. 2019

Materials

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“…The wear resistance and the corrosion behaviour in deep cryogenically treated steels have been modified due to the accelerated diffusivity of the carbon in the formation and the configuration of carbides [51]. The electric effect on precipitation has been reported in various alloys [52,53].…”

Section: Electric Effect On Temperingmentioning

confidence: 99%

“…This can be used to control the formation and the morphology of the phases and the precipitates [62]. The effect of the electric current on the precipitations has been reported to be either an acceleration [52] or a retardation [63,64]. Both cases should have identical thermodynamic reasons, and the differences should come from the electrical and magnetic properties of the precipitates and the matrix.…”

Section: Optimising the Electric Effect In Eawmentioning

confidence: 99%

Critical Assessment of the Electric Effect in Electric Arc Welding

Qin

2021

Metals

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This work provides a critical assessment of electric effects on the microstructure evolution at the heat-affected zone in electric arc welding. Electric effects are the interactions between electromagnetic fields and materials’ microstructures. They differ from the arc effect and the Joule heating effect by providing an alternative contribution to nucleation, grain growth, recrystallisation and tempering. The influence of the electric effect on grain size, defects, anisotropic properties, precipitates and residual stress has been examined kinetically and thermodynamically. The use of adaptable electric current densities, pulse durations, pulse frequencies and electrode movements is suggested to achieve desirable microstructures and mechanical properties for the weldments.

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“…Electropulsing, which is an instantaneous high-energy input method with low energy consumption and high efficiency, is applied to promote and induce the microstructure evolution of metallic materials below the critical heat temperature. [23][24][25] For example, electropulsing can induce the precipitation of Ni 3 (Ti, Mo)-type intermetallic phase in maraging steels. 23) The recrystallization time of AZ31 magnesium alloy can be reduced by pulsed electric current; 24) electropulsing can also refine the microstructure of castings during the solidification process.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25] For example, electropulsing can induce the precipitation of Ni 3 (Ti, Mo)-type intermetallic phase in maraging steels. 23) The recrystallization time of AZ31 magnesium alloy can be reduced by pulsed electric current; 24) electropulsing can also refine the microstructure of castings during the solidification process. 25) Moreover, pulsed electric current can also improve the corrosion resistance of metallic materials.…”

Section: Introductionmentioning

confidence: 99%

Anti-corrosion Performance Regeneration in Aged Austenitic Stainless Steel by Precipitate Dissolution Below Critical Temperature Using Electropulsing

Cheng

Zhang

2020

ISIJ Int.

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Precipitates that form at high temperatures detrimentally affect the mechanical properties and corrosion resistance of engineering structural materials. Different from the typical solution treatment, a method that incorporates electropulsing is proposed in this study. Electropulsing is applied to aged 316LN austenitic stainless steel, which undergoes the aging process at 650°C for 2 000 h, microstructure characterization by SEM and TEM shows that electropulsing can aid in dissolving precipitates. Both the immersion and electrochemical tests showed a positive shift at corrosion potential and a decrease in the corrosion current density caused by electropulsing, and the corrosion resistance was improved. The change in the system's free energy caused by the difference in the electrical conductivity between precipitates and matrix results in precipitate dissolution. This finding provides a technical reference for engineering applications, i.e., the on-line repair of properties in aged steels.

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Electric current induced precipitation in maraging steel

Cited by 44 publications

References 40 publications

Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Critical Assessment of the Electric Effect in Electric Arc Welding

Anti-corrosion Performance Regeneration in Aged Austenitic Stainless Steel by Precipitate Dissolution Below Critical Temperature Using Electropulsing

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