Effect of electropulse on solid solution treatment of 6061 aluminum alloy

Zheng, Yuan; Tang, Guoyi; Kuang, J.; Zheng, Xiu-Peng

doi:10.1016/j.jallcom.2014.07.062

Cited by 58 publications

(21 citation statements)

References 20 publications

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“…The electropulsed sample consists of a microstructure with finer grain sizes. This phenomenon has been also observed and reported previously for several different systems of alloys [16,17]. The finer grain sizes is mainly due the higher nucleation rate caused by the electropulsing treatment during the recrystallization.…”

Section: Resultssupporting

confidence: 86%

Effect of electric current pulses on the microstructure and niobium carbide precipitates in a ferritic-pearlitic steel at an elevated temperature

Rahnama

Qin

2015

J. Mater. Res.

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Niobium is an important alloying element in steels. In the present work an effort has been made to investigate the effect of electropulsing on the niobium carbide (NbC) at an elevated temperature (800 ºC). The results show that the electropulsing treatment can generate an evenly distributed NbC by decreasing the kinetics barriers for precipitation. It has been also found that a semi-transformed pearlite structure forms in such a way that the grains are oriented towards a direction parallel to that of the electric current flow. Furthermore, the electropulsed sample benefits from refined grain size. This is thought to be due to the electropulse-enhanced nucleation rate. Tensile testing has been carried out in order to compare the properties of electropulsed sample with that of without electropulsing. The results show that the sample with treatment has greater yield strength and ultimate tensile stress (UTS) while its elongation is only 1% less that of the unelectropulsed samples. The improved mechanical properties of the sample with pulsing are attributed to its finer grain sizes as well as the elimination of precipitation free zones (PFZs) caused by the electropulsing treatment.

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Section: Resultssupporting

confidence: 86%

Effect of electric current pulses on the microstructure and niobium carbide precipitates in a ferritic-pearlitic steel at an elevated temperature

Rahnama

Qin

2015

J. Mater. Res.

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“…where µ 0 is the magnetic permeability in vacuum, g is a positive geometric factor for coarse grain materials, j is the current density, ∆V is the volume of the phase formed during transformation, and ξ(σ 1 , σ 2 ) is a factor depending on the electrical properties of the phases and can be defined as [29]:…”

Section: Effect Of Electropulsing On the Interlamellar Spacingmentioning

confidence: 99%

The effect of electropulsing on the interlamellar spacing and mechanical properties of a hot-rolled 0.14% carbon steel

Rahnama

Qin

2015

Materials Science and Engineering: A

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“…From the thermodynamic point of view, the Gibbs free energy associated with the recrystallization process, especially the nucleation rate of ferrite can be influenced by EPT [14][15][16][17][18][19][20][21][22][23][24][25][26]. According to classical nucleation theory, when EPT is applied, the nucleation rate for ferrite, can be expressed as [18,24,[37][38]:…”

Section: Thermodynamic Of Electric Currentmentioning

confidence: 99%

Stability of martensite with pulsed electric current in dual-phase steels

Qin

2016

Materials Science and Engineering: A

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Softening frequently occurs in dual-phase steels under isothermal tempering of martensite.Recently, non-isothermal tempering is implemented to decrease the softening process in dualphase steels. Here, we have discovered using high power electropulsing treatment can significantly enhance the strengthening effects via the formation of ultrafine-grained ferrite with nano-cementite particles in tempered martensitic-ferritic steels. To the best our knowledge, electropulsing treatment is a proper candidate to retard even to recovery the softening problems in the tempering of martensite in comparison with other isothermal and non-isothermal tempering methods.

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Effect of electropulse on solid solution treatment of 6061 aluminum alloy

Cited by 58 publications

References 20 publications

Effect of electric current pulses on the microstructure and niobium carbide precipitates in a ferritic-pearlitic steel at an elevated temperature

Effect of electric current pulses on the microstructure and niobium carbide precipitates in a ferritic-pearlitic steel at an elevated temperature

The effect of electropulsing on the interlamellar spacing and mechanical properties of a hot-rolled 0.14% carbon steel

Stability of martensite with pulsed electric current in dual-phase steels

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