Effect of electric current direction on the microstructural evolution and mechanical properties of a cold-rolled Cu–Zn alloy during the phase transformation induced by electric current pulses

2015 ◽  
Vol 30 (16) ◽  
pp. 2500-2507 ◽  
Author(s):  
Xinli Wang ◽  
Meishuai Liu ◽  
Wenbin Dai ◽  
Nan Wu ◽  
Xiang Zhao
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Electric Current ◽  
Microstructural Evolution ◽  
Current Direction ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Cold Rolled ◽  
Image Position ◽  
Zn Alloy

Abstract

Enhanced phase transformation and variant selection by electric current pulses in a Cu–Zn alloy

2014 ◽  
Vol 29 (8) ◽  
pp. 975-980 ◽  
Author(s):  
Xinli Wang ◽  
Wenbin Dai ◽  
Rui Wang ◽  
Xinzhong Tian ◽  
Xiang Zhao
Keyword(s):  
Phase Transformation ◽  
Electric Current ◽  
Variant Selection ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Image Position ◽  
Zn Alloy

Abstract

Texture and Microstructural Evolution under Electric Current Pulses in a Fe-3%Si Steel

2011 ◽  
Vol 197-198 ◽  
pp. 1104-1108 ◽  
Author(s):  
Xin Li Wang ◽  
Hong Ming Zhao ◽  
Wen Bin Dai ◽  
Xiang Zhao
Keyword(s):  
Electric Current ◽  
Microstructural Evolution ◽  
Current Density ◽  
High Current Density ◽  
Current Direction ◽  
Direction Parallel ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Current Densities ◽  
Cold Rolled

The evolution of the recrystallization texture under high current density electric current pulses (ECP) was investigated in a cold-rolled Fe-3%Si steel sheet. Results showed that the preferred nucleation always occurred in the direction parallel to the current direction at the primary stage of recrytallization. With the increment of the current density, the effect of current direction on texture and microstructural evolution was decreased. Due to the different texture component along the layer depth under different current densities, it was also found that the recrystallization nucleation was much easier to occur from the top surface.

Effect of Electric Current Direction on Texture Evolution in a Cold Rolled Fe-3%Si Steel under Electric Current Pulses Treatment

2012 ◽  
Vol 706-709 ◽  
pp. 2366-2371 ◽  
Author(s):  
Xin Li Wang ◽  
Hong Ming Zhao ◽  
Wen Bin Dai ◽  
Xiang Zhao
Keyword(s):  
Electric Current ◽  
Recrystallization Texture ◽  
Current Flow ◽  
Texture Evolution ◽  
Rolling Direction ◽  
Current Direction ◽  
Goss Texture ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Cold Rolled

The effect of electric current on the recrystallization texture evolution with the rolling direction both parallel and perpendicular to the current flow during electric current pulses (ECP) treatment was investigated. The results showed that the exerted current direction played a great role on the formation of recrystallization texture {111}<112> and Goss texture {011}<100> at the primary stage of recrytallization induced by ECP treatment. However, with the current density increasing, the effect of current direction on texture evolution almost could be ignored and the final texture components in the two cases all are Goss texture.

scholarly journals Formation of Nanotwins in Cold-Rolled Cu-Zn Alloy by Electric Current Pulses

2011 ◽  
Vol 52 (11) ◽  
pp. 2022-2026 ◽  
Author(s):  
Wenbin Dai ◽  
Xinli Wang ◽  
Lin Zhao ◽  
Jingkun Yu
Keyword(s):  
Electric Current ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Cold Rolled ◽  
Zn Alloy

β‘ Phase Precipitation in a Cold Rolled Cu-Zn Alloy under Electric Current Pulses

2011 ◽  
Vol 197-198 ◽  
pp. 692-695 ◽  
Author(s):  
Xin Li Wang ◽  
Wen Bin Dai ◽  
Yan Lu ◽  
Shi Yang He ◽  
Xiang Zhao
Keyword(s):  
Electric Current ◽  
Rolling Direction ◽  
High Density ◽  
Phase Precipitation ◽  
Β Phase ◽  
Current Pulses ◽  
Α Phase ◽  
Electric Current Pulses ◽  
Cold Rolled ◽  
Zn Alloy

β' phase precipitation in a cold rolled Cu-Zn alloy under high density electric current pulses was studied in the present work. The results showed that the precipitation of β' phase was controlled by the angle between the current direction and rolling direction. When the angle was 45º, the application of electric current could refine α phase without β' phase precipitation, while at 0º or 90º, β' phase precipitated from α phase boundaries and distributed along the rolled direction. It was proposed that the precipitation of β' phase during the application of high density electric current was determined by the electron wind force and anisotropic electrical resistivity of the grain boundaries.

Effect of electric current pulse type on springback, microstructure, texture, and mechanical properties during V-bending of AA2024 aluminum alloy

2020 ◽  
pp. 1-36
Author(s):  
Nafiseh Mohammadtabar ◽  
Mohammad Bakhshi-jooybari ◽  
Hamid Gorji ◽  
Roohollah Jamaati ◽  
Jerzy A. Szpunar
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Electric Current ◽  
Current Pulse ◽  
Fiber Texture ◽  
Electric Current Pulse ◽  
Electric Pulses ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Pulse Type

Abstract The present work focused on the effect of the electric current pulse type on the springback, microstructure, texture, and mechanical properties during the V-bending process of AA2024 aluminum alloy. In order to investigate this effect, three different forming conditions including conventional V-bending and electrically assisted V-bending with square and sinusoidal pulses were considered. The results indicated that the amount of springback significantly decreased from 45.5° (for the sample formed via conventional V-bending) to 24° by applying the sinusoidal pulse. Microstructural observations revealed lower stored energy in the samples formed by electric current pulses which resulted in larger grain size compared to the samples formed without electric pulses. In addition, the result showed that the intensity of the (111)||BLD (bend line direction) fiber texture reduced after applying electric current pulses whereas it was very strong in the sample formed without electric pulses. It was suggested that the electric current pulses led to change the slip plane of the dislocations from {111} to {110} through cross slip. The applying electric current pulses decrease the ultimate tensile strength (UTS) from 471.1 MPa (for the conventional tensile test) to 448.0 and 426.7 MPa for the square and sinusoidal pulses, respectively. On the other hand, the electric pulses improved the formability of the AA2024 alloy owing to the activation of more slip systems, inhibition of dislocation pinning, the promotion of dislocation movement, and the acceleration of restoration mechanisms.

Oriented nanotwins induced by electric current pulses in Cu–Zn alloy

2007 ◽  
Vol 91 (16) ◽  
pp. 163112 ◽  
Author(s):  
X. L. Wang ◽  
Y. B. Wang ◽  
Y. M. Wang ◽  
B. Q. Wang ◽  
J. D. Guo
Keyword(s):  
Electric Current ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Zn Alloy

Influence of Electric Current Pulses on the Microstructure and Mechanical Properties of X70 Pipeline Steel

2011 ◽  
Vol 391-392 ◽  
pp. 535-539 ◽  
Author(s):  
Wen Bin Dai ◽  
Xin Li Wang ◽  
Li Li Chen ◽  
Lin Zhao ◽  
Jing Kun Yu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electric Current ◽  
Pipeline Steel ◽  
Elongation Rate ◽  
Electric Current Pulse ◽  
X70 Pipeline Steel ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Current Densities

The effect of high electric current pulse on the microstructure and macroscopic mechanical behavior of X70 pipeline steel was studied. With the increasing of current density, the grains become refined and the tensile strength has an evident improvement without a decrease in elongation rate. The theoretical analysis shows that two kinds of refinement mechanisms, recrystallization and phase transformation, compete when the exerted current densities differ. Therefore, the ECP treatment should provide a promising method to refine materials and to improve their physical properties by using different current densities.

Segregation of lead in Cu–Zn alloy under electric current pulses

2006 ◽  
Vol 89 (6) ◽  
pp. 061910 ◽  
Author(s):  
X. L. Wang ◽  
J. D. Guo ◽  
Y. M. Wang ◽  
X. Y. Wu ◽  
B. Q. Wang
Keyword(s):  
Electric Current ◽  
Current Pulses ◽  
Electric Current Pulses ◽  
Zn Alloy
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