Nano-grained pure copper with high-strength and high-conductivity produced by equal channel angular rolling process

Habibi, Asiyeh; Ketabchi, Mostafa; Eskandarzadeh, Mohammad

doi:10.1016/j.jmatprotec.2011.01.009

Cited by 99 publications

(62 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thirdly, the hardness value of the sample ECAPed at 673 K has a slight increase with more passes. The reason might be that the materials reached the steady-state density of dislocation and dynamic recovery occurred in the grains of Cu-Mg alloy [18]. While the hardness value of the sample ECAPed at 473 K obviously increase after 16 passes.…”

Section: Methodsmentioning

confidence: 96%

Grain Refinement and High-Performance of Equal-Channel Angular Pressed Cu-Mg Alloy for Electrical Contact Wire

Zhu

Jiang

et al. 2014

Metals

View full text Add to dashboard Cite

Multi-pass equal-channel angular pressing (EACP) was applied to produce ultrafine-grained (UFG) Cu-0.2wt%Mg alloy contact wire with high mechanical/electric performance, aim to overcome the catenary barrier of high-speed trains by maximizing the tension and improving the power delivery. Microstructure evolution and overall properties of the Cu-Mg alloy after different severe-plastic-deformation (SPD) routes were investigated by microscopic observation, tensile and electric tests. The results show that the Cu-Mg alloy after multi-pass ECAP at 473 K obtains ultrafine grains, higher strength and desired conductivity. More passes of ECAP leads to finer grains and higher strength, but increasing ECAP temperature significantly lower the strength increment of the UFG alloy. Grain refinement via continuous SPD processing can endow the Cu-Mg alloy superior strength and good conductivity characteristics, which are advantageous to high-speed electrification railway systems.

show abstract

Section: Methodsmentioning

confidence: 96%

Grain Refinement and High-Performance of Equal-Channel Angular Pressed Cu-Mg Alloy for Electrical Contact Wire

Zhu

Jiang

et al. 2014

Metals

View full text Add to dashboard Cite

show abstract

“…A set of copper properties and dimensions similar to that reported in [13] was used to prepare the ECARed copper. The ECAR device used in this study is illustrated in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Fatigue behavior of nano-grained pure copper processed by equal channel angular rolling

Habibi¹,

Ketabchi²,

Eskandarzadeh³

2017

Scientia Iranica

Self Cite

View full text Add to dashboard Cite

Abstract. The equal channel angular rolling process was successfully performed on commercial pure copper. After 4 passes of this process, grains with a diameter of about 70-500 nm were formed. The fatigue test results showed that the ultra-ne grained copper represents a longer lifetime under stress-controlled fatigue. To clarify the formation process of surface damage, morphological changes in the fractured surface were monitored by scanning electron microscopy.

show abstract

“…Even, some authors have been describing a deformation mechanism in UFG materials through the study of material properties [17,18,27]. It is suggested that grain boundaries are to be the main sites for vacancy storage probably in the form of voids or free volume [28].…”

Section: Introductionmentioning

confidence: 99%

Relation between microstructural features and mechanical properties in oxygen free high conductivity copper after Equal-Channel Angular Pressing

KVACKAJ¹,

KOVÁČOVÁ²,

KOČIŠKO³

et al. 2021

View full text Add to dashboard Cite

An oxygen free high conductivity (OFHC) copper was subjected to maximum 13 ECAP passes to achieve a sufficiently high degree of deformation. Strength properties (yield stress and ultimate tensile strength) show obvious increase up to the 4 th pass. In the 6 th ECAP pass, the yield stress and ultimate tensile strength are stabilized at a maximum of 449 MPa. Microstructure studies showed that the 1 st ECAP pass caused a significant increase of dislocation density. These dislocations are arranged in cells, forming dense dislocation walls at low-angle subgrains. After the 5 th ECAP pass, well-defined equiaxed ultrafine grains of diameter approximately 500 nm had emerged forming high-angle grain boundaries. The defect density studies carried out by positron annihilation spectroscopy method revealed an increase in a defect density (vacancies, dislocations) up to the 4 th pass, consequently with number of ECAP passes increasing, decrease in defects density (seen by positrons) was observed.K e y w o r d s : dislocation, grain boundaries, equiaxed ultrafine grained microstructure, electron microscopy, Equal Channel Angular Pressing (ECAP)

show abstract

Nano-grained pure copper with high-strength and high-conductivity produced by equal channel angular rolling process

Cited by 99 publications

References 19 publications

Grain Refinement and High-Performance of Equal-Channel Angular Pressed Cu-Mg Alloy for Electrical Contact Wire

Grain Refinement and High-Performance of Equal-Channel Angular Pressed Cu-Mg Alloy for Electrical Contact Wire

Fatigue behavior of nano-grained pure copper processed by equal channel angular rolling

Relation between microstructural features and mechanical properties in oxygen free high conductivity copper after Equal-Channel Angular Pressing

Contact Info

Product

Resources

About