Structure and properties of copper after large strain deformation

Abstract

Structure and properties of Cu in dependence on strain (from ε ∼ 0.9 to ε ∼ 15) during multi‐axial compression processing at room temperature was investigated. The evolution of dislocation structure, misorientation distribution and crystallite size were observed by using transmission electron microscopy (TEM) and scanning electron microscopy (SEM) equipment with electron back scattered diffraction (EBSD) facility. The mechanical properties of yield strength (YS), ultimate tensile strength (UTS) and uniform elongation was performed on MTS QTest/10 machine equipped with digital image correlation method (DIC).The structure–flow stress relationship of multi‐axial compression processing material at strains ε ∼ 3.5 and ε ∼ 5.5 is discussed. It is found that processing does not produce any drastic changes in deformation structure and the microstructural refinement is slow. These results indicate that dynamic recrystallization plays an important role during multi‐axial compression process in this range of deformation (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Deformation Microstructures in Metallic Materials after Severe Plastic Deformation by Rolling with Cyclic Movement of Rolls

“…Obtained results are in accordance with literature [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Enhanced mobility of dislocations in Al and Cu due to the lack of alloying elements to hinder the dislocation movement results in weakening of grain refinement.…”

“…The second group of non-ferrous materials, which play a key role in electric engineering are copper and copper alloys. In literature the effectiveness of SPD methods has been revealed for a pure Al [7][8][9][10][11][12][13], Al-Mg alloys [13,14], pure Cu [11,[13][14][15][16][17][18][19] and Cu-Fe [20] alloys. Recent works have demonstrated [21,22] that one of the method which can be used for SPD processing is rolling with cyclic movements of rolls (RCMR).…”

Cu-Cr and Cu-Fe Alloys Processed by New Severe Plastic Deformation: Microstructure and Properties

“…The combination of these methods in a single deformation procedure enables the optimization of the microstructure and mechanical properties. COT investigations were performed for Cu and Al [14][15][16][17][18][19] and this method was recognized as an effective tool for obtaining ultrafine grains/subgrains with a mixture of low-and high-angle grain boundaries.…”

Microstructure characterization of ultrafine grained Cu alloys processed by methods with cyclic scheme of deformation

“…The SPD processing at relatively low temperatures produces a hierarchy of dislocation structures with high dislocation density in boundaries [40,41]. It is known that in SPD deformed materials, dislocation density initially increases with an increase of deformation [42,43]. With further increase of deformation the saturation in dislocation density is reached, and this condition is considered as the equilibrium between dynamic recovery and formation of dislocations [44,45].…”