High performance of mechanical and electrical properties of Cu-Cr-Zr alloy sheets produced by ARB process and additional thermo-mechanical treatment

Microstructure and Properties of Fine Grained Cu-Cr-Zr Alloys after Termo-Mechanical Treatments

“…The experimental results including the data of different researches on the strain and alloying dependence of the strength for Cu-Cr-Zr alloys is shown in Fig. 6 [14,21,[23][24][25][26]38,47,[50][51][52][53][54][55][60][61][62]69,72,74,[96][97][131][132][133][134][135][136][137][138]. An increase of alloying is accompanied by the strengthening in all concentration range.…”

“…The effect of different termo-mechanical treatments, deformation methods, deformation temperatures on UTS and elongation to failure, , of Cu-Cr-Zr alloys is shown in Fig. 8 [14,21,[23][24][25][26]38,47,[50][51][52][53][54]57,[60][61][62]69,72,74,96,97,118,[133][134][135][136][137][138][139]. It clearly seen that the plastic deformation leads to a decrease in plasticity from 30-70% in the solution treated/ aged condition to 0.5-20%.…”

“…The aging of deformed material increases the elongation to 10-25% that can be associated with recovery or recrystallization [69,140]. The worst plasticity is observed after cold rolling and similar treatments that can be associated with the lamellar microstructure development [21,26,96,[136][137]. In contrast, ECAP and high pressure torsion (HPT) result in almost equiaxed UFG microstructure, providing reasonable elongation [21].…”

Deformation microstructures, strengthening mechanisms, and electrical conductivity in a Cu–Cr–Zr alloy

“…The most promising processing methods, which allow us the fabrication of advanced Cu alloys with improved mechanical properties, involve severe plastic deformations [9][10][11][12][13][14][15][16][17]. It should be noted that the significant strengthening through intense plastic straining is not accompanied by a remarkable degradation of electrical conductivity [11][12][13]16,17]. The most impressive strength results have been obtained using high pressure torsion [13,16,17], although this specific technique is currently used only for laboratory simulations.…”

“…The dispersion strengthening associated with nanoscale Cr or Heusler phase (CrCu 2 Zr) particles [5] may also contribute to the overall YS. A usage of appropriate aging treatment can provide an additional strength increment of about 10-20% [12]. The nanoscale precipitates dispersed in ultrafine-grains significantly enhance strain hardening, resulting in simultaneous improvement of strength and plasticity of Cu-Cr-Zr alloys [11].…”