Deformation processing and strength/conductivity properties of Cu–Fe–Ag microcomposites

Microstructure and properties of Cu–11Fe–6Ag in situ composite after thermo-mechanical treatments

“…As a result strength of the composite dropped greatly even with much higher iron content. Song et al [18] revealed that Cu-9Fe-1.2Ag had a strength/conductivity combination of 939 MPa/56.2% IACS after three intermediate heat treatment at 450 • C for 1 h, which indicates that the heat treatment used is not very suitable. Strength and conductivity of Cu-11Fe-6Ag at η = 7.6 reach 1140 MPa and 68.8% IACS, and 1260 MPa/63.8% IACS at η = 8.3 and 1500 MPa/53% IACS at η = 9.2, which are the best combination reported for Cu-Fe system in situ composites to date.…”

“…Adding a third element to the binary Cu-Fe system allows exploiting a larger variety of possible kinetic paths for attaining a certain flow stress-conductivity. Due to similar electronic structure, crystal structure and electronegativity with copper plus higher conductivity, Ag has been chosen as the third element in many researches [14][15][16][17][18][19]. Ebrahimi et al [15] found that the incorporation of Ag as solid solution into electrodeposited copper increased strength by reducing the grain size from 251 to 126 nm.…”

“…Raabe and Mattissen [17] pointed out that strength of Cu-4 wt.% Nb-8.2 wt.% Ag exceeds that of Cu-20 wt.% Nb at η close to 8. Song et al [14,18] reported that presence of Ag could refine the Fe dendrites of the as-cast ingots and Cu-9Fe-1.2Ag had a strength/conductivity combination of 939 MPa/56.2% IACS after three thermal-mechanical treatment at 450 • C for 1 h. Our previous research [19,20] revealed that addition of Ag could deduce the maximum solubility of Fe in Cu at high temperature, and that conductivity of the as-drawn composite with 6 wt.% Ag is about 6-10% IACS higher than those with 1-3% Ag and that deformed Cu-11 wt.% Fe-6 wt.% Ag wires with total η = 4.1 acquire better Vickers hardness/conductivity combination of HV200/62% IACS after being aged at 475 • C for 1 h. It is obvious that the amount of Ag added and the heat treatment process used contribute much to the properties of the composite. The present work is a study directed at investigating the role of Ag on the conductivity of Cu-Fe in situ composites and further improving the strength and conductivity of Cu-Fe-Ag in situ composite through thermal-mechanical treatments, hence only composite Cu-11 wt.% Fe-6 wt.% Ag was selected as research material and Cu-12 wt.% Fe for comparison purpose.…”

Development of regimes for diffusion welding in order to obtain bimetallic copper-clad blanks for metallurgical purposes

“…Существует достаточно много способов получения слоистых металлических материалов [3][4][5][6][7][8][9][10][11][12][13][14][15][16] и одним из основных является сварка взрывом, при которой движение слоев соединяемых металлов вызывается направленным взрывом, сообщающим свариваемому элементу большую скорость, а соединение металлов происходит за счет нагрева и последующей пластической деформации их контактных поверхностей.…”

Thermal Stability and Properties of Deformation-Processed Cu-Fe In Situ Composites

“…One approach is to modify the composition, particularly using extra alloying elements. [14][15][16] Ag has been used as a third element in many studies, [17][18][19][20][21][22][23] because the electronegativity, electronic structure, and crystal structure of Ag are similar to those of Cu and the electrical conductivity of Ag is higher than that of Cu. The other approach is to modify the processing using various heat treatments.…”