TY - JOUR
T1 - Effect of Ag addition on the microstructure and mechanical properties of Cu-Cr alloy
AU - Xu, Sheng
AU - Fu, Huadong
AU - Wang, Yingtao
AU - Xie, Jianxin
N1 - Funding Information:
This work was supported by the National Key Research and Development Program of China (No. 2016YFB0301303 ), and the National Natural Science Foundation of China (No. 51504023 and U1602271 ).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/30
Y1 - 2018/5/30
N2 - Effect of Ag addition on the microstructure and mechanical properties of as-cast, cold-rolled and aging treated Cu-Cr alloys were investigated in this study. The results indicated that adding a small amount of Ag significantly improve the mechanical properties of the Cu-Cr alloys with little effect on electrical conductivity. Besides the solution strengthening mechanism of Ag, the distribution changes of Cr precipitates from the chain along grain and dendritic boundaries to homogeneously dispersed sphere in the as-cast Cu-Cr-Ag alloys, and more fibrous Cr precipitates obtained in the cold-rolled Cu-Cr-Ag alloys also played key roles in the performance improvement of the alloys. By intermediate frequency induction melting with non-vacuum melting condition, 1000 °C − 60 min solution treatment, 95% cold-rolling deformation, and 400 °C − 90 min aging treatment, the Cu-0.89Cr-0.44Ag alloy exhibited excellent mechanical-electrical properties with the tensile strength of 541.5 MPa and electrical conductivity of 83.2%IACS. Meanwhile, the Cu-0.94Cr-0.11Ag alloy showed a better cost performance (tensile strength*conductivity/raw material price per kg) about 800 MPa*%IACS/Yuan. These relevant results provided important references for research and development of the high-performance Cu-Cr-Ag alloy.
AB - Effect of Ag addition on the microstructure and mechanical properties of as-cast, cold-rolled and aging treated Cu-Cr alloys were investigated in this study. The results indicated that adding a small amount of Ag significantly improve the mechanical properties of the Cu-Cr alloys with little effect on electrical conductivity. Besides the solution strengthening mechanism of Ag, the distribution changes of Cr precipitates from the chain along grain and dendritic boundaries to homogeneously dispersed sphere in the as-cast Cu-Cr-Ag alloys, and more fibrous Cr precipitates obtained in the cold-rolled Cu-Cr-Ag alloys also played key roles in the performance improvement of the alloys. By intermediate frequency induction melting with non-vacuum melting condition, 1000 °C − 60 min solution treatment, 95% cold-rolling deformation, and 400 °C − 90 min aging treatment, the Cu-0.89Cr-0.44Ag alloy exhibited excellent mechanical-electrical properties with the tensile strength of 541.5 MPa and electrical conductivity of 83.2%IACS. Meanwhile, the Cu-0.94Cr-0.11Ag alloy showed a better cost performance (tensile strength*conductivity/raw material price per kg) about 800 MPa*%IACS/Yuan. These relevant results provided important references for research and development of the high-performance Cu-Cr-Ag alloy.
KW - Aging treatment
KW - Cu-Cr-Ag alloy
KW - Electrical conductivity
KW - Rolling deformation
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U2 - 10.1016/j.msea.2018.04.077
DO - 10.1016/j.msea.2018.04.077
M3 - Article
AN - SCOPUS:85046121125
SN - 0921-5093
VL - 726
SP - 208
EP - 214
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -