Effect of Ag micro-alloying on the microstructure and properties of Cu-14Fe in situ composite
Effect of Ag micro-alloying on the microstructure and properties of Cu-14Fe in situ composite
复制标题
Ag微合金化对Cu-14Fe原位复合材料组织与性能的影响
DOI：
10.1016/j.msea.2010.04.051
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发表时间：
2010-07-15
期刊：
影响因子：
6.4
通讯作者：
Zeng, S. M.
中科院分区：
文献类型：
--
作者：
Liu, K. M.;Lu, D. P.;Zeng, S. M.
This paper studied Ag micro-alloying in the deformation-processed Cu-14Fe in situ composite, by a comparison of Cu-14Fe and Cu-14Fe-0.06Ag. Each alloy was prepared by casting and processed into an in situ composite by hot and cold working. The microstructures were documented using light microscopy and scanning electron microscopy (SEM). The mechanical properties were measured with a tensile-testing machine. The electrical conductivity was measured with a micro-ohmmeter. For both alloys, the as-cast microstructure consisted of a Cu matrix and Fe dendrites; after hot and cold working the microstructure consisted of a Cu matrix containing Fe fibres elongated in the working direction. The as-cast Ag-containing alloy contained finer Fe dendrites. The Ag-containing in situ composite had thinner Fe fibres, higher tensile strength, higher ductility, and higher conductivity. The cold worked Cu-14Fe-0.06Ag in situ composite with cumulative cold deformation strain eta = 7.8 (where eta = In(A(0)/A) and A(0) and A are the original and final cross-section areas, respectively), achieved a tensile strength of 930 MPa and a conductivity of 56%IACS (International Annealed Copper Standard; 17.241 n Omega m is defined as 100%IACS). The Ag micro-alloyed in situ composite had a combination of properties comparable to that of a much more expensive alloy containing much more Ag. After 1 h heat treatment at 300 degrees C, the tensile strength was increased to 950 MPa and the conductivity was increased to 56.4%IACS. (C) 2010 Elsevier B.V. All rights reserved.
