Influence of Ag micro-alloying on the microstructure and properties of Cu–7Cr in situ composite

This paper studied the influence of Ag micro-alloying on the deformation-processed Cu–7Cr in situ composite, by a comparison of Cu–7Cr and Cu–7Cr–0.07Ag. For both alloys, the as-cast microstructure consisted of a Cu matrix and Cr dendrites; after hot and cold working the microstructure consisted of...

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Bibliographic Details
Published in:Journal of alloys and compounds 2010-06, Vol.500 (2), p.L22-L25
Main Authors: Liu, Keming, Lu, Deping, Zhou, Haitao, Atrens, Andrej, Chen, Zhibao, Zou, Jin, Zeng, Sumin
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cu alloy
Deformation and plasticity (including yield, ductility, and superplasticity)
Electrical conductivity
Exact sciences and technology
In situ composite
Mechanical and acoustical properties of condensed matter
Mechanical properties of solids
Microstructure
Physics
Strength
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Summary:This paper studied the influence of Ag micro-alloying on the deformation-processed Cu–7Cr in situ composite, by a comparison of Cu–7Cr and Cu–7Cr–0.07Ag. For both alloys, the as-cast microstructure consisted of a Cu matrix and Cr dendrites; after hot and cold working the microstructure consisted of a Cu matrix containing Cr fibres elongated in the working direction. The as-cast microstructure of the Ag-containing alloy contained finer Cr dendrites. The Ag-containing in situ composite had thinner Cr fibres, higher tensile strength, higher ductility, and slightly higher conductivity. The Cu–7Cr–0.07Ag in situ composite had a good combination of properties: a tensile strength of 772 MPa and a conductivity of 77.3%IACS.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2010.03.246