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Influence of cold deformation and Ti element on the microstructure and properties of Cu–Cr system alloys

Published online by Cambridge University Press:  21 May 2015

Pengchao Zhang ,
Jinchuan Jie ,
Yuan Gao ,
Hang Li ,
Tongmin Wang  and
Tingju Li
Pengchao Zhang
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
Jinchuan Jie*
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
Yuan Gao
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
Hang Li
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
Tongmin Wang*
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
Tingju Li
Affiliation:
School of Materials Science and Engineering, Laboratory of Special Processing of Raw Materials, Dalian University of Technology, Dalian 116024, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

The Cu–Cr system alloys with different Ti contents were prepared and processed by deformation and heat treatment. The microstructures, mechanical, and electrical properties were investigated under as-cast and aged conditions. The results indicate that the Cr precipitates present a dispersed distribution and exhibit a face-centered cubic (fcc) structure rather than equilibrium body-centered cubic (bcc) structure in the initial stage of aging. A certain amount of Ti atoms dissolves in matrix due to the large solid solubility, while the remaining atoms segregate around the interface of the Cr precipitates to form a sandwich structure. Improvement of mechanical properties is achieved with Ti addition and the increasing rolling reduction, which can be ascribed to multiple mechanisms. In addition, Ti has a negative effect on the electrical conductivity, while deformation has a slight effect on conductivity.

Keywords

Cu–Cr–Ti alloycold workingmicrostructuremechanical propertieselectrical properties
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 13 , 14 July 2015 , pp. 2073 - 2080
Copyright
Copyright © Materials Research Society 2015 

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