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Evolution of Microstructure in a Cu-Cr in situ Composite Produced by Thermo-Mechanical Processing

¹ Jiangxi Key Laboratory for Precision Drive and Control, Nanchang Institute of Technology, Nanchang, China
² Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, China
³ Jiangxi Key Laboratory for Precision Drive and Control, Nanchang Institute of Technology, Nanchang, China
⁴ Jiangxi Key Laboratory for Precision Drive and Control, Nanchang Institute of Technology, Nanchang, China
⁵ Jiangxi Key Laboratory for Precision Drive and Control, Nanchang Institute of Technology, Nanchang, China
⁶ Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, China
⁷ Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, China
⁸ Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, China
⁹ Jiangxi Key Laboratory for Advanced Copper and Tungsten Materials, Jiangxi Academy of Sciences, Nanchang, China

Journal of Materials Science and Chemical Engineering·Volume 05 (2017)·Pages 29–35·Published 7 July 2017·DOI10.4236/msce.2017.57004

Abstract

This paper studied the microstructure evolution of a deformation-processed Cu-7Cr in situ composite prepared by thermo-mechanical processing. The longitudinal and transverse sectional microstructures were analyzed using an optical microscope and a scanning electronic microscope. In the longitudinal section, the initially randomly distributed Cr dendrites in the as-cast Cu-7Cr alloy were transformed into the fibres aligned parallel to the drawing axis; the Cr dendrites experienced breaking, flattening and rotating, lapping and merging, and homogenizing and refinement during thermo-mechanical processing. In the transverse section, the initially randomly distributed Cr dendrites in the as-cast Cu-7Cr alloy were changed into the curvy ribbon like fibres; the Cr dendrites underwent breaking, flattening and rotating, folding and twisting, and irregularizing and refinement during thermo-mechanical processing.

KeywordsCu-Crin situ CompositeEvolutionMicrostructureThermo-Mechanical Processing

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Evolution of Microstructure in a Cu-Cr in situ Composite Produced by Thermo-Mechanical Processing

Abstract

References (16)