TITLE:
Evolution of Microstructure in a Cu-Cr in situ Composite Produced by Thermo-Mechanical Processing
AUTHORS:
Keming Liu, Deping Lu, Kai Fu, Peilan Luo, Zhikai Huang, Wei Guo, Jiuming Yu, Jin Zou, Qiang Hu
KEYWORDS:
Cu-Cr, in situ Composite, Evolution, Microstructure, Thermo-Mechanical Processing
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.5 No.7,
July
7,
2017
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.