Wire drawing deformation of copper wire was carried out under a cryogenic condition. The effects of different wire drawing die diameters on the microstructure and properties of the pure copper wires were investigated in the process of cryogenic deformation. The results show that some sub-grain, twin crystal and microstructure unceasingly produce in the late deformation. The tensile strength of the copper wire increases sharply with the decrease of the diameter of wire drawing die,while its elongation contin...
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