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Indexed by:期刊论文

Date of Publication:2017-11-01

Journal:METALS AND MATERIALS INTERNATIONAL

Included Journals:SCIE

Volume:23

Issue:6

Page Number:1197-1203

ISSN No.:1598-9623

Key Words:composites; casting; interfaces; mechanical properties; computer simulation

Abstract:An innovative horizontal continuous casting method was developed and successfully used to prepare copper-clad aluminum (CCA) rods with a diameter of 85 mm and a sheath thickness of 16 mm. The solidification structure and element distribution near the interface of the CCA ingots were investigated by means of a scanning electron microscope, an energy dispersive spectrometer, and an electron probe X-ray microanalyzer. The results showed that the proposed process can lead to a good metallurgical bond between Cu and Al. The interface between Cu and Al was a multilayered structure with a thickness of 200 mu m, consisting of Cu9Al4, CuAl2, alpha-Al/CuAl2 eutectic, and alpha-Al + alpha-Al/CuAl2 eutectic layers from the Cu side to the Al side. The mean tensile-shear strength of the CCA sample was 45 MPa, which fulfills the requirements for the further extrusion process. The bonding and diffusion mechanisms are also discussed in this paper.