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论文类型：期刊论文

发表时间：2017-11-01

发表刊物：METALS AND MATERIALS INTERNATIONAL

收录刊物：SCIE

卷号：23

期号：6

页面范围：1197-1203

ISSN号：1598-9623

关键字：composites; casting; interfaces; mechanical properties; computer simulation

摘要：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.