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论文类型： 期刊论文

发表时间： 2013-06-01

发表刊物： JOURNAL OF MATERIALS RESEARCH

收录刊物： SCIE、EI、Scopus

卷号： 28

期号： 12

页面范围： 1601-1608

ISSN号： 0884-2914

摘要： The microstructure evolution and diffusion of silicon during heat-treatment and plastic deformation process were studied on the clad plates of Al-Mn/Al-Si aluminum composite fabricated by continuous casting. The results show that when the clad slab is homogenized and hot rolled, silicon diffuses across the interface from the Al-Si alloy (4004) side to the Al-Mn alloy (3003) side and dissolves into the 3003 matrix forming a solid solution. However, after deformation by cold-rolling, the increased driving force for precipitation of the solute elements in the core alloy side along with the abundant defects introduced by the severe deformation promotes the precipitation. Some Mg2Si particles precipitate from the solid solutions to form a transition region close to the interface of the two components. The presented transition area not only benefits the microstructure of the clad sheet but also improves the distribution of the microhardness across the interface, a tendency of gradient transition.