The microstructure and property of Al–Si alloy and Al–Mn alloy bimetal prepared by continuous casting

• DOI: 10.1016/j.matlet.2011.08.112
• Publication Date: 2011-09-07T13:13:56Z
• Authors: Jianbo Sun; Xiaoyang Song; Tongmin Wang; Yingshui Yu; Min Sun; Zhiqiang Cao; Tingju Li
• Keywords: 0203 mechanical engineering; 0103 physical sciences; 02 engineering and technology; 01 natural sciences

Abstract The Al–10%Si alloy and Al–1%Mn alloy bimetal slabs are prepared by continuous casting. The microstructures around the interface are investigated, chemical composition distributions across the interface are detected, and tensile strengths are evaluated at the top, center and bottom regions of the bimetal slab. The results show that the Al–1%Mn alloy serves as a substrate of heterogeneous nucleation of Al–10%Si alloy at the bimetal interface. The metallurgical bonding is excellent without any discontinuities along the interface due to the diffusions of Si and Mn elements. The thickness of diffusion layers is about 40 μm on average. The tensile strengths of the top, center and bottom regions of the bimetal slab tend to be uniform.