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

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 bim...

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Bibliographic Details
Published in:Materials letters 2012-01, Vol.67 (1), p.21-23
Main Authors: Sun, Jianbo, Song, Xiaoyang, Wang, Tongmin, Yu, Yingshui, Sun, Min, Cao, Zhiqiang, Li, Tingju
Format: Article
Language:English
Subjects:
alloys
Aluminum base alloys
Bimetal
Bimetals
chemical composition
Composite materials
Continuous casting
Diffusion bonding
Diffusion welding
Discontinuity
Intermetallic compounds
manganese
Microstructure
silicon
Slabs
Tensile strength
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Summary: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. ► The bimetal slab consisting of Al–10%Si alloy and Al–1%Mn is produced by cast. ► Metallurgical bond occurs during the solidification due to diffusions of Si and Mn. ► The thickness of the diffusion layer of the bimetal slab is about 40 μm. ► Al–1%Mn alloy serves as the substrate for heterogeneous nucleation of Al–10%Si alloy.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.08.112