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The microstructure and properties evolution of Al–Si/Al–Mn clad sheet during plastic deformation

Published online by Cambridge University Press:  03 June 2013

Wang Yu ,
Zhang Xingguo ,
Meng Linggang ,
Zhu He ,
Zhao Min  and
Jiang Nan
Wang Yu
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
Zhang Xingguo*
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
Meng Linggang
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
Zhu He
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
Zhao Min
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
Jiang Nan
Affiliation:
Department of material science and engineering, Dalian University of Technology, Dalian 116024, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

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.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 12 , 28 June 2013 , pp. 1601 - 1608
Copyright
Copyright © Materials Research Society 2013 

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References

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