Deformation inhomogeneities of Mg–Al laminated metal composites fabricated by accumulative roll bonding

Abstract

Accumulative roll bonding (ARB) is an important method in the manufacture of bulk ultra-fine-grained materials. In this article, laminated composite sheets, consisting of Mg (AZ31)–Al (AA1100) sheets, are fabricated using ARB. The main manufacturing processes of multi-layered composite sheets are introduced, and their microstructure evolution and mechanical properties are investigated during the different ARB processes. The deformations of dissimilar metals are inhomogeneous owing to the different deformation resistances and plastic deformation abilities of the metals. These inhomogeneities are investigated, and the deformation characteristics and roll-bonding mechanisms are described, based on micro-analysis. Factors influencing the performance of the laminated sheets are presented. The results indicate that ARB is an effective method for producing laminated metal composites.

Keywords:

• Accumulative roll bonding
• Laminated metal composite
• Deformation inhomogeneity
• bonding interface