Inhomogeneous Deformation of Multilayered Roll-Bonded Brass/Cu Composites

Nan Jia¹，Ming-Wei Zhu²，Yi-Ran Zheng¹，Tong He³，Xiang Zhao¹

1. Key Laboratory for Anisotropy and Texture of Materials (ATM),Northeastern University2. Shenyang National Laboratory for Materials Science,Institute of Metal Research, Chinese Academy of Sciences3. Research Institute, Northeastern University

摘 要：The deformation gradients in multilayered hot roll-bonded composite materials incorporating two dissimilar face-centered cubic metals, i.e., brass and Cu, were investigated by characterizing the deformation microstructure, hardness and texture at different thickness positions of the composites. For the constitutive metals, the center part of each metal sheet forms the substructure containing coarse grains, while the ultrafine grains and significant shear banding form in the outer part. As deformation increases, the cross-interface shear occurs in the Cu sheet of the composites. Then, grain fragmentation, shear banding and dynamic recovery become the main factors that influence hardness of the metal.Moreover, in the co-deformed composites, the interface between brass and Cu plays a role in texture developments of the individual metals.

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