Shi Qing-nan

The characteristics of the deformation and flow process in the rolling of metal sheets and metal powders of composite materials

Abstract The rolling of metal sheets and metal powders of composite materials is anaasymmetric rolling process for the workpiece. The deformation of the rolled-piece, powder gains and the joining deformation of the composite interface are discussed and analyzed in this paper. Many experimental results are given for the deformation of the powder and the bending tendency of the rolled-piece. The characteristic of metallic deformation and flow process are discussed. Finally, some conclusions regarding the composite rolling process are given.

Deformation analysis of composites formed by powder plating and rolling

Abstract Composite rolling with metallic powders and metallic sheet is a new technology for producing composites. In this paper, samples of composites of Cu — steel, Al —steel, Sn — steel and Stainless steel — steel have been formed with this method. The relationships between the rolling force and the deformation of both the powders and the metal matrix have been studied. Some conclusions are drawn.

The microstructure of composite bands formed by powder plating and rolling (PPR)

Abstract Different kinds of metal powder have been plated onto a band of mild steel and then both of them rolled together. With this new method, some composites bands such as Cu steel, Al steel, Sn steel, etc., have been made. Using TEM the microstructure of the composite bands has been analyzed. It has been found that the metal powders are deformed by force and that their surface area increases by nearly one hundred times. Finally, the powder grains overlap each other, combine together, and change into a composite-lamella which again combines quickly with the matrix. The microstructure of the composite is different from that of previous composites. In this work, EPM is also used to analyze the deformation of the metal powders. The relation between the deformation of the powders and the reduction is discussed.