Influence of technological parameters of rolling in screw shaped rolls and longitudinal wedge mill on formation of nano structure in thin sheets from aluminum AD31 alloy

Abstract

New technology for the production of sheet metal with a nanostracture is presented in the article. Screw-shaped roll was used to develop seene plastic deformation and therefore to obtain nanostructure. The stress-strain state (SSS) of the workpiece during rolling in screw-rolled rolls and longitudinal-wedge mill (LWM) was investigated. Finite element method and the MSC.SuperForge software were exploited to obtain quantitative data and establishthe main distribution regularities of SSS and temperature during modelling of rolling process in the screwshaped roll and LWM with different number of passes and single reduction. A rational technology of rolling of aluminum AD31 alloy has been developed andtested under the laboratory conditions. Analysis of the influence of the rolling modes m screw-shaped rolls and LWM on the formation of nanostructures m an aluminum AD31 alloy was m particular interest.