SIMULATION OF MICROSTRUCTURE EVOLUTION DURING EXTRUSION OF LARGE DEPTH-TO-DIAMETER RATIO VARIABLE CROSS-SECTION HOLLOW SHAFTS OF 6061 ALUMINUM ALLOY.

The hollow slender shaft is characterized by intricate component features such as a significant depth-to-diameter ratio, variable cross-sections, and non-uniform thin walls. Uneven deformation of the hollow slender shaft during deformation results in degradation of service performance. In this study, the deformation uniformity is explored from a microscopic point of view, the numerical simulation model of dynamic recrystallization of 6061 aluminum alloy is established with the DEFORM-3D software. And grain evolution during the aluminum alloy extrusion process was theoretically analyzed using the cellular automata. [ABSTRACT FROM AUTHOR]