Numerical simulations of impacts during Surface Mechanical Attrition Treatment using crystal plasticity model with finite element method
Congrès Français de Mécanique 2017 (CFM2017), Lille, Août 2007
Surface Mechanical Attrition Treatment (SMAT) is able to transform the top surface layer of materials from coarse grains to nano-sized grains by severe plastic deformation. SMAT is based on multidirectional mechanical impacts between balls and the surface of material. In this work, a crystal plasticity model introduced in finite element analysis, which takes into account the microstructure, is used to investigate the plastic activities due to the impacts between balls and the surface of material. A phenomenological crystal plasticity model implemented through user-defined ABAQUS subroutines is used in this work to perform numerical simulations. A set of parameters are studied such as ball size, crystal orientation, impact velocity, incident angle. The influences of these different parameters on plastic slip activities are analyzed. The first results demonstrate the interests of such numerical simulations for this specific process.