3D FINITE ELEMENT SIMULATION FOR CONTINUED EQUAL CHANNEL ANGULAR PRESSING(ECAP)

The effect of continued equal channel angular pressing(ECAP) with different pressing routes on the deformation homogeneity of structure is investigated by using 3D finite element models.The equivalent plastic strains on the section of specimens using different pressing routes are compared and it is seemed that the deformation distribution is more homogenous after two passes using pressing route C.But from the analysis of deformation character,it can be deduced that the pressing route BC is the most effective for deformation homogeneity after multi-pressing as long as the total pressing passes are times of four.It means that this route is the most favorable for achieving ultra-fine grained material with more homogenous microstructure.The above deduce is ultimately proved by the simulation results of four passes of ECAP process.