EFFECT OF CHANNEL ANGLE AND FRICTION IN MODIFIED ECAP-CONFORM PROCESS OF Al-۶۰۶۱: A NUMERICAL STUDY

Equal-channel angular pressing (ECAP) combined with the Conform process provides a solution for the continuous production of ultrafine-grained materials. In the present study finite element method was executed to investigate the effects of die channel angle and friction on the strain homogeneity and the required torque in ECAP-Conform process. Deformation behaviour of Al ۶۰۶۱ wires was analyzed by using the ABAQUS/Explicit software. Finite element analyses by considering different channel angles (۹۰ᵒ, ۱۰۰ᵒ and ۱۱۰ᵒ) and various friction conditions of ۰.۲, ۰.۳ and ۰.۴ were surveyed. The results revealed two distinct trends in which by increasing the channel angle among ۹۰ᵒ to ۱۱۰ᵒ, the amount of induced plastic strain through the wire reduced about ۴۰%. Also required processing torque was decreased about۵۰%. In addition more homogeneity was observed in higher angle values. The results regarding to equivalent strain, obtained from FE analyses, showed a good agreement with previous studies. Eventually plastic strains and required torque were increased about ۸% and ۱۲% when friction coefficient raised between (۰.۲-۰.۴).

کلیدواژه ها:

SPD ، ECAP-Conform ، Numerical Study ، Al ۶۰۶۱