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In order to predict defects of extrusion especially the surface cracks caused by hyperbolic curve die and parabolic curve die in direct extrusion process, three-dimensional (3D) thermo-mechanically coupled finite element simulations of extruding AZ31 alloy into small rod at certain ram speeds have been performed using DEFORM™-3D. A half of the geometries including billet and dies with hyperbolic curve...
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