The effect of grain size on dynamic tensile extrusion behaviour

Leeju Park, Hack Jun Kim, Seok Bong Kim, E. Cadoni
2015 EPJ Web of Conferences  
Dynamic tensile extrusion (DTE) tests were conducted on coarse grained and ultrafine grained (UFG) OFHC Cu, Interstitial free (IF) Steel, and pure Ta. Equal channel angular pressing (ECAP) of 16passes with Bc for Cu, IF Steel and 4 passes for Ta was employed to fabricated UFG materials. DTE tests were carried out by launching the sphere samples (Dia. 7.62 mm) to the conical extrusion die at a speed of ∼500 m/sec. The fragmentation behavior of the soft-recovered fragments were examined and
more » ... examined and compared with each other. The DTE fragmentation behavior of CG and UFG was numerically simulated by the LS-DYNA FEM code.
doi:10.1051/epjconf/20159402011 fatcat:nuqiicezszedpj2pfpi2j6wape