The mechanical compression performance of ultra-fine grained stainless steel pyramidal lattice core

Abstract

Severe plastic deformation (SPD) techniques are prospective ones having ability for desirable high mechanical properties to be achieved without any chemical change in metals. Equal-channel angular pressing (ECAP), one of SPD techniques, was used to obtain ultra-high mechanical compressive response of stainless steel pyramidal lattice core. For this purpose, the stainless steel 304 L samples were processed by ECAP at 500 degrees C. Then, it was sliced into struts and built lattice core after bending processes. At the compression tests, the ECAP lattice core has huge mechanical properties, at nearly two times collapse load and energy absorption values.