%0 Journal Article
%T EVOLUTION OF MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ULTRA-FINE-GRAINED INTERSTITIAL-FREE STEEL PROCESSED BY EQUAL CHANNEL ANGULAR PRESSING
%A Tom¨¢£¿ Kraj¨¾¨¢k
%A Kristi¨¢n M¨¢this
%J Materials Engineering
%D 2013
%I Faculty of Mechanical Engineering, Univerzity of Zilina
%X Equal channel angular pressing (ECAP) is one of the severe plastic deformation techniques which is widely used for producing metals with ultra- ne-grained microstructures. In the present work the influence of number of pressing by route BC on grain size, evolution of microstructure and mechanical properties of interstitial-free (IF) steel has been investigated by means of optical microscopy, electron back-scattering diffraction (EBSD) and tensile tests. It has been found, that the grain size decreases with increasing number of passes. Simultaneously tensile strength increases. The thermal stability of ECAP-processed microstructures has been also examined. It was found that the degradation of mechanical properties occurs only above 600  C and 700  C.
%K Equal channel angular pressing
%K IF steel
%K Grain size
%K TEM
%K Microhardness
%U http://fstroj.uniza.sk/journal-mi/PDF/2013/09-2013.pdf