Microstructural and mechanical characteristics of EUROFER'97 processed by equal channel angular pressing

EUROFER'97 was processed by equal channel angular pressing (ECAP) at 823 K for a total of 4 or 8 passes, using a die angle of 105°, and its microstructure and tensile behavior in temperature range 568-873 K investigated. A single ECAP pass developed a deformation texture {1 1 0} ¿0 1 1¿ that was practically stable during subsequent ECAP passes. The materials processed by 1 or 2 passes exhibited a fine microstructure of recovered subgrains and tensile behavior very similar to that for the tempered material in the as-received condition. The materials processed using 4 or 8 passes exhibited nearly equiaxial submicron grained structures with a high density of high-angle grain boundaries. These materials became softer than the as-received material at a testing temperature of ~823 K. EUROFER ECAP processed under the present conditions exhibited hardening ratio somewhat higher than that of the as-received material. © 2010 Elsevier B.V. All rights reserved.

deformation texture die angle eurofer fine microstructure high angle grain boundaries high density mechanical characteristics micro-structural subgrains submicron temperature range tensile behaviors testing temperature grain boundaries materials materials testing microstructure pressing (forming) equal channel angular pressing

Microstructural and mechanical characteristics of EUROFER'97 processed by equal channel angular pressing Articles