[Zurück]

F. Warchomicka, C. Poletti, M. Stockinger, T. Henke:
"Microstructure evolution during hot deformation of Ti-6Al-4V double cones specimens";
Vortrag: Esaform, Brescia - Italy; 07.04.2010 - 09.04.2010; in: "International Journal of Material Forming", International Journal of Material Forming, Volume 3 supplement 1 (2010), ISSN: 1960-6206; S. 215 - 218.

Double cone specimens of Ti-6Al-4V alloy with a bimodal starting structure have been heat treated and
then compressed at temperatures near to the beta transus (Tβ ±70K) with strain rates between 0.1 and 5s-1. The deformed
specimens were immediately quenched to conserve the phase distribution. Alpha grains maintain their morphology
during deformation in the alpha + beta region up to 0.2 of strain. Dynamic recrystallization of the alpha grains is
observed using EBSD technique at strains of 1 for all the strain rates. Dynamic recrystallization of beta phase takes
place in samples deformed above the beta transus temperature. There, the beta grains´ shape does not change up to 0.3
of strain. The grade of recrystallization depends on the previous heat treatment, and the recrystallized grain size on the
strain rate and the temperature of deformation.

Hot deformation, microstructure, forging, titanium alloys, recrystallization, compression tests

http://dx.doi.org/10.1007/s12289-010-0745-9