%0 journal article
%@ 1438-1656
%A Stark, A.,Bartels, A.,Gerling, R.,Schimansky, F.P.,Clemens, H.

%D 2006
%J Advanced Engineering Materials
%N 11
%P 1101-1108 
%R doi:10.1002/adem.200600127
%T Microstructure and Texture Formation during Hot Rolling of Niobium-Rich Gamma TiAl Alloys with Different Carbon Contents
%U https://doi.org/10.1002/adem.200600127
11 
%X Three Gamma-TiAl alloys with a base composition of Ti-45Al-7.5Nb (at. %) and different carbon contents were used for hot rolling experiments. The alloys were powder metallurgically produced and subsequently hot-isostatically pressed. Two hot rolling series with different degrees of reduction during the rolling steps have been performed at temperatures in the upper range of the ( Alpha+Gamma ) phase field. Samples for texture analysis and metallography were taken from various stages of the rolling process as well as after additional annealing. Light-optical and scanning electron microscopy images clearly show the influence of the different carbon contents on the recrystallization behaviour. The rolling texture of the -TiAl phase is dominated by texture components, which indicate mechanical twinning as a predominant deformation mechanism. The hot rolling texture of the -Ti(Al) phase exhibits components similar to those known from titanium based alloys as well as components probably resulting from co-deformation with the Gamma-TiAl phase.