%0 book part
%@ 
%A Rackel, M.W.,Stark, A.,gabrisch, H.,Schell, N.,Schreyer, A.,Pyczak, F.

%D 2016
%J PHOTON SCIENCE 2016 - Highlights and Annual Report, Jahresbericht des Bereichs Forschung mit Photonen bei DESY
%N 
%P 44-45 

%T Direct insights into phase transformations in nano-scaled microstructures - Observation of orthorhombic phase formation in an advanced Gamma-TiAl alloy
%U 
 
%X Intermetallic titanium aluminide alloys, based on the ordered γ-TiAl phase, were recently introduced into civilian aero engines as a structural blade material. Nevertheless, their attractive property profile, light-weight combined with high-temperature strength has room for improvements, as for example, their room-temperature ductility remains low.,Advanced Gamma-TiAl alloys with nano-scale modulated microstructures show significantly enhanced ductility behaviour. The microstructural modulation consists of several phases and at least one orthorhombic phase. Using in situ highenergy X-ray diffraction experiments we studied orthorhombic phase formation and have elucidated the formation path and the crystallographic structure of the phase that is formed.