%0 journal article
%@ 1044-5803
%A Musi, M.,Erdely, P.,Rashkova, B.,Clemens, H.,Stark, A.,Staron, P.,Schell, N.,Mayer, S.

%D 2019
%J Materials Characterization
%N 
%P 398-405 
%R doi:10.1016/j.matchar.2018.11.025
%T Evidence of an orthorhombic transition phase in a Ti-44Al-3Mo (at.%) alloy using in situ synchrotron diffraction and transmission electron microscopy
%U https://doi.org/10.1016/j.matchar.2018.11.025
 
%X Alloying of a binary system with an additional element often leads to the formation of new phases. In this work, a γ-TiAl based alloy with 3 at.% molybdenum was investigated, which was quenched from 1450 °C. Upon reheating, the formation of an orthorhombic phase was observed with the help of in situ high-energy X-ray diffraction. This phase formed at 600 °C and vanished again at 720 °C, and acts as a transition phase between the α2 and the γ phase. Such a transition phase has not been observed before in this type of alloy. Additionally, transmission electron microscopy was used to study the microstructure of selected sample states on a sub-micrometer level. The orthorhombic phase formed fine lamellae inside the α2 phase and the α2′ martensite.