%0 journal article
%@ 0966-9795
%A Cha, L., Scheu, C., Clemens, H., Chladil, H.F., Dehm, G., Gerling, R., Bartels, A.

%D 2008
%J Intermetallics
%N 7
%P 868-875 
%R doi:10.1016/j.intermet.2008.03.009
%T Nanometer-scaled lamellar microstructures in Ti–45Al–7.5Nb–(0; 0.5)C alloys and their influence on hardness
%U https://doi.org/10.1016/j.intermet.2008.03.009
7 
%X In this study, nanometer-scaled lamellar microstructures were adjusted in Ti–45Al–7.5Nb–(0; 0.5C) alloys (in at.%) and analyzed by means of transmission electron microscopy. Different annealing temperatures subsequent to quenching were used to obtain well-defined lamellar microstructures with ultrafine widths of a few tens of nanometers to a few nanometers. Surprisingly, the hardness of these alloys is enhanced by increasing the volume fraction of γ-TiAl laths. This behavior is different from the results reported in literature and can be explained by the occurrence of a size effect. The nanometer-size γ laths became harder than the greek small letter alpha2-Ti3Al laths which are 10 times wider.