%0 journal article
%@ 0921-5093
%A Okulov, I.V., Boenisch, M., Volegov, A.S., Shakur Shahabi, H., Wendrock, H., Gemming, T., Eckert, J.

%D 2017
%J Materials Science and Engineering  A

%P 673-678 
%R doi:10.1016/j.msea.2016.11.082
%T Micro-to-nano-scale deformation mechanism of a Ti-based dendritic-ultrafine eutectic alloy exhibiting large tensile ductility
%U https://doi.org/10.1016/j.msea.2016.11.082
 
%X Deformation mechanism of a new Ti-16.6Nb-6Co-5.1Cu-6.5Al (at%) alloy is studied using scanning and transmission electron microscopy. The alloy consists of micrometer-sized β-Ti dendrites and an ultrafine-eutectic composed of β-Ti and TiCo phases. The yield strength of the alloy (1.1 GPa) is comparable to that of the metallic glass composites and is coupled with large tensile ductility of about 11%. Transmission electron microscopy analysis reveals that slip lines formed during deformation in the dendrites penetrates the eutectic resulting in formation of a stepped interface and an extra area serving to accommodate shear strains. The β-Ti eutectic component can deform plastically to a high degree supporting deformation of TiCo. The results suggest that microstructural design of the eutectic is important for controlling tensile ductility of dendritic-ultrafine eutectic alloys.