%0 journal article
%@ 0167-577X
%A Luo, X., Ebel, T., Pyczak, F., Limberg, W., Lin, Y.

%D 2017
%J Materials Letters

%P 295-298 
%R doi:10.1016/j.matlet.2017.01.145
%T Carbide evolution and its potential reduction methods in Ti-22Nb based alloys prepared by metal injection moulding
%U https://doi.org/10.1016/j.matlet.2017.01.145
 
%X Carbide evolution was investigated in order to find methods to reduce the carbide precipitation because it lowers the ductility of metal injection moulded <beta>-Ti alloys. Comparing Ti-22Nb and Ti-22Nb-2/10Zr alloys, the crystal structure of carbides is unchanged, but the lattice parameter of <beta>-Ti increases, then carbide fraction slightly decreases. Dissolution of carbides occurs fast around <beta>-transus temperature via short circuit diffusion but it becomes slow with decreasing temperature because of uniform atomic detachment. Based on these results, a multiple step treatment was proposed which in conjunction with grain refinement by adding Y/Y2O3, can significantly decrease the carbide fraction of Ti-22Nb-10Zr-xY/Y2O3.