Structures and mechanical properties of TiAl-base alloys have been studied, in which Zr, Nb, V or Mn is added as the third element and the Al content is changed. Behavior of the third element in the TiAl-base alloys and effects of various factors on ductility have been discussed. It has been concluded that the Ti-48.4 at% Al-1.0 at% Mn alloy is the optimum composition for obtaining good room temperature ductility.
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Tsujimoto, T., Hashimoto, K. Structures and Properties of TiAl-Base Alloys Containing Mn. MRS Online Proceedings Library 133, 391 (1988). https://doi.org/10.1557/PROC-133-391