Abstract
Titanium aluminide (TiAl)-based alloys are developed for high-temperature applications in aerospace and automotive industries because of their attractive properties, such as low density, high specific strength, high specific stiffness, and good high-temperature properties. This chapter discusses TiAl-based alloys prepared with the prealloyed (PA) powder metallurgy (PM) technology. It begins by presenting a plasma rotating electrode process (PREP) method for the production of PA spherical TiAl powders with low interstitial elements. It then introduces the consolidation and deformation behaviors of the PA powders and the resulting mechanical properties. Finally, the differences in the deformation behaviors and mechanical properties between the PM TiAl-based alloys and the ingot metallurgy (IM) TiAl-based alloys are discussed.
Published Version
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