中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 3 March 2012 |
mechanical properties of TiAl intermetallics
（State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The ductility of TiAl intermetallics can be improved through stabilizing the ductile β phase. New β-stabilized Ti−45Al−xFe−yMo (x, y=1, 2, 3, 4) alloys were designed through adding the β stabilizing elements Fe and Mo. The microstructural evolution and deformation behavior of the Ti−45Al−xFe−yMo alloys were investigated. The results show that the amount of β(B2) phase is increased with the increase of alloying elements. Mo shows a higher capability for stabilizing the β phase than Fe. In the optimized Ti−45Al−3Fe−2Mo alloy, the grains are significantly refined to about 12 μm, and this alloy shows a very good hot ductility at the elevated temperature.
Key words: TiAl intermetallics; Fe; Mo; β phase; grain refinement
