Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 4 No. 3 September 1994|
（Pouoder Metallurgical Research Institute ; Central South University of Technology ; Changsha 410083）
Abstract:The effect of Sb addition on the microstructures and room-temperature mechanical properties of Ti-34 wt.-% Al alloy was investigated. The experimental results showed that the microstructure of Ti-34 wt.-% Al alloy changed from as-cast coarse columnar into narrow columnar grains due to Sb addition , and that the room temperature bending strength and ductility of TiAl+Sb alloy were relatively high compared with those of the binary alloy. Fractograph analysis exhibited that the crack could propagate in single Y phase and there were more tear ridges in TiAl+Sb alloys.
Key words: Sb micrcotructure TiAl intermetallic compound