| Title |
Changes of Microstructures and mechanical Properties in Tial Intermetallic compounds |
| Authors |
김윤태(Yoon Tae Kim); 최갑송(Kab Song Choi); 조현기(Hyun Kee Cho) |
| Abstract |
The intermetallic compound TiAl alloys were investigated to characterize microstructures and to define relationships between the microstructure and mechanical property by microstructural control method. The compression and hardness tests to study mechanical properties of two TiAl alloys were experimented. Also, the study to confirm the process of the formation and growth of lamellar structure were done by TEM and SEM. The resulting lamellar structures that were preferentially formed at grain boundary could be classified into two groups. Namely, α₂plates were formed in γ matrix according to heat treatment temperature, and vice versa. Ti 48 at.% Al specimen is superior to Ti 45 at.% Al in ductility. Axis ratio and lattice volume increased with Al content and hardness decreased with heat treatment temperature. |