The effect of yttrium on the microstructure and properties of Ti-5.5Al-3.5Sn-3.0Zr-1Nb-0.3Mo-0.3Si (IMI 829) and Ti-14Al-21Nb high temperature alloys was studied by using optical microscope, SEM and mechanical property testing devices. The results show that the microstructure and grains of the two alloys can be fined by adding yttrium. For IMI829-0.2Y alloy, the favorable mechanical properties at room temperature and creep properties at 550℃ are obtained, and the high temperature mechanical properties of Ti-14Al-21Nb-0.1Y alloy are improved as well.
参考文献
| [1] | Qin Kuiqing;Tang Shisheng;Wang Lida.Science and Engineering of Titanium-proceeding of the 6th National Conference of Ti and Ti-alloy Scientific Symposium[C].北京:原子能出版社,1987:63. |
| [2] | Sun Fusheng.Thesis for Master's Degree[M].Beijing Research Institute of Aviation Materials,1998 |
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