Abstract
Ti-48Al-6Nb-xSi (x=0.5, 1 and 2) TiAl alloy ingots with different silicon addition were prepared, and then heat treated at different temperature, respectively. The effects of heat treatment temperature on the structure and mechanical properties of the Ti-48Al-6Nb-xSi alloy ingots were analyzed. The results show that the structure of the as-cast ingots are refind after heat treatment and the equiaxed grain area inthe ingots is increased and the width of the column grains become smaller with the increasing of the heat treatment temperature. Meanwhile, the lamellar structure become thinner. The microstructure of the alloy is changed from column grain structure to equiaxed grain structure with increasing of heat treatment temperature. And the amount of Ti5Si3 phase is reduced, while its distribution become more uniform. The microhardness of Ti-48Al-6Nb-xSi alloys is increased with silicon content increasing and decreased with increasing of the heat treatment temperature.
| Translated title of the contribution | Effects of Heat Treatment on the Structure and Mechanical Properties of Ti-48Al-6Nb-xSi Alloys |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 735-739 |
| Number of pages | 5 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 40 |
| Issue number | 7 |
| DOIs | |
| State | Published - 20 Jul 2020 |
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