Abstract
The effects of annealing temperature on microstructure and mechanical properties of Ti-0.3Mo-0.8Ni-0.5Al-0.5Zr alloy sheet were investigated. The results indicate that the strip α phase gradually tends to be equiaxed and grown with the increase of annealing temperature. Recrystallization occurs during annealing，and low angle grain bound⁃ aries（LAGBs）are gradually transformed into medium angle grain boundaries（MAGBs）and high angle grain boundar⁃ ies（HAGBs）. With annealing temperature increasing，the crystal orientation distribution of α phase is random with the reduction of tensile strength，while the elongation is gradually increased. After annealing at 800 ℃ for 2 h，desirable comprehensive mechanical properties are obtained. Fracture observation reveals that tearing ridges and dimples exist at the fracture，and the size of dimples is gradually increased with the increase of annealing temperature，which is chracter⁃ ized by ductile fracture. Vickers hardness is firstly increased and then decreased with the increase of annealing tempera⁃ ture，and softening phenomenon occurs after annealing at a higher temperature.
| Translated title of the contribution | Effects of Annealing Temperature on Microstructure and Properties of Near α Titanium Alloy Sheet |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 730-736 |
| Number of pages | 7 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 45 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2025 |
| Externally published | Yes |