Abstract
The effects of aging temperature and aging time on microstructure evolution and mechanical properties of Ti-6Al-2.5V-1.5Fe-0.15O alloy prepared by high vacuum non consumable arc furnace were investigated after solid solution treatment and air cooling. The results reveal that with a lower aging temperature, nuclear energy of α is low, leading to diffusion diffuculy of elements, so α nucleation needs the aid of dispersed ω phase, which results in the small and dispersed needle-like α phase. With increasing in aging temperature, driven force of nucleation and growth of α phase are increased, resulting in easy to be grown up of aging phase. With increasing in aging time, the aging α phase is coarsened, and the aging region is increased. After aging treatment, α phase is responsible for the increase of alloy strength. As the aging time increase, the yield strength and the peak strength are decreased, while the fracture strain is increased.
| Original language | English |
|---|---|
| Pages (from-to) | 675-678 |
| Number of pages | 4 |
| Journal | Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys |
| Volume | 37 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2017 |
Keywords
- Aging Treatment
- Mechanical Properties
- Microstructure
- Ti Alloy
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