Abstract
The effect of thermo-mechanical processing on microstructure and property of Ti-1023 titanium alloy was studied in this paper. Based on the investigation, a better thermo-mechanical processing was obtained. The results show that, during low-temperature (300°C) aging, transitional ω-phase is precipitated, providing a high density of nucleation sites for the secondary α phase, so uniformly distributed α laths are obtained by two-step aging. During hot rolling, β grains are refined and defects are generated. The defects assist the nucleation of secondary α phase during aging. Therefore the strength and plasticity of Ti-1023 alloy are improved by the combined action of two-step aging and hot rolling. After deformation (deformation temperature and deformation reduction are 845°C and 45%, respectively) and two-step aging (300°C/8 h+500°C/16 h), the microstructure of Ti-1023 alloy is refined which results in a finer strength and plasticity match.
| Original language | English |
|---|---|
| Pages (from-to) | 48-51 |
| Number of pages | 4 |
| Journal | Hangkong Cailiao Xuebao/Journal of Aeronautical Materials |
| Volume | 31 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2011 |
Keywords
- Mechanical property
- Microstructure
- Thermo-mechanical processing
- Ti-1023 alloy