Abstract
The microstructural features of B2 phase region isothermally forged Ti-22Al-25Nb (at%) orthorhombic alloy during heat treatment were quantitatively investigated. The volume fraction of the each phase, the width and length of the primary coarse lamellar O phase and secondary fine lamellar O phase in the alloy at different heat treatment temperatures were measured by image analysis software. The relationship between microstructure parameters and microhardness was analyzed with a multiple regression analysis technique. The results indicate that the microstructure of this alloy is mainly depended on the heat treatment schedule. The width of primary coarse and secondary fine lamellar O phase, and volume fraction of total precipitates can be controlled. Experimental and statistical results show a great linear relationship between the microstructure parameters and microhardness.
| Original language | English |
|---|---|
| Pages (from-to) | 71-75 |
| Number of pages | 5 |
| Journal | Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment |
| Volume | 37 |
| Issue number | 1 |
| State | Published - 25 Jan 2016 |
Keywords
- Heat treatment
- Microhardness
- Microstructural evolution
- TiAlNb based alloy