Abstract
Mechanical property, phase composition and microstructure of high-strength high-toughness Ti-5321 titanium alloy treated by different cooling treatments (air cooling and water quenching) and aging treatments (solution and aging, direct aging and two-step aging) after α+β forging were studied by means of tensile test, X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). The results show that after solid solution and aging treatment, the microstructure of the alloy after air cooling and water quenching has no difference. The tensile strength and elongation of the alloy after water quenching and direct aging reach to 1239 MPa and 13%, respectively, which are comparable to those of solution and aging treated alloy. The plasticity of the alloy sharply decreases after water quenching and pre-aging, and significantly increases after two-step aging. The tensile properties of the alloy after air cooling are not obviously improved after direct aging or two-step aging.
| Translated title of the contribution | nfluence of high temperature thermo-mechanical treatment on structure and tensile properties of Ti5321 alloy |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 37-43 |
| Number of pages | 7 |
| Journal | Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment |
| Volume | 39 |
| Issue number | 4 |
| DOIs | |
| State | Published - 25 Apr 2018 |