| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Ultrahigh Strength and Good Ductility Induced by Heterostructure in TC21 Alloy |
| Author(s) |
Z.H. Jiang, Yongfeng Shen, W.Y. Xue, N. Jia |
| On-Site Speaker (Planned) |
Yongfeng Shen |
| Abstract Scope |
Heterostructure of TC21 alloy was prepared via warm rolling and aging, containing primary α phase in equiaxed and lamellar forms, and dense αs phase precipitates in the β matrix. Thus, numerous αs/β interfaces were created. When the aging temperature increases 500 ℃ to 600 ℃, the content of α phase decreases from 43% to 39% and the proportion of LAGBs in the α phase significantly drops from 42% to 23%, while that in the β phase remains constant. The sample aged at 500 ℃ shows a superior combination of strength and ductility, with an ultrahigh yield strength of 1260 ± 10 MPa, ultimate tensile strength of 1550 ± 20 MPa, and ductility of 10.5 ± 0.3%. The significant increasing αs/β interfaces are important for improving the strength while the heterostructure-deformation-induced stress is as high as 670 MPa. This suggests that heterostructure has played a key role for the strengthening. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Characterization, Mechanical Properties |