| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Achieving High Yield Strength and Strain Hardening in a Strain Transformable Ti-Cr-Sn-Fe Based Beta-Ti Alloy |
| Author(s) |
Nachiket Keskar, Yolaine Danard, Srinivas Aditya Mantri, Lola Lilensten, Tirthesh Ingale, Abhishek Sharma, Fan Sun, Frederic Prima, Raj Banerjee |
| On-Site Speaker (Planned) |
Nachiket Keskar |
| Abstract Scope |
This study investigates the mechanical properties and deformation mechanisms of a Ti-7.5Cr-1Sn-1Fe (TCSF) strain transformable beta Ti alloy, highlighting its exceptional yield strength and work hardening rate. Combining the designed degree of beta phase metastability together with solid solution strengthening, a high yield strength (~800 MPa) has been achieved in this TCSF alloy. This alloy also exhibits a very high, yet controlled, strain hardening rate leading to ~30% uniform tensile elongation. This strain hardening can be attributed to the synergistic effects of the dynamic Hall-Petch effect, arising from deformation twinning (TWIP), and the formation of localized alpha” martensite phase at the twin/matrix interfaces, acting as a stress-relieving mechanism. Additional strain hardening mechanisms include accumulation of geometrically necessary dislocations (GNDs) at twin/matrix interfaces. These valuable insights into the strengthening and strain hardening mechanisms are crucial for the future application of this TCSF alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Phase Transformations, Mechanical Properties |