About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Phenomenology and Mechanisms of Room Temperature Creep in Ti Alloys |
| Author(s) |
Raineesh Babu Kizhakkath Parambil, Praveen Kumar |
| On-Site Speaker (Planned) |
Raineesh Babu Kizhakkath Parambil |
| Abstract Scope |
Room temperature (RT) creep in titanium alloys, despite its extremely low strain rates and exhaustion-type behavior, plays a critical role in dwell fatigue. It is associated with a significant reduction in fatigue life—often by an order of magnitude. This study investigates RT creep in titanium alloys at both phenomenological and mechanistic levels, with Ti-6242 as the primary system. Constant strain rate tests across multiple strain rates and creep tests below the macroscopic yield strength were conducted. The strain hardening exponent was initially low, increased with plastic strain, and then saturated. The creep response was found to depend on the plastic strain accumulated during loading. Slip trace analysis combined with EBSD revealed similar slip systems active during both deformation modes. A unified phenomenological model was developed that captures both behaviors, incorporating evolving strain hardening and loading strain effects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Mechanical Properties, |