| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Hydrogen Impact on Cyclic Behaviour of Pure Alpha Titanium Alloy |
| Author(s) |
Larissa Martins Moreira, Abdelali Oudriss, Aude Mathis, Cyril Berziou, Guillaume Lotte, Jamaa Bouhattate, Simon Frappart, Stéphane Cohendoz, Thierry Millot, Xavier Feaugas |
| On-Site Speaker (Planned) |
Xavier Feaugas |
| Abstract Scope |
The impact of hydrogen on the low cycle fatigue behavior of T40 is investigated at room temperature. The mechanical behavior could be divided into three stages and related in terms of hydrogen concentrations, types of hydrides and their influence on mechanical properties. Different morphologies of hydrides, γ, and δ-hydrides and the formation of defects and dislocations patterns, have been studied using transmission electron microscopy (TEM) to explain the evolution of internal stresses. It revealed that the physical effect of hardening or softening on the effective stresses and back stress depends on the hydrogen content and its location (hydride or in interstitial solid solution). The relationship between microstructural observations and mechanical results is then discussed to understand the origin of softening and hardening as well as the mechanisms of crack initiation and propagation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Titanium, Phase Transformations |