| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
In situ Study of Room Temperature Hydride Formation in Ti6Al4V and its Effect on Damage Mechanisms |
| Author(s) |
Jinwoo Kim, C. Cem Tasan |
| On-Site Speaker (Planned) |
Jinwoo Kim |
| Abstract Scope |
Hydride formation is a well-known cause for brittle fracture of Ti alloys in hydrogen environment. In this study, we investigate hydride formation in a bimodal Ti6Al4V alloy at room temperature using a novel in situ hydrogen-charging technique for scanning electron microscope and synchrotron X-ray diffraction. The combined employment of these in situ techniques enables the investigation of multi-scale effects of H in the two present phases in this alloys, which are otherwise difficult to be visualized. The real-time imaging and lattice strain analysis by the in situ techniques show that the growth of a fct-type hydride phase at phase boundaries is significantly affected by volumetric expansion of adjacent β-H solid solution phase. The results also suggest how the volumetric expansion of hydride and β-phase forms local strain in surrounding α-phase and eventually influence the damage mechanism of the alloy. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |