| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Effect of β Phase Fraction on Hydrogen Embrittlement in α+β Titanium Alloys |
| Author(s) |
Lucia Chen, Zhenbo Zhang, Philip Platt, Patrick Burr, Michael Preuss |
| On-Site Speaker (Planned) |
Lucia Chen |
| Abstract Scope |
We propose a novel method of mitigating hydrogen embrittlement in α+β titanium alloys: the β phase is known to act as an effective hydrogen trap, and by mechanically constraining it at grain boundary triple-points, we propose that it will embrittles with minimal degradation of the bulk mechanical properties of the alloy. We consider two alloys, Ti-64 and Ti-575, with comparable microstructures but different β phase volume fractions due to differing Al and V contents. Both alloys were charged with hydrogen to levels of 100 to 10 000 ppm and heat treated to redistribute the hydrogen. Initial tensile testing and fractography analysis provided evidence that despite being a higher strength alloy, Ti-575 was less susceptible to hydrogen embrittlement. The ductility loss was correlated with distinct differences in failure modes and hydride formation: Ti-64 shows more pronounced hydride formation, and interfacial cracking, than Ti-575 at comparable hydrogen levels, particularly at interphase boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, |