| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Defect Structures at Basal Twist Boundaries in Ti-6Al-4V |
| Author(s) |
Nadib Akram, Baris Yavas, Christopher Collins, Asa Frye, Vasisht Venkatesh, Adam Pilchak, David Furrer, Iuliana Cernatescu, Mark Aindow |
| On-Site Speaker (Planned) |
Nadib Akram |
| Abstract Scope |
Alpha/beta Ti alloys are unusually sensitive to early crack nucleation in cold dwell fatigue, but the origins of this behavior are not well understood. Recent studies have suggested that basal twist boundaries formed between suitably oriented primary alpha grains may play an important role in fatigue crack nucleation. Here we describe studies on the structural characteristics of such grain boundaries and the way in which they interact with deformation sub-structures. Cross-rolled Ti-6Al-4V plate material was used for the study since this process is known to produce some level of basal twist boundaries. A combination of scanning electron microscopy imaging and electron backscatter diffraction was used to locate the boundaries, and focused ion beam techniques were used to produce site-specific specimens for transmission electron microscopy. A comparison of defect structures at twist boundaries in undeformed and tested material revealed the way in which the deformation substructure develops at these locations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Characterization, |