| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XII
|
| Presentation Title |
Effect of Locally Beta-transformed Area on Fatigue Crack Propagation Resistance in a FSWed Ti-6Al-4V |
| Author(s) |
Masakazu Okazaki, Satoshi Hirano |
| On-Site Speaker (Planned) |
Masakazu Okazaki |
| Abstract Scope |
There are growing interest and potential application of FSW in fabricating titanium components in aerospace and space components. In the case of near alpha Ti-6Al-4V (Ti-6-4) alloy, a locally transformed area from hcp to beta structure are sometimes formed relating to the hot spot in temperature during the FSW process. The purposes of this research are to get basic knowledge on the above questions or dilemma, via exploration on the role of microstructure. Here special attention has been paid to the effect of the local beta-transformed microstructures. The experimental study demonstrated that the local fatigue crack propagation (FCP) rates in the stirred zone and near the interfacial zone were higher than those in the base metal by a few times. The local fatigue crack threshold level was also significantly affected. The local beta-transformed microstructure had undesirable effect on the FCP, not only in the longitudinal but in the transverse cracks. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Characterization, Titanium |