About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification X
|
| Presentation Title |
In Situ Observation of Dendritic Growth in Hexagonal Mg–Zn and Ti–Al Alloys to Determine Preferred Growth Directions |
| Author(s) |
Hideyuki Yasuda, Arisa Nishiguchi, Yuki Imoto, Teruya Hagiwara, Ryoji Katsube, Taka Narumi |
| On-Site Speaker (Planned) |
Hideyuki Yasuda |
| Abstract Scope |
Since the development of dendrite arms is closely related to the grain selection, and consequently the microstructure evolution, it is of interest to determine the preferred growth directions in hexagonal alloy systems such as Mg-Zn and Ti-Al alloys and to discuss the relationship between these growth directions and the lattice symmetry. To investigate the growth directions of dendrite arms, time-resolved and in situ observation using X-ray tomography and diffractometry (4D-CT+XRD) were performed on the Mg-Zn and the Ti-Al alloys at a beamline of BL47XU in SPring-8. The dendrite arms in the Mg-Zn alloys roughly grew along normal directions of {11-20} and {11-24} planes, although no growth was observed along the normal direction of {0001} plane. The Ti–Al alloys showed similar growth behavior. The growth directions clearly exhibited a six-fold symmetry along the c-axis, but the directions are somewhat flexible within the plane of (11-20) –(11-24). This paper presents the characterization of growth directions for the hexagonal alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Magnesium, Titanium |