About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
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| Presentation Title |
Dendrite Growth Observation of the Ni-Based System Using In-Situ Synchrotron Imaging |
| Author(s) |
Won Sang Shin, Dae-yoon Kim, Min-Seo Kim, Jae-Won You, Yoo-Seok Kim, Jun-Pyo Park, Myung Gwan Hahm, Yoon-Jun Kim |
| On-Site Speaker (Planned) |
Yoon-Jun Kim |
| Abstract Scope |
The conventional optical microscopy approach for in-situ observation of metallic solidification faces limitations due to high solidification temperatures and the opacity of solid metal. To address this, our study developed an innovative in-situ imaging technique utilizing a white X-ray source generated from the synchrotron beam line at the Pohang Accelerator Laboratory in Korea. In-situ observation performed using a high-temperature furnace operated at a temperature of 1600°C until the specimen was fully melted under a vacuum pressure of 10-3 torr. Subsequently, controlled cooling was achieved by adjusting the current through carbon heaters from -0.2 to -0.8 A/min. Dendrite structure parameters such as tip radius, arm spacing, and mushy zone length, as a function of cooling rates were measured directly from the in-situ images. To correlate dendrite growth behavior with microstructure, we further analyzed the microstructural properties using optical and electron microscopies, as well as atom probe tomography. |
| Proceedings Inclusion? |
Planned: |