Characterization of Growing Dendrites in CrMnFeCoNi High-Entropy Alloy by Time-Resolved and <i>In-Situ</i> Tomography
-
- Nakano Keita
- Department of Materials Science and Engineering, Kyoto University
-
- Narumi Taka
- Department of Materials Science and Engineering, Kyoto University
-
- Morishita Kohei
- Department of Materials Science and Engineering, Kyoto University
-
- Yasuda Hideyuki
- Department of Materials Science and Engineering, Kyoto University
Bibliographic Information
- Other Title
-
- Characterization of Growing Dendrites in CrMnFeCoNi High-Entropy Alloy by Time-Resolved and In-Situ Tomography
Search this article
Abstract
<p>Time-resolved tomography (4D-CT) and X-ray diffraction (XRD) were combined to observe growing dendrites and to measure their crystallographic orientation in a CrMnFeCoNi high-entropy alloy with an FCC structure. The evolution of the dendritic grains cooling at 0.083 K/s was reconstructed using 200 projections over a 180° rotation every 4 s from 4D-CT and a phase field filter. The voxel size was a 6.5-µm cube. Simultaneously, the crystallographic orientations of the dendritic grains were measured by XRD. The dendrite arms grew preferentially along the 〈100〉 direction, corresponding with typical FCC alloys. The specific solid–liquid interfacial area, which was normalized by the total volume, was evaluated as a function of solid fraction. The interfacial area reached a maximum at a solid fraction of 0.55. The interfacial area was compatible with the reported values of Al–Cu and Mg–Sn alloys. The secondary arm spacing was on the same order of magnitude as the spacing of conventional alloys. Overall, it appears that solidification in this high-entropy alloy can be analyzed by using models developed for binary or pseudo-binary alloys.</p>
Journal
-
- MATERIALS TRANSACTIONS
-
MATERIALS TRANSACTIONS 61 (4), 596-604, 2020-04-01
The Japan Institute of Metals and Materials
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390565134839720576
-
- NII Article ID
- 130007815364
-
- NII Book ID
- AA1151294X
-
- ISSN
- 13475320
- 13459678
-
- NDL BIB ID
- 030344558
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
-
- Abstract License Flag
- Disallowed