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Time invariance of three-dimensional morphology of equiaxed dendrite: A phase-field study
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| Title: | Time invariance of three-dimensional morphology of equiaxed dendrite: A phase-field study |
| Authors: | Yamada, Ryo Browse this author →KAKEN DB | | Kudo, Mikihiro Browse this author | | Kim, Geunwoo Browse this author | | Takaki, Tomohiro Browse this author | | Shibuta, Yasushi Browse this author | | Ohno, Munekazu Browse this author →KAKEN DB |
| Keywords: | Solidification | | Equiaxed dendrite | | Phase-field model | | Time invariance |
| Issue Date: | Mar-2022 |
| Publisher: | Elsevier |
| Journal Title: | Computational materials science |
| Volume: | 204 |
| Start Page: | 111173 |
| Publisher DOI: | 10.1016/j.commatsci.2021.111173 |
| Abstract: | Dendrite morphology has a significant effect on solute segregation and fluid flow in bulk metallic materials. Therefore, the detailed morphological evolution of dendrites is important to better understand these processes. Recently, three-dimensional (3D) dendrite morphology has been analyzed using interface shape distribution (ISD) maps that are spanned by the curvedness and shape factor of the local solid-liquid interface in an Al-Cu alloy. Data were collected through in-situ observations using synchrotron radiation imaging techniques [J.W. Gibbs et al.: Sci. Rep., 5 (2015) 11824]. This methodology is quite effective for describing 3D dendrites. In this study, we thoroughly investigated the morphological evolution and the related ISD map of free-growing equiaxed dendrites in an Al-3mass%Cu alloy using a quantitative phase-field model. The ISD was found to differ depending on the degree of undercooling. Importantly, the results indicate the presence of a time-invariant feature after sufficient branching and growth of secondary arms, when the degree of undercooling is substantial enough to produce a bunch of branching. The time invariance is considered a universal feature of equiaxed dendrite growth. |
| Rights: | ©2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/91033 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 大野 宗一
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