Solidification microstructures of the ingots obtained by arc melting and cold crucible levitation melting in TiNbTaZr medium-entropy alloy and TiNbTaZrX (X = V, Mo, W) high-entropy alloys

Nagase, Takeshi; Mizuuchi, Kiyoshi; Nakano, Takayoshi

Entropy, 2019, 21(5), 483

Number of Access:526（2025-08-21 04:36 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89819

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Title
Solidification microstructures of the ingots obtained by arc melting and cold crucible levitation melting in TiNbTaZr medium-entropy alloy and TiNbTaZrX (X = V, Mo, W) high-entropy alloys
Creator
NRID
1000050362661 1000050362661
CreatorName
Nagase, Takeshi
NRID
1000060416344 1000060416344
CreatorName
Mizuuchi, Kiyoshi
NRID
1000030243182 1000030243182
ORCID
0000-0001-8052-1698 0000-0001-8052-1698
researchmap permalink
read0013987 read0013987
Scopus Author ID
7403896013 7403896013
CreatorName
Nakano, Takayoshi
Subject
Arc melting
Biomaterials
High-entropy alloy
Levitation melting
Microstructure
Solidification
Thermodynamic calculation
Description
Nagase T., Mizuuchi K., Nakano T.. Solidification microstructures of the ingots obtained by arc melting and cold crucible levitation melting in TiNbTaZr medium-entropy alloy and TiNbTaZrX (X = V, Mo, W) high-entropy alloys. Entropy, 21, 5, 483. https://doi.org/10.3390/e21050483.
Abstract
The solidification microstructures of the TiNbTaZr medium-entropy alloy and TiNbTaZrX (X = V, Mo, and W) high-entropy alloys (HEAs), including the TiNbTaZrMo bio-HEA, were investigated. Equiaxed dendrite structures were observed in the ingots that were prepared by arc melting, regardless of the position of the ingots and the alloy system. In addition, no significant difference in the solidification microstructure was observed in TiZrNbTaMo bio-HEAs between the arc-melted (AM) ingots and cold crucible levitation melted (CCLM) ingots. A cold shut was observed in theAMingots, but not in theCCLMingots. The interdendrite regions tended to be enriched in Ti and Zr in the TiNbTaZrMEAand TiNbTaZrX (X=V, Mo, and W) HEAs. The distribution coefficients during solidification, which were estimated by thermodynamic calculations, could explain the distribution of the constituent elements in the dendrite and interdendrite regions. The thermodynamic calculations indicated that an increase in the concentration of the low melting-temperature V (2183 K) leads to a monotonic decrease in the liquidus temperature (TL), and that increases in the concentration of high melting-temperature Mo (2896 K) and W (3695 K) lead to a monotonic increase in TL in TiNbTaZrXx (X = V, Mo, and W) (x = 0 - 2) HEAs.
Publisher
MDPI
Source Title
Entropy
Volume (Issue)
21(5)
Page
483
Date of Issued
2019-05-10
Language
English
Handle URL
https://hdl.handle.net/11094/89819
eISSN
10994300
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.3390/e21050483
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Category
学術雑誌論文 Journal Article