Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion

Kim, Yong Seong; Gokcekaya, Ozkan; Matsugaki, Aira et al.

Materialia, 2024, 38, 102241

Number of Access:744（2025-07-27 15:53 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/98582

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Title
Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion
Creator
CreatorName
Kim, Yong Seong
NRID
1000050988160 1000050988160
ORCID
0000-0002-9258-858X 0000-0002-9258-858X
Scopus Author ID
37051975500 37051975500
CreatorName
Gokcekaya, Ozkan
NRID
1000010592529 1000010592529
ORCID
0000-0002-8427-7124 0000-0002-8427-7124
researchmap permalink
aira aira
Scopus Author ID
24172720900 24172720900
CreatorName
Matsugaki, Aira
NRID
1000080845347 1000080845347
ORCID
0000-0002-2773-072X 0000-0002-2773-072X
researchmap permalink
ozasa_r ozasa_r
Scopus Author ID
56202812400 56202812400
CreatorName
Ozasa, Ryosuke
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
Additive manufacturing
Cracking
High entropy alloys
In-situ alloying
Segregation
Description
Kim Y.S., Gokcekaya O., Matsugaki A., et al. Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion. Materialia 38, 102241 (2024); https://doi.org/10.1016/j.mtla.2024.102241.
Abstract
Pre-alloyed powder, which is primarily used in laser powder bed fusion (LPBF), has the disadvantages of requiring time and high manufacturing costs. To overcome these limitations, in-situ alloying, which mixes pure elemental powders and alloys them in real-time during the LPBF process, has attracted attention. In particular, manufacturing high entropy alloys (HEA) containing high-melting-point refractory elements through in-situ alloying presents considerable challenges. In this study, a non-equiatomic single body-centered cubic (BCC) solid-solution HEA was fabricated via in-situ alloying with Ti, Nb, Mo, Ta, and W powders through the LPBF process. Specifically, by applying a high volumetric energy density (VED), we successfully mitigated the segregation of constituent elements, leading to an enhanced crystallographic texture. Consequently, the reduction in the residual stress and high-angle grain boundary (HAGB) density progressed, contributing to an increased relative density. Thus, this study marks a pioneering endeavor for in-situ alloyed HEA fabrication via LPBF, illustrating the efficacy of in-situ alloying utilizing mixed powders.
Publisher
Elsevier B.V.
Source Title
Materialia
Volume (Issue)
38
Page
102241
Date of Issued
2024-12-01
Language
English
Handle URL
https://hdl.handle.net/11094/98582
eISSN
25891529
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1016/j.mtla.2024.102241
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article