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; Ozasa, Ryosuke; Nakano, Takayoshi

doi:https://doi.org/10.1016/j.mtla.2024.102241

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

アクセス数:28件（2025-04-03 22:22 集計）

固定URL: https://hdl.handle.net/11094/98582

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タイトル	Laser energy-dependent processability of non-equiatomic TiNbMoTaW high-entropy alloy through in-situ alloying of elemental feedstock powders by laser powder bed fusion
著者	著者名 Kim, Yong Seong
	NRID 1000050988160 1000050988160 ORCID 0000-0002-9258-858X 0000-0002-9258-858X Scopus Author ID 37051975500 37051975500 著者名 Gokcekaya, Ozkan
	NRID 1000010592529 1000010592529 ORCID 0000-0002-8427-7124 0000-0002-8427-7124 researchmap permalink aira aira Scopus Author ID 24172720900 24172720900 著者名 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 著者名 Ozasa, Ryosuke
	NRID 1000030243182 1000030243182 ORCID 0000-0001-8052-1698 0000-0001-8052-1698 researchmap permalink read0013987 read0013987 Scopus Author ID 7403896013 7403896013 著者名 Nakano, Takayoshi
キーワード等	Additive manufacturing
	Cracking
	High entropy alloys
	In-situ alloying
	Segregation
内容	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.
抄録	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.
出版者	Elsevier B.V.
収録物名	Materialia
巻(号)	38
ページ	102241
刊行年月	2024-12-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/98582
eISSN	25891529
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.mtla.2024.102241
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Materialia. 2024, 38, p. 102241
DC.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
DC.creator	Kim, Yong Seong
	Gokcekaya, Ozkan
	Matsugaki, Aira
	Ozasa, Ryosuke
	Nakano, Takayoshi
DC.publisher	Elsevier B.V.
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-12-01
DC.identifier	https://doi.org/10.1016/j.mtla.2024.102241
DC.subject	Additive manufacturing
	Cracking
	High entropy alloys
	In-situ alloying
	Segregation
DC.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.
DCTERMS.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.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	98582
citation_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
citation_author	Kim, Yong Seong
	Gokcekaya, Ozkan
	Matsugaki, Aira
	Ozasa, Ryosuke
	Nakano, Takayoshi
citation_publisher	Elsevier B.V.
citation_language	英語
citation_date	2024-12-01
citation_journal_title	Materialia
citation_volume	38
citation_firstpage	102241
citation_doi	https://doi.org/10.1016/j.mtla.2024.102241
citation_public_url	https://hdl.handle.net/11094/98582

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

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