Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion

Mizuno, Masataka; Sugita, Kazuki; Do, Kousuke; Ishimoto, Takuya; Nakano, Takayoshi; Araki, Hideki

doi:https://doi.org/10.1016/j.addlet.2023.100162

Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion

Mizuno, Masataka; Sugita, Kazuki; Do, Kousuke et al.

Additive Manufacturing Letters, 2023, 7, 100162

アクセス数:51件（2025-04-03 22:09 集計）

固定URL: https://hdl.handle.net/11094/93107

閲覧可能ファイル

ファイル	フォーマット	利用条件	サイズ	閲覧回数	利用開始日	説明	information
AdditManufLett_7	pdf	なし	2.42 MB	128	2023.11.14

Creative Commons : 表示

論文情報

ファイル出力 EndNote Basic出力 Mendeley出力

タイトル	Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion
著者	NRID 1000050324801 1000050324801 ORCID 0000-0002-7231-4469 0000-0002-7231-4469 researchmap permalink masataka_mizuno masataka_mizuno Scopus Author ID 7402730540 7402730540 著者名 Mizuno, Masataka
	NRID 1000030517470 1000030517470 著者名 Sugita, Kazuki
	著者名 Do, Kousuke
	NRID 1000050508835 1000050508835 ORCID 0000-0003-0081-0591 0000-0003-0081-0591 researchmap permalink i_taku i_taku Scopus Author ID 35310484700 35310484700 著者名 Ishimoto, Takuya
	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
	NRID 1000020202749 1000020202749 researchmap permalink HidekiARAKI HidekiARAKI Scopus Author ID 7201945633 7201945633 著者名 Araki, Hideki
キーワード等	Diffusion
	First-principles calculation
	Laser powder bed fusion
	Migration energy
	Ti alloys
	Vacancy formation energy
内容	Mizuno M., Sugita K., Do K., et al. Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion. Additive Manufacturing Letters 7, 100162 (2023); https://doi.org/10.1016/j.addlet.2023.100162.
抄録	The structural instability in the β-type titanium alloys could affect the stability of vacancies. The stability of vacancies in a β-type Ti-15Mo-5Zr-3Al alloy, fabricated via laser powder bed fusion (LPBF), was investigated using positron annihilation spectroscopy and first-principles calculations. The observed positron lifetimes were close to the experimental and calculated bulk lifetime of Ti-15Mo-5Zr-3Al, which indicates that vacancies were not detected in Ti-15Mo-5Zr-3Al by positron lifetime measurements. Therefore, for the first time, it has been confirmed that quenched-in vacancies are not introduced in the LPBF-manufactured β-type Ti-15Mo-5Zr-3Al despite the fast cooling rate in LPBF process. This feature is preferable for the structural stability in biomedical and industrial applications. The calculated atomic displacement from the ideal bcc lattice positions decreased in β-type Ti-Mo alloys with increasing Mo concentration, indicating that the bcc structure was stabilized by the added Mo. The calculated vacancy formation energies of Ti atoms in β-type Ti-14.5Mo and Ti-27.0Mo alloys exhibited an increasing trend with an increasing number of neighboring Mo atoms. Mo atoms also increased the migration energies of the neighboring paths of vacancies. The calculated results for Ti-15Mo-5Zr-3Al suggest that, while the bcc structure was stabilized by the Mo atoms in Ti-15Mo-5Zr-3Al, the migration and formation energies were still low enough for the diffusion of vacancies.
出版者	Elsevier B.V.
収録物名	Additive Manufacturing Letters
巻(号)	7
ページ	100162
刊行年月	2023-12-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/93107
eISSN	27723690
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.addlet.2023.100162
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
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Additive Manufacturing Letters. 2023, 7, p. 100162
DC.title	Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion
DC.creator	Mizuno, Masataka
	Sugita, Kazuki
	Do, Kousuke
	Ishimoto, Takuya
	Nakano, Takayoshi
	Araki, Hideki
DC.publisher	Elsevier B.V.
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-12-01
DC.identifier	https://doi.org/10.1016/j.addlet.2023.100162
DC.subject	Diffusion
	First-principles calculation
	Laser powder bed fusion
	Migration energy
	Ti alloys
	Vacancy formation energy
DC.description	Mizuno M., Sugita K., Do K., et al. Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion. Additive Manufacturing Letters 7, 100162 (2023); https://doi.org/10.1016/j.addlet.2023.100162.
DCTERMS.abstract	The structural instability in the β-type titanium alloys could affect the stability of vacancies. The stability of vacancies in a β-type Ti-15Mo-5Zr-3Al alloy, fabricated via laser powder bed fusion (LPBF), was investigated using positron annihilation spectroscopy and first-principles calculations. The observed positron lifetimes were close to the experimental and calculated bulk lifetime of Ti-15Mo-5Zr-3Al, which indicates that vacancies were not detected in Ti-15Mo-5Zr-3Al by positron lifetime measurements. Therefore, for the first time, it has been confirmed that quenched-in vacancies are not introduced in the LPBF-manufactured β-type Ti-15Mo-5Zr-3Al despite the fast cooling rate in LPBF process. This feature is preferable for the structural stability in biomedical and industrial applications. The calculated atomic displacement from the ideal bcc lattice positions decreased in β-type Ti-Mo alloys with increasing Mo concentration, indicating that the bcc structure was stabilized by the added Mo. The calculated vacancy formation energies of Ti atoms in β-type Ti-14.5Mo and Ti-27.0Mo alloys exhibited an increasing trend with an increasing number of neighboring Mo atoms. Mo atoms also increased the migration energies of the neighboring paths of vacancies. The calculated results for Ti-15Mo-5Zr-3Al suggest that, while the bcc structure was stabilized by the Mo atoms in Ti-15Mo-5Zr-3Al, the migration and formation energies were still low enough for the diffusion of vacancies.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	93107
citation_title	Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion
citation_author	Mizuno, Masataka
	Sugita, Kazuki
	Do, Kousuke
	Ishimoto, Takuya
	Nakano, Takayoshi
	Araki, Hideki
citation_publisher	Elsevier B.V.
citation_language	英語
citation_date	2023-12-01
citation_journal_title	Additive Manufacturing Letters
citation_volume	7
citation_firstpage	100162
citation_doi	https://doi.org/10.1016/j.addlet.2023.100162
citation_public_url	https://hdl.handle.net/11094/93107

Stability of vacancies in β-type Ti-15Mo-5Zr-3Al alloy fabricated via laser powder bed fusion

閲覧可能ファイル

論文情報

論文詳細を表示