Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry

Takase, Aya; Ishimoto, Takuya; Suganuma, Ryoya; Nakano, Takayoshi

doi:https://doi.org/10.1016/j.scriptamat.2021.113953

Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry

Takase, Aya; Ishimoto, Takuya; Suganuma, Ryoya et al.

Scripta Materialia, 2021, 201, 113953

アクセス数:131件（2025-04-06 05:54 集計）

固定URL: https://hdl.handle.net/11094/89777

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タイトル	Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry
著者	著者名 Takase, Aya
	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
	著者名 Suganuma, Ryoya
	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	Crystal structure
	Residual stresses
	Selective laser melting (SLM)
	X-ray diffraction (XRD)
	β-type titanium alloys
内容	Takase A., Ishimoto T., Suganuma R., et al. Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry. Scripta Materialia, 201, 113953. https://doi.org/10.1016/j.scriptamat.2021.113953.
抄録	A peculiar lattice distortion in a selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al was observed for the first time, through high-precision X-ray diffraction (XRD) analyses. After SLM, Ti-15Mo-5Zr-3Al exhibited a body-centered-tetragonal structure instead of a body-centered-cubic structure; the c-axis was 0.63% shorter than the a-axis. The XRD analyses also revealed tensile residual stresses of 210 ± 12 MPa at the specimen surface. A numerical simulation indicated rapid cooling during the SLM, which could have caused the residual stresses. A comparison of the partially stress-released SLM specimen and an electron beam melting-manufactured specimen with negligible residual stress suggested that the residual stress caused by the rapid cooling in SLM induced the lattice distortion. This finding is not consistent with the previous understanding that residual stress changes the lattice parameter without lattice distortion. This study provides new insight into lattice distortion generated by a combination of SLM-specific ultrarapid cooling and unstable phases.
出版者	Acta Materialia Inc.
収録物名	Scripta Materialia
巻(号)	201
ページ	113953
刊行年月	2021-08-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/89777
PISSN	13596462
NCID	AA11067905
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.scriptamat.2021.113953
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

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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	Scripta Materialia. 2021, 201, p. 113953
DC.title	Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry
DC.creator	Takase, Aya
	Ishimoto, Takuya
	Suganuma, Ryoya
	Nakano, Takayoshi
DC.publisher	Acta Materialia Inc.
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2021-08-01
DC.identifier	https://doi.org/10.1016/j.scriptamat.2021.113953
DC.subject	Crystal structure
	Residual stresses
	Selective laser melting (SLM)
	X-ray diffraction (XRD)
	β-type titanium alloys
DC.description	Takase A., Ishimoto T., Suganuma R., et al. Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry. Scripta Materialia, 201, 113953. https://doi.org/10.1016/j.scriptamat.2021.113953.
DCTERMS.abstract	A peculiar lattice distortion in a selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al was observed for the first time, through high-precision X-ray diffraction (XRD) analyses. After SLM, Ti-15Mo-5Zr-3Al exhibited a body-centered-tetragonal structure instead of a body-centered-cubic structure; the c-axis was 0.63% shorter than the a-axis. The XRD analyses also revealed tensile residual stresses of 210 ± 12 MPa at the specimen surface. A numerical simulation indicated rapid cooling during the SLM, which could have caused the residual stresses. A comparison of the partially stress-released SLM specimen and an electron beam melting-manufactured specimen with negligible residual stress suggested that the residual stress caused by the rapid cooling in SLM induced the lattice distortion. This finding is not consistent with the previous understanding that residual stress changes the lattice parameter without lattice distortion. This study provides new insight into lattice distortion generated by a combination of SLM-specific ultrarapid cooling and unstable phases.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	89777
citation_title	Lattice distortion in selective laser melting (SLM)-manufactured unstable β-type Ti-15Mo-5Zr-3Al alloy analyzed by high-precision X-ray diffractometry
citation_author	Takase, Aya
	Ishimoto, Takuya
	Suganuma, Ryoya
	Nakano, Takayoshi
citation_publisher	Acta Materialia Inc.
citation_language	英語
citation_date	2021-08-01
citation_journal_title	Scripta Materialia
citation_volume	201
citation_firstpage	113953
citation_doi	https://doi.org/10.1016/j.scriptamat.2021.113953
citation_public_url	https://hdl.handle.net/11094/89777