Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents

Yanagihara, Soh; Ueki, Kosuke; Ueda, Kyosuke; Nakai, Masaaki; Nakano, Takayoshi; Narushima, Takayuki

doi:https://doi.org/10.1007/s11661-021-06374-7

Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents

Yanagihara, Soh; Ueki, Kosuke; Ueda, Kyosuke et al.

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2021, 52, 4137-4145

Number of Access:592（2025-08-21 04:37 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89772

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Title	Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents
Creator	CreatorName Yanagihara, Soh
	NRID 1000010845928 1000010845928 CreatorName Ueki, Kosuke
	NRID 1000040507901 1000040507901 CreatorName Ueda, Kyosuke
	NRID 1000020431603 1000020431603 CreatorName Nakai, Masaaki
	NRID 1000030243182 1000030243182 ORCID 0000-0001-8052-1698 0000-0001-8052-1698 researchmap permalink read0013987 read0013987 Scopus Author ID 7403896013 7403896013 CreatorName Nakano, Takayoshi
	NRID 1000020198394 1000020198394 CreatorName Narushima, Takayuki
Description	Yanagihara S., Ueki K., Ueda K., et al. Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 52, 9, 4137. https://doi.org/10.1007/s11661-021-06374-7.
Abstract	This is the first report presenting the development of a Co–Cr–W–Ni–Mn alloy by adding 6 mass pct Mn to ASTM F90 Co–20Cr–15W–10Ni (CCWN, mass pct) alloy for use as balloon-expandable stents with an excellent balance of mechanical properties and corrosion resistance. The effects of Mn addition on the microstructures as well as the mechanical and corrosion properties were investigated after hot forging, solution treatment, swaging, and static recrystallization. The Mn-added alloy with a grain size of ~ 20 µm (recrystallization condition: 1523 K, 150 seconds) exhibited an ultimate tensile strength of 1131 MPa, 0.2 pct proof stress of 535 MPa, and plastic elongation of 66 pct. Additionally, it exhibited higher ductility and lower yield stress while maintaining high strength compared to the ASTM F90 CCWN alloy. The formation of intersecting stacking faults was suppressed by increasing the stacking fault energy (SFE) with Mn addition, resulting in a lower yield stress. The low-yield stress is effective in suppressing stent recoil. In addition, strain-induced martensitic transformation during plastic deformation was suppressed by increasing the SFE, thereby improving the ductility. The Mn-added alloys also exhibited good corrosion resistance, similar to the ASTM F90 CCWN alloy. Mn-added Co–Cr–W–Ni alloys are suitable for use as balloon-expandable stents.
Publisher	Springer
Source Title	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume (Issue)	52
Page	4137-4145
Date of Issued	2021-07-07
Language	English
Handle URL	https://hdl.handle.net/11094/89772
PISSN	10735623
NCID	AA10987657
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1007/s11661-021-06374-7
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2021, 52, p. 4137-4145
DC.title	Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents
DC.creator	Yanagihara, Soh
	Ueki, Kosuke
	Ueda, Kyosuke
	Nakai, Masaaki
	Nakano, Takayoshi
	Narushima, Takayuki
DC.publisher	Springer
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2021-07-07
DC.identifier	https://doi.org/10.1007/s11661-021-06374-7
DC.description	Yanagihara S., Ueki K., Ueda K., et al. Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 52, 9, 4137. https://doi.org/10.1007/s11661-021-06374-7.
DCTERMS.abstract	This is the first report presenting the development of a Co–Cr–W–Ni–Mn alloy by adding 6 mass pct Mn to ASTM F90 Co–20Cr–15W–10Ni (CCWN, mass pct) alloy for use as balloon-expandable stents with an excellent balance of mechanical properties and corrosion resistance. The effects of Mn addition on the microstructures as well as the mechanical and corrosion properties were investigated after hot forging, solution treatment, swaging, and static recrystallization. The Mn-added alloy with a grain size of ~ 20 µm (recrystallization condition: 1523 K, 150 seconds) exhibited an ultimate tensile strength of 1131 MPa, 0.2 pct proof stress of 535 MPa, and plastic elongation of 66 pct. Additionally, it exhibited higher ductility and lower yield stress while maintaining high strength compared to the ASTM F90 CCWN alloy. The formation of intersecting stacking faults was suppressed by increasing the stacking fault energy (SFE) with Mn addition, resulting in a lower yield stress. The low-yield stress is effective in suppressing stent recoil. In addition, strain-induced martensitic transformation during plastic deformation was suppressed by increasing the SFE, thereby improving the ductility. The Mn-added alloys also exhibited good corrosion resistance, similar to the ASTM F90 CCWN alloy. Mn-added Co–Cr–W–Ni alloys are suitable for use as balloon-expandable stents.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	89772
citation_title	Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents
citation_author	Yanagihara, Soh
	Ueki, Kosuke
	Ueda, Kyosuke
	Nakai, Masaaki
	Nakano, Takayoshi
	Narushima, Takayuki
citation_publisher	Springer
citation_language	English
citation_date	2021-07-07
citation_journal_title	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
citation_volume	52
citation_firstpage	4137
citation_lastpage	4145
citation_doi	https://doi.org/10.1007/s11661-021-06374-7
citation_public_url	https://hdl.handle.net/11094/89772

Development of Low-Yield Stress Co–Cr–W–Ni Alloy by Adding 6 Mass Pct Mn for Balloon-Expandable Stents

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