Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion

Todo, Tsubasa; Ishimoto, Takuya; Gokcekaya, Ozkan; Oh, Jongyeong; Nakano, Takayoshi

doi:https://doi.org/10.1016/j.scriptamat.2021.114252

Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion

Todo, Tsubasa; Ishimoto, Takuya; Gokcekaya, Ozkan et al.

Scripta Materialia, 2022, 206, 114252

Number of Access:424（2025-07-18 10:03 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89762

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Title	Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion
Creator	CreatorName Todo, Tsubasa
	NRID 1000050508835 1000050508835 ORCID 0000-0003-0081-0591 0000-0003-0081-0591 researchmap permalink i_taku i_taku Scopus Author ID 35310484700 35310484700 CreatorName Ishimoto, Takuya
	CreatorName Gokcekaya, Ozkan
	CreatorName Oh, Jongyeong
	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	Crystallographic texture
	Densification
	Laser powder bed fusion (LPBF)
	Simulation
	Tungsten
Description	Todo T., Ishimoto T., Gokcekaya O., et al. Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion. Scripta Materialia, 206, 114252. https://doi.org/10.1016/j.scriptamat.2021.114252.
Abstract	We successfully formed the first prominent crystallographic texture of tungsten using laser powder bed fusion (LPBF). It is difficult even to manufacture highly dense tungsten products using LPBF because of its extremely high melting point and high thermal conductivity. By tuning the laser process parameters, we succeeded in fabricating almost fully dense pure tungsten parts with a relative density of 99.1%, which is the highest value yet to be reported. More importantly, a single crystalline-like prominent crystallographic texture evolved, in which <011> preferentially oriented in the scanning direction. This texture was formed to reduce the crystal misorientation at the melt pool center, at which the solidification fronts from the right and left halves of the melt pool encounter. This texture formation mechanism is similar to that of conventional alloys with ordinary thermal properties; however, the crystal growth directionality that governs the crystallographic orientation differs according to the melt pool morphology.
Publisher	Acta Materialia Inc.
Source Title	Scripta Materialia
Volume (Issue)	206
Page	114252
Date of Issued	2022-01-01
Language	English
Handle URL	https://hdl.handle.net/11094/89762
PISSN	13596462
NCID	AA11067905
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1016/j.scriptamat.2021.114252
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	Scripta Materialia. 2022, 206, p. 114252
DC.title	Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion
DC.creator	Todo, Tsubasa
	Ishimoto, Takuya
	Gokcekaya, Ozkan
	Oh, Jongyeong
	Nakano, Takayoshi
DC.publisher	Acta Materialia Inc.
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2022-01-01
DC.identifier	https://doi.org/10.1016/j.scriptamat.2021.114252
DC.subject	Crystallographic texture
	Densification
	Laser powder bed fusion (LPBF)
	Simulation
	Tungsten
DC.description	Todo T., Ishimoto T., Gokcekaya O., et al. Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion. Scripta Materialia, 206, 114252. https://doi.org/10.1016/j.scriptamat.2021.114252.
DCTERMS.abstract	We successfully formed the first prominent crystallographic texture of tungsten using laser powder bed fusion (LPBF). It is difficult even to manufacture highly dense tungsten products using LPBF because of its extremely high melting point and high thermal conductivity. By tuning the laser process parameters, we succeeded in fabricating almost fully dense pure tungsten parts with a relative density of 99.1%, which is the highest value yet to be reported. More importantly, a single crystalline-like prominent crystallographic texture evolved, in which <011> preferentially oriented in the scanning direction. This texture was formed to reduce the crystal misorientation at the melt pool center, at which the solidification fronts from the right and left halves of the melt pool encounter. This texture formation mechanism is similar to that of conventional alloys with ordinary thermal properties; however, the crystal growth directionality that governs the crystallographic orientation differs according to the melt pool morphology.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	89762
citation_title	Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion
citation_author	Todo, Tsubasa
	Ishimoto, Takuya
	Gokcekaya, Ozkan
	Oh, Jongyeong
	Nakano, Takayoshi
citation_publisher	Acta Materialia Inc.
citation_language	English
citation_date	2022-01-01
citation_journal_title	Scripta Materialia
citation_volume	206
citation_firstpage	114252
citation_doi	https://doi.org/10.1016/j.scriptamat.2021.114252
citation_public_url	https://hdl.handle.net/11094/89762

Single crystalline-like crystallographic texture formation of pure tungsten through laser powder bed fusion

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