Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study

Yamashita, Takayuki; Koga, Norimitsu; Wenqi, Mao; Gong, Wu; Kawasaki, Takuro; Harjo, Stefanus; Fujii, Hidetoshi; Umezawa, Osamu

doi:https://doi.org/10.1016/j.msea.2025.148602

Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study

Yamashita, Takayuki; Koga, Norimitsu; Wenqi, Mao et al.

Materials Science and Engineering: A, 2025, 941, 148602

アクセス数:13件（2025-09-11 12:38 集計）

固定URL: https://hdl.handle.net/11094/102608

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タイトル	Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study
著者	著者名 Yamashita, Takayuki
	NRID 1000030735923 1000030735923 著者名 Koga, Norimitsu
	著者名 Wenqi, Mao
	NRID 1000030780770 1000030780770 著者名 Gong, Wu
	NRID 1000020626361 1000020626361 著者名 Kawasaki, Takuro
	NRID 1000040391263 1000040391263 著者名 Harjo, Stefanus
	NRID 1000000247230 1000000247230 ORCID 0000-0002-5023-3844 0000-0002-5023-3844 researchmap permalink read0051741 read0051741 Scopus Author ID 7403071460 7403071460 著者名 Fujii, Hidetoshi
	NRID 1000020343171 1000020343171 著者名 Umezawa, Osamu
キーワード等	Duplex stainless steel
	Low temperature
	Neutron diffraction
	Stacking fault
	Stress partitioning
内容	Yamashita T., Koga N., Wenqi M., et al. Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study. Materials Science and Engineering: A 941, 148602 (2025); https://doi.org/10.1016/j.msea.2025.148602.
抄録	Ferrite-austenite duplex stainless steels exhibit excellent strength and ductility, making them attractive for applications in extreme environments. In this study, in situ neutron diffraction measurements were conducted during tensile testing at 293 K and 200 K to investigate stress partitioning and phase-specific deformation behavior at low temperatures. Phase stress was derived using a texture-compensated method to accurately evaluate stress partitioning and each phase's contribution to the overall strength. Regardless of temperature, ferrite exhibited higher phase stress than austenite, acting as the harder phase. At 200 K, both ferrite and austenite showed increased strength and work hardening, with austenite exhibiting significant stacking fault development in addition to dislocation migration. The plastic deformation mode of ferrite at 200 K was similar to that at 293 K, governed by dislocation migration, but it became more effective. The stress contributions of ferrite and austenite during plastic deformation were comparable at both temperatures. No martensitic transformation was observed in the tested temperature range. The combination of strengthening and enhanced work hardening in both phases contributed to the high strength of duplex stainless steel at 200 K while maintaining ductility comparable to that at 293 K.
出版者	Elsevier Ltd
収録物名	Materials Science and Engineering: A
巻(号)	941
ページ	148602
刊行年月	2025-06-02
言語	英語
ハンドルURL	https://hdl.handle.net/11094/102608
PISSN	09215093
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.msea.2025.148602
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 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	Materials Science and Engineering: A. 2025, 941, p. 148602
DC.title	Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study
DC.creator	Yamashita, Takayuki
	Koga, Norimitsu
	Wenqi, Mao
	Gong, Wu
	Kawasaki, Takuro
	Harjo, Stefanus
	Fujii, Hidetoshi
	Umezawa, Osamu
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-06-02
DC.identifier	https://doi.org/10.1016/j.msea.2025.148602
DC.subject	Duplex stainless steel
	Low temperature
	Neutron diffraction
	Stacking fault
	Stress partitioning
DC.description	Yamashita T., Koga N., Wenqi M., et al. Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study. Materials Science and Engineering: A 941, 148602 (2025); https://doi.org/10.1016/j.msea.2025.148602.
DCTERMS.abstract	Ferrite-austenite duplex stainless steels exhibit excellent strength and ductility, making them attractive for applications in extreme environments. In this study, in situ neutron diffraction measurements were conducted during tensile testing at 293 K and 200 K to investigate stress partitioning and phase-specific deformation behavior at low temperatures. Phase stress was derived using a texture-compensated method to accurately evaluate stress partitioning and each phase's contribution to the overall strength. Regardless of temperature, ferrite exhibited higher phase stress than austenite, acting as the harder phase. At 200 K, both ferrite and austenite showed increased strength and work hardening, with austenite exhibiting significant stacking fault development in addition to dislocation migration. The plastic deformation mode of ferrite at 200 K was similar to that at 293 K, governed by dislocation migration, but it became more effective. The stress contributions of ferrite and austenite during plastic deformation were comparable at both temperatures. No martensitic transformation was observed in the tested temperature range. The combination of strengthening and enhanced work hardening in both phases contributed to the high strength of duplex stainless steel at 200 K while maintaining ductility comparable to that at 293 K.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	102608
citation_title	Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study
citation_author	Yamashita, Takayuki
	Koga, Norimitsu
	Wenqi, Mao
	Gong, Wu
	Kawasaki, Takuro
	Harjo, Stefanus
	Fujii, Hidetoshi
	Umezawa, Osamu
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2025-06-02
citation_journal_title	Materials Science and Engineering: A
citation_volume	941
citation_firstpage	148602
citation_doi	https://doi.org/10.1016/j.msea.2025.148602
citation_public_url	https://hdl.handle.net/11094/102608

Enhanced work hardening in ferrite and austenite of duplex stainless steel at 200 K: In situ neutron diffraction study

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