Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy

Sharma, Abhishek; Morisada, Yoshiaki; Ushioda, Kohsaku; Singh, Sukhdeep; Fujii, Hidetoshi

doi:https://doi.org/10.1016/j.msea.2025.148619

Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy

Sharma, Abhishek; Morisada, Yoshiaki; Ushioda, Kohsaku et al.

Materials Science and Engineering: A, 2025, 941, 148619

アクセス数:128件（2026-02-16 14:20 集計）

固定URL: https://hdl.handle.net/11094/102611

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タイトル	Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy
著者	NRID 1000050993705 1000050993705 ORCID 0000-0002-3384-861X 0000-0002-3384-861X researchmap permalink sharma_abhishek sharma_abhishek Scopus Author ID 57214356255 57214356255 著者名 Sharma, Abhishek
	NRID 1000000416356 1000000416356 researchmap permalink morisada morisada 著者名 Morisada, Yoshiaki
	著者名 Ushioda, Kohsaku
	著者名 Singh, Sukhdeep
	著者名 Fujii, Hidetoshi
キーワード等	Fracture
	Friction stir welding (FSW)
	Haynes 282
	Ni superalloy
	Precipitation strengthening
内容	Sharma A., Morisada Y., Ushioda K., et al. Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy. Materials Science and Engineering: A 941, 148619 (2025); https://doi.org/10.1016/j.msea.2025.148619.
抄録	This study investigates the joining of gamma prime (γ′)-strengthened Haynes® 282 (H282) Ni superalloy using Friction Stir Welding (FSW) with a novel hemispherical dome-shaped tool at different welding speeds. After post-welding heat treatment (PWHT), the stir zone (SZ) of the joints, regardless of welding speed, exhibited a tensile strength of approximately 1360 MPa, compared to the base metal strength (subjected to the same PWHT) of about 1144 MPa, resulting in a UTS-based joint efficiency of 100 %. The microstructural analysis identified primary Ti- and Mo-rich (MC) carbides, secondary Cr-rich (M₂₃C₆) carbides, and γ′ precipitates as key constituents within the austenitic γ matrix after PWHT. During FSW, the plastic deformation and material flow significantly altered the dispersion characteristics of brittle intergranular MC carbides, transforming them from an intergranular interconnected network (colonies) in the BM to discrete carbides that are randomly dispersed at the grain boundaries in the SZ. The increased strength of the SZ is attributed to this dispersion transformation, as the primary MC carbides are the preferential sites for the void nucleation during tensile loading. Increased welding speed led to reduced frictional heat input, resulting in finer grain size and increased local elongation while maintaining similar weld strength. Therefore, the microstructure of the H282 alloy is minimally impacted by the frictional heat input across various process parameters during FSW. This finding underscores the advantages of FSW for H282 alloy over other fusion welding techniques, where precise control of process parameters is crucial to prevent elemental segregation in the fusion zone.
出版者	Elsevier Ltd
収録物名	Materials Science and Engineering: A
巻(号)	941
ページ	148619
刊行年月	2025-06-05
言語	英語
ハンドルURL	https://hdl.handle.net/11094/102611
PISSN	09215093
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.msea.2025.148619
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. 148619
DC.title	Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy
DC.creator	Sharma, Abhishek
	Morisada, Yoshiaki
	Ushioda, Kohsaku
	Singh, Sukhdeep
	Fujii, Hidetoshi
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-06-05
DC.identifier	https://doi.org/10.1016/j.msea.2025.148619
DC.subject	Fracture
	Friction stir welding (FSW)
	Haynes 282
	Ni superalloy
	Precipitation strengthening
DC.description	Sharma A., Morisada Y., Ushioda K., et al. Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy. Materials Science and Engineering: A 941, 148619 (2025); https://doi.org/10.1016/j.msea.2025.148619.
DCTERMS.abstract	This study investigates the joining of gamma prime (γ′)-strengthened Haynes® 282 (H282) Ni superalloy using Friction Stir Welding (FSW) with a novel hemispherical dome-shaped tool at different welding speeds. After post-welding heat treatment (PWHT), the stir zone (SZ) of the joints, regardless of welding speed, exhibited a tensile strength of approximately 1360 MPa, compared to the base metal strength (subjected to the same PWHT) of about 1144 MPa, resulting in a UTS-based joint efficiency of 100 %. The microstructural analysis identified primary Ti- and Mo-rich (MC) carbides, secondary Cr-rich (M₂₃C₆) carbides, and γ′ precipitates as key constituents within the austenitic γ matrix after PWHT. During FSW, the plastic deformation and material flow significantly altered the dispersion characteristics of brittle intergranular MC carbides, transforming them from an intergranular interconnected network (colonies) in the BM to discrete carbides that are randomly dispersed at the grain boundaries in the SZ. The increased strength of the SZ is attributed to this dispersion transformation, as the primary MC carbides are the preferential sites for the void nucleation during tensile loading. Increased welding speed led to reduced frictional heat input, resulting in finer grain size and increased local elongation while maintaining similar weld strength. Therefore, the microstructure of the H282 alloy is minimally impacted by the frictional heat input across various process parameters during FSW. This finding underscores the advantages of FSW for H282 alloy over other fusion welding techniques, where precise control of process parameters is crucial to prevent elemental segregation in the fusion zone.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	102611
citation_title	Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy
citation_author	Sharma, Abhishek
	Morisada, Yoshiaki
	Ushioda, Kohsaku
	Singh, Sukhdeep
	Fujii, Hidetoshi
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2025-06-05
citation_journal_title	Materials Science and Engineering: A
citation_volume	941
citation_firstpage	148619
citation_doi	https://doi.org/10.1016/j.msea.2025.148619
citation_public_url	https://hdl.handle.net/11094/102611

Influence of welding speed on mechanical properties and fracture behaviour of friction stir welded Haynes® 282 Ni superalloy

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