Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography

Sato, Kazuhisa; Tashiro, Shunya; Matsunaga, Shuhei; Yamaguchi, Yohei; Kiguchi, Takanori; Konno, Toyohiko J.

doi:https://doi.org/10.1080/14786435.2018.1468940

Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography

Sato, Kazuhisa; Tashiro, Shunya; Matsunaga, Shuhei et al.

Philosophical Magazine, 2018, 98(21), 1945-1960

アクセス数:42件（2025-04-27 18:04 集計）

固定URL: https://hdl.handle.net/11094/97375

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タイトル	Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography
著者	NRID 1000070314424 1000070314424 ORCID 0000-0001-9078-2541 0000-0001-9078-2541 researchmap permalink read0158304 read0158304 Scopus Author ID 55552977400 55552977400 著者名 Sato, Kazuhisa
	著者名 Tashiro, Shunya
	著者名 Matsunaga, Shuhei
	NRID 1000040448098 1000040448098 ORCID 0000-0001-6794-5939 0000-0001-6794-5939 researchmap permalink read0140668 read0140668 Scopus Author ID 8638124400 8638124400 著者名 Yamaguchi, Yohei
	NRID 1000070311660 1000070311660 著者名 Kiguchi, Takanori
	NRID 1000090260447 1000090260447 著者名 Konno, Toyohiko J.
キーワード等	electron tomography
	lateral morphology
	Long-period stacking order (LPSO)
	magnesium alloys
	scanning transmission electron microscopy (STEM)
内容	This is an Accepted Manuscript an article published by Taylor & Francis in Philosophical Magazine on 23 July 2018, available at https://doi.org/10.1080/14786435.2018.1468940.
抄録	We have studied three-dimensional (3D) structures and growth processes of 14H-type long-period stacking order (LPSO) formed in Mg₉₇Zn₁Gd₂ cast alloys by single tilt-axis electron tomography (ET) using high-angle annular dark-field scanning transmission electron microscopy. Evolution of the solute-enriched stacking faults (SFs) and the 14H LPSO by ageing were visualised in 3D with a high spatial resolution in multi-scale fields of views from a few nanometres to ~10 μm. Lateral growth of the solute-enriched SFs and the LPSO in the (0 0 0 1)ᴍ𝚐 plane is notable compared to the out-of-plane growth in the [0 0 0 1]ᴍ𝚐 direction. The 14H LPSO grows at the cost of decomposition of the (Mg, Zn)₃Gd-type precipitates, and accompany a change of in-plane edge angles from 30 to 60°. We have updated the Time–Temperature–Transformation diagram for precipitation in Mg₉₇Zn₁Gd₂ alloys: starting temperatures of both solute-enriched SFs and LPSO formation shifted to a shorter time side than those in the previous diagram.
出版者	Taylor and Francis Ltd
収録物名	Philosophical Magazine
巻(号)	98(21)
ページ	1945-1960
刊行年月	2018-07-23
言語	英語
ハンドルURL	https://hdl.handle.net/11094/97375
PISSN	14786435
eISSN	14786443
関連情報 (isVersionOf)	DOI (出版社版) https://doi.org/10.1080/14786435.2018.1468940
アクセス権	open access
権利情報	© 2018 Informa UK Limited, trading as Taylor & Francis Group.
出版タイプ	Accepted Manuscript
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
DCTERMS.bibliographicCitation	Philosophical Magazine. 2018, 98(21), p. 1945-1960
DC.title	Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography
DC.creator	Sato, Kazuhisa
	Tashiro, Shunya
	Matsunaga, Shuhei
	Yamaguchi, Yohei
	Kiguchi, Takanori
	Konno, Toyohiko J.
DC.publisher	Taylor and Francis Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2018-07-23
DC.identifier	https://doi.org/10.1080/14786435.2018.1468940
DC.subject	electron tomography
	lateral morphology
	Long-period stacking order (LPSO)
	magnesium alloys
	scanning transmission electron microscopy (STEM)
DC.description	This is an Accepted Manuscript an article published by Taylor & Francis in Philosophical Magazine on 23 July 2018, available at https://doi.org/10.1080/14786435.2018.1468940.
DCTERMS.abstract	We have studied three-dimensional (3D) structures and growth processes of 14H-type long-period stacking order (LPSO) formed in Mg₉₇Zn₁Gd₂ cast alloys by single tilt-axis electron tomography (ET) using high-angle annular dark-field scanning transmission electron microscopy. Evolution of the solute-enriched stacking faults (SFs) and the 14H LPSO by ageing were visualised in 3D with a high spatial resolution in multi-scale fields of views from a few nanometres to ~10 μm. Lateral growth of the solute-enriched SFs and the LPSO in the (0 0 0 1)ᴍ𝚐 plane is notable compared to the out-of-plane growth in the [0 0 0 1]ᴍ𝚐 direction. The 14H LPSO grows at the cost of decomposition of the (Mg, Zn)₃Gd-type precipitates, and accompany a change of in-plane edge angles from 30 to 60°. We have updated the Time–Temperature–Transformation diagram for precipitation in Mg₉₇Zn₁Gd₂ alloys: starting temperatures of both solute-enriched SFs and LPSO formation shifted to a shorter time side than those in the previous diagram.
DC.rights	© 2018 Informa UK Limited, trading as Taylor & Francis Group.
DC.format	97375
citation_title	Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography
citation_author	Sato, Kazuhisa
	Tashiro, Shunya
	Matsunaga, Shuhei
	Yamaguchi, Yohei
	Kiguchi, Takanori
	Konno, Toyohiko J.
citation_publisher	Taylor and Francis Ltd
citation_language	英語
citation_date	2018-07-23
citation_journal_title	Philosophical Magazine
citation_volume	98
citation_issue	21
citation_firstpage	1945
citation_lastpage	1960
citation_doi	https://doi.org/10.1080/14786435.2018.1468940
citation_public_url	https://hdl.handle.net/11094/97375

Evolution of long-period stacking order (LPSO) in Mg₉₇Zn₁Gd₂ cast alloys viewed by HAADF-STEM multi-scale electron tomography

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