Nucleation of equiaxed δ-ferrite grain by Oxide + TiN to improve tensile properties of ferritic stainless steel welds

Hou, Yuyang; Kadoi, Kota

Materials Characterization, 2025, 227, 115270

アクセス数:5件（2025-08-14 17:34 集計）

固定URL: https://hdl.handle.net/11094/102464

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論文情報

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タイトル
Nucleation of equiaxed δ-ferrite grain by Oxide + TiN to improve tensile properties of ferritic stainless steel welds
著者
NRID
1000060905933 1000060905933
著者名
Hou, Yuyang
NRID
1000040454029 1000040454029
researchmap permalink
read0136312 read0136312
Scopus Author ID
22979603200 22979603200
ORCID
0000-0001-7011-751X 0000-0001-7011-751X
著者名
Kadoi, Kota
キーワード等
CET
Equiaxed grain
Nucleation
Stainless steel
Welding
内容
Hou Y., Kadoi K.. Nucleation of equiaxed δ-ferrite grain by Oxide + TiN to improve tensile properties of ferritic stainless steel welds. Materials Characterization 227, 115270 (2025); https://doi.org/10.1016/j.matchar.2025.115270.
抄録
This study investigated the tensile properties of ferritic stainless steel welds with Oxide+TiN and the crystal orientation relationship between oxides and TiN. It revealed that the ultimate tensile strength and elongation were improved by 15 % and 50 % in the equiaxed specimen nucleated by Oxide+TiN, respectively. The formation of TiN was accelerated on the oxides Ti₂O₃, Al₂O₃, Al₂Ti₇O₁₅, and MgAl₂O₄ for elucidating the δ-ferrite nucleation. Ti₂O₃ and Al₂O₃ exhibited {0001}oxide // {111}TiN and [1010]oxide // [110]TiN orientations, resulting in misfits of 0.6 % and 8.1 % with TiN, respectively. MgAl₂O₄ was fully parallel to TiN in all crystal orientations and exhibited a misfit of 4.8 % with TiN. Al₂Ti₇O₁₅ was newly discovered as a nucleation site for TiN, attributed to a 3.6 % misfit in the orientation relationships of {204}Al₂Ti₇O₁₅ // {002}TiN, [20−1]Al₂Ti₇O₁₅ // [1−10]TiN, and [020]Al₂Ti₇O₁₅ // [220]TiN. The brittle to ductile transition of the tensile fracture was promoted by formation of equiaxed grain, which greatly random the slip system for larger intragranular deformation.
出版者
Elsevier Inc.
収録物名
Materials Characterization
巻(号)
227
ページ
115270
刊行年月
2025-06-11
言語
英語
ハンドルURL
https://hdl.handle.net/11094/102464
PISSN
10445803
関連情報 (isVersionOf)
DOI (出版社版)
https://doi.org/10.1016/j.matchar.2025.115270
アクセス権
embargoed access
権利情報
© 2025. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/.
The full-text file will be made open to the public on 11 June 2027 in accordance with the publisher's policy.
出版タイプ
Accepted Manuscript
カテゴリ
学術雑誌論文 Journal Article