Significance of fracture toughness for linear friction welded joint of weathering steel

Shimizu, Kazuma; Nakayama, Shota; Shoji, Hiroto et al.

Welding in the World, 2025, 69, 739-750

アクセス数:576件（2025-07-26 22:07 集計）

固定URL: https://hdl.handle.net/11094/100315

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タイトル
Significance of fracture toughness for linear friction welded joint of weathering steel
著者
NRID
1000060925527 1000060925527
researchmap permalink
kazumashimizu kazumashimizu
Scopus Author ID
57212565111 57212565111
著者名
Shimizu, Kazuma
著者名
Nakayama, Shota
NRID
1000020800791 1000020800791
researchmap permalink
h-shoji h-shoji
Scopus Author ID
55872630000 55872630000
著者名
Shoji, Hiroto
著者名
Kawakubo, Takumi
NRID
1000000379124 1000000379124
著者名
Nagira, Tomoya
NRID
1000020294027 1000020294027
researchmap permalink
read0051693 read0051693
Scopus Author ID
7102452670 7102452670
著者名
Ohata, Mitsuru
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
キーワード等
Fracture toughness
Linear friction weld
Plastic constraint
Strength mismatch
内容
The version of record of this article, first published in Welding in the World, is available online at Publisher’s website: https://doi.org/10.1007/s40194-024-01890-7.
抄録
This paper examined the characteristics and significance of fracture toughness for LFW (linear friction welding) joints of weathering steel SPA-H processed under different joining conditions to control maximum temperature during LFW process. Two types of LFW joint were prepared; one was jointed under higher compressive pressure so as a maximum temperature during LFW process to be lower than the A1-transformation temperature (A1-LFW), and the other was jointed under lower compressive pressure to be higher than the A3-transformation temperature (A3-LFW). The fracture toughness of both joints where a crack was located at the joint interface exhibited a higher value than that of the heat-affected zone of MAG (metal active gas) welds for the same steel. These results indicated that the LFW was more effective for the joining of weathering steel compared with conventional arc welding in terms of fracture toughness. However, A1-LFW exhibited lower fracture toughness (critical CTOD) than that of base metal or A3-LFW. Thus, the significance of the test results was discussed from mechanical and metallurgical viewpoints. The fracture toughness for A1-LFW found to be deteriorated due to work hardening associated with compressive plastic straining during LFW under higher compressive pressure, where the metal heated under A1-temperature was not completely ejected by friction but remained around the joint interface. On the other hand, the deterioration of fracture toughness for A3-LFW was found to be caused by hardening due to bainitic transformation near the joint interface, whereas the narrowness of the hardened region provided a little bit higher toughness than the intrinsic toughness of the transformed phase due to plastic constraint loss.
出版者
Springer Science and Business Media Deutschland GmbH
収録物名
Welding in the World
巻(号)
69
ページ
739-750
刊行年月
2025-03-01
言語
英語
ハンドルURL
https://hdl.handle.net/11094/100315
PISSN
00432288
eISSN
18786669
関連情報 (isIdenticalTo)
DOI (出版社版)
https://doi.org/10.1007/s40194-024-01890-7
アクセス権
open access
権利情報
This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ
Version of Record
カテゴリ
学術雑誌論文 Journal Article