Charpy absorbed energy in simulated heat-affected zone of laser-arc hybrid welded joints by high-strength steel for bridge structures

Chen, Gang; Hirohata, Mikihito; Sakai, Natsumi et al.

International Journal of Advanced Manufacturing Technology, 2023, 127, 2655-2669

Number of Access:375（2025-10-31 22:17 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/92498

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Title
Charpy absorbed energy in simulated heat-affected zone of laser-arc hybrid welded joints by high-strength steel for bridge structures
Creator
CreatorName
Chen, Gang
NRID
1000050565140 1000050565140
ORCID
0000-0003-4013-7960 0000-0003-4013-7960
researchmap permalink
m_hirohata m_hirohata
Scopus Author ID
7006219862 7006219862
CreatorName
Hirohata, Mikihito
CreatorName
Sakai, Natsumi
CreatorName
Hyoma, Kengo
CreatorName
Matsumoto, Naoyuki
CreatorName
Inose, Koutarou
Subject
Butt-welded joints
Charpy impact test
Laser-arc hybrid welding
Simulated thermal cycle test
Steels for bridge high performance structures
Description
Chen G., Hirohata M., Sakai N., et al. Charpy absorbed energy in simulated heat-affected zone of laser-arc hybrid welded joints by high-strength steel for bridge structures. International Journal of Advanced Manufacturing Technology 127, 2655 (2023); https://doi.org/10.1007/s00170-023-11420-2.
Abstract
The application of laser-arc hybrid welding (so-called, hybrid welding) to the fabrication of steel bridge members has recently been investigated. One-pass full-penetration butt joints of steels for bridge high-performance structure (SBHS400 and SBHS500) with a thickness of 15 mm were performed by hybrid welding. The sound butt joints by hybrid welding were confirmed by a series of tests. The Charpy impact test was performed on the test pieces extracted from the hybrid welded butt joints with specified test temperatures. A phenomenon known as fracture path deviation (FPD) occurred in most test pieces, due to a large variation in material properties of the heat-affected zone (HAZ), resulting in the difficulty of estimating the toughness of HAZ in hybrid welded joints. Therefore, the Charpy impact test was conducted on the test pieces subjected to the welding thermal cycle tests of hybrid welding, which can exclude the heterogeneity of material properties and obtain the Charpy absorbed energy of the HAZ with high accuracy. The test results indicated that FPD was not observed in all thermal cycle simulated test pieces because the uniform metallographic structures in the vicinity of the notch were formed by the simulated thermal cycle tests, and all thermal cycle simulated test pieces satisfied 47 J at the specified test temperatures, a value that prevents brittle fracture for SBHS. Besides, for investigating the effect of the high Charpy absorbed energy guaranteed by SBHS on the toughness of hybrid welded joints, the Charpy absorbed energy of the thermal cycle simulated test pieces of SBHS and those of conventional steel (SM400B) were compared. The results showed that some of the thermal cycle simulated test pieces of SM400B failed to satisfy 27 J, suggesting that SBHS may ensure a Charpy absorbed energy of 47 J or more in the HAZ of hybrid welded joints.
Publisher
Springer Science and Business Media Deutschland GmbH
Source Title
International Journal of Advanced Manufacturing Technology
Volume (Issue)
127
Page
2655-2669
Date of Issued
2023-07-01
Language
English
Handle URL
https://hdl.handle.net/11094/92498
PISSN
02683768
eISSN
14333015
NCID
AA10693929
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1007/s00170-023-11420-2
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article