Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 1417 |
| Fachzeitschrift | MATERIALS |
| Jahrgang | 15 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - Feb. 2022 |
Abstract
Hydrogen-assisted cracking is a major challenge in underwater wet welding of high-strength steels with a carbon equivalent larger than 0.4 wt%. In dry welding processes, post-weld heat treatment can reduce the hardness in the heat-affected zone while simultaneously lowering the diffusible hydrogen concentration in the weldment. However, common heat treatments known from atmospheric welding under dry conditions are non-applicable in the wet environment. Induction heating could make a difference since the heat is generated directly in the workpiece. In the present study, the thermal input by using a commercial induction heating system under water was characterized first. Then, the effect of an additional induction heating was examined with respect to the resulting microstructure of weldments on structural steels with different strength and composi-tion. Moreover, the diffusible hydrogen content in weld metal was analyzed by the carrier gas hot extraction method. Post-weld induction heating could reduce the diffusible hydrogen content by −34% in 30 m simulated water depth.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Allgemeine Materialwissenschaften
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
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in: MATERIALS, Jahrgang 15, Nr. 4, 1417, 02.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Induction Heating in Underwater Wet Welding—Thermal Input, Microstructure and Diffusible Hydrogen Content
AU - Brätz, Oliver
AU - Klett, Jan
AU - Wolf, Thomas
AU - Henkel, Knuth Michael
AU - Hassel, Thomas
AU - Maier, Hans Jürgen
N1 - Funding Information: Funding: The publication of this article was supported by the TIB Open Access Fund of the Leibniz Universität Hannover and Technische Informationsbibliothek (TIB). Acknowledgments: This study was a part of the DVS research project IGF 20.199 B funded by the AiF as a part of the program to support “Industrial Community Research and Development” (IGF) funded by the Federal Ministry for Economic Affairs and Energy on the basis of a decision of the German Bundestag.
PY - 2022/2
Y1 - 2022/2
N2 - Hydrogen-assisted cracking is a major challenge in underwater wet welding of high-strength steels with a carbon equivalent larger than 0.4 wt%. In dry welding processes, post-weld heat treatment can reduce the hardness in the heat-affected zone while simultaneously lowering the diffusible hydrogen concentration in the weldment. However, common heat treatments known from atmospheric welding under dry conditions are non-applicable in the wet environment. Induction heating could make a difference since the heat is generated directly in the workpiece. In the present study, the thermal input by using a commercial induction heating system under water was characterized first. Then, the effect of an additional induction heating was examined with respect to the resulting microstructure of weldments on structural steels with different strength and composi-tion. Moreover, the diffusible hydrogen content in weld metal was analyzed by the carrier gas hot extraction method. Post-weld induction heating could reduce the diffusible hydrogen content by −34% in 30 m simulated water depth.
AB - Hydrogen-assisted cracking is a major challenge in underwater wet welding of high-strength steels with a carbon equivalent larger than 0.4 wt%. In dry welding processes, post-weld heat treatment can reduce the hardness in the heat-affected zone while simultaneously lowering the diffusible hydrogen concentration in the weldment. However, common heat treatments known from atmospheric welding under dry conditions are non-applicable in the wet environment. Induction heating could make a difference since the heat is generated directly in the workpiece. In the present study, the thermal input by using a commercial induction heating system under water was characterized first. Then, the effect of an additional induction heating was examined with respect to the resulting microstructure of weldments on structural steels with different strength and composi-tion. Moreover, the diffusible hydrogen content in weld metal was analyzed by the carrier gas hot extraction method. Post-weld induction heating could reduce the diffusible hydrogen content by −34% in 30 m simulated water depth.
KW - Fine-grained construction steel
KW - Hydrogen analysis
KW - Hyperbaric wet welding
KW - Induction heating
KW - Post-weld heat treatment
KW - Preheating
KW - Underwater technology
UR - http://www.scopus.com/inward/record.url?scp=85124895535&partnerID=8YFLogxK
U2 - 10.3390/ma15041417
DO - 10.3390/ma15041417
M3 - Article
AN - SCOPUS:85124895535
VL - 15
JO - MATERIALS
JF - MATERIALS
SN - 1996-1944
IS - 4
M1 - 1417
ER -