TY - GEN

T1 - Reducing the risk of hydrogen-induced cold cracks in hyperbaric wet welding of high-strength steels by using austenitic welding consumables

AU - Klett, Jan

AU - Hassel, Thomas

N1 - Funding information: The IGF Project number 19.211 N/DVS number V4.016 of the research association ”Forschungsvereinigung Schweißen und verwandte Verfahren e. V. des DVS, Aachener Str. 172, 40223 Düsseldorf” was, on the basis of a resolution of the German Bundestag, promoted by the German Ministry of Economic Affairs and Energy via the Federation of Industrial Research Associations (AiF) within the framework of the programme for the promotion of joint industrial research (IGF). The research organization would also like to thank the members of the project-accompanying committee as well as the students involved in the project for their support. Special thanks also go to the divers of the company Tauchmayer GmbH and Mr. Robert Leu-terer, who performed the manual welds under water at the UWTH.

PY - 2020/3

Y1 - 2020/3

N2 - In hyperbaric wet welding of structural steels, there is an increased risk of hydrogen-induced cold cracking due to the rapid cooling in conjunction with a supply of diffusible hydrogen generated by the dissociation of water in the arc. The risk increases when steels with a carbon equivalent above 0.4% are used, so that steels with a yield strength above 355 MPa are generally considered not to be weldable under hyperbaric wet conditions. In the presented research project austenitic welding consumables were used as macroscopic hydrogen traps to reduce the diffusible hydrogen content in wet welded joints. In addition to the hydrogen content, the mechanical properties of welded joints were validated by three-point bending tests.

AB - In hyperbaric wet welding of structural steels, there is an increased risk of hydrogen-induced cold cracking due to the rapid cooling in conjunction with a supply of diffusible hydrogen generated by the dissociation of water in the arc. The risk increases when steels with a carbon equivalent above 0.4% are used, so that steels with a yield strength above 355 MPa are generally considered not to be weldable under hyperbaric wet conditions. In the presented research project austenitic welding consumables were used as macroscopic hydrogen traps to reduce the diffusible hydrogen content in wet welded joints. In addition to the hydrogen content, the mechanical properties of welded joints were validated by three-point bending tests.

KW - Crack formation

KW - Hydrogen

KW - Underwater welding

UR - http://www.scopus.com/inward/record.url?scp=85088048003&partnerID=8YFLogxK

M3 - Contribution in non-scientific journal

AN - SCOPUS:85088048003

VL - 19

SP - 54

EP - 60

JO - Welding and Cutting

JF - Welding and Cutting

SN - 1612-3433

ER -