ISSN: 0354-7965; eISSN: 3042-3163; UDC: 621.791; DOI: 10.65156

Proceedings of the 34th International Conference WELDING 2026, pp. 9-15


Crack resistance of ultra-high strength low alloyed steel welded joints

Snežana Joksić1, Aleksandar Sedmak2, a, Stefan Dikić3, Bojan Medjo3, Shengwen Tu4, Radomir Jovičić5, Zijah Burzić, Marko Marković6, Jovana Vilimonović7

  • 1Faculty of Technical Sciences, University of Pristina, Kosovska Mitrovica, Serbia
  • 2Faculty of Mechanical Engineering, University of Belgrade, Serbia
  • 3Faculty of Technology and Metallurgy, University of Belgrade, Serbia
  • 4School of Chemical Engineering and Technology, Xi'an Jiaotong University, China
  • 5Structural Integrity and Life Society “Prof. Dr. Stojan Sedmak”, Belgrade, Serbia
  • 6EPS, branch TENT, Sector Investments, Serbia
  • 7Akademija strukovnih studija kosovsko metohijska, odsek Zvecan, Serbia

  • Emailaasedmak@mas.bg.ac.rs
  • DOI: 10.65156/wws.sjdp.si.001
  • Article Type: Professional paper
  • Language: English/Serbian
  • Received: January 2026
  • Accepted: June 2026

Abstract

Ultra High Strength Low Alloyed (UHSLA) steel, with Yield Strength more than 1000 MPa, was welded by Gas Shielded Arc Welding (GSAW) process using wire electrode (Yield Strength 960 MPa). The standard testing of fracture toughness, KIc, and impact toughness on instrumented Charpy pendulum with separated crack initiation and propagation energies was performed for all welded joint zones (base metal, heat-affected zone and weld metal). Results indicated that the crack resistance is relatively high in all zones with weld metal as the weakest link.


Keywords

crack resistance, welded joints, ultra-high strength steel, fracture toughness


References

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