Advanced Technologies and Materials

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Vol. 47 No. 1 (2022)
Original articles

Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature

Srđan Bulatović
Institute for Materials Testing (IMS), Bulevar vojvode Mišića 43, Belgrade, Serbia
Vujadin Aleksić
Institute for Materials Testing (IMS), Bulevar vojvode Mišića 43, Belgrade, Serbia
Ljubica Milović
University of Belgrade, Faculty of Technology and Metallurgy, Serbia
Bojana Zečević
University of Belgrade, Innovation Centre of Faculty of Technology and Metallurgy, Karnegijeva 4, Belgrade, Serbia

Published 2022-06-01

abstract views: 20 // Full text article (PDF): 10


Keywords

  • crack growth rate,
  • welded joint,
  • HSLA steel

How to Cite

Bulatović, S., Aleksić, V., Milović, L., & Zečević, B. (2022). Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature. Advanced Technologies and Materials, 47(1), 1–4. https://doi.org/10.24867/ATM-2022-1-001

Abstract

Welded joint is a critical region of a welded structure and fracture mechanics analysis is inevitable in the structural integrity assessment of all welded structures. This paper shows the determining of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The applied methodology refers to the Paris relation where the link was established between the variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation. This is mostly expressed when determining growth parameters of the fatigue crack in heat affected zone of HSLA steel, where different changes of growth speed of the fatigue crack clearly express differences in structure of the crack pass.

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