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Toughness Examination of Physically Simulated S960QL HAZ by a Special Drilled Specimen

  • Marcell Gáspár
  • András Balogh
  • János Lukács
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

Based on the welding heat cycle models physical simulators are capable for the creation of critical heat-affected zones (HAZ). The simulated HAZ areas can be examined by various material testing methods (e. g. Charpy V-notch impact test) due to their increased homogeneous volume compared to their extension in real welding experiments. In our research work relevant technological variants (t 8.5/5 = 2.5…30 s) for gas metal arc welding technology were applied during the HAZ simulation of S960QL steel (EN 10025-6), and the effect of cooling time on the coarse-grained HAZ was analysed. In thermo-mechanical simulators the achievable cooling rate is always the function of specimen geometry and the presence of external cooling. Therefore a special drilled specimen with external cooling was developed for performing a shorter (t 8.5/5 = 2.5 s) cooling than 5 s, which cannot be realized on the conventional Gleeble specimen. Heat cycles were determined according to the Rykalin 3D model. The properties of the selected coarse-grained (CGHAZ) zone were investigated by scanning electron microscope, hardness test and Charpy V-notch impact test.

Keywords

High Strength Steel Cool Time Specimen Geometry External Cool Welding Heat Input 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The research work presented in this paper based on the results achieved within the TÁMOP-4.2.1.B-10/2/KONV-2010-0001 and TÁMOP-4.2.2.A-11/1/KONV-2012-0029 projects in the framework of the New Széchenyi Plan. The realization of these projects was supported by the European Union, and co-financed by the European Social Fund.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Marcell Gáspár
    • 1
  • András Balogh
    • 1
  • János Lukács
    • 1
  1. 1.University of MiskolcMiskolcHungary

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