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Influence of Welding on Dynamic Fracture Toughness of Strenx 700MC Steel

1
Faculty of Transport Engineering, Department of Mechanic and Materials, University of Pardubice, Studentská 95, 53210 Pardubice, Czech Republic
2
Faculty of Mechanical Engineering, Department of Materials Engineering, University of Žilina, Univerzitná 8215/1, 01026 Žilina, Slovakia
*
Author to whom correspondence should be addressed.
Metals 2019, 9(5), 494; https://doi.org/10.3390/met9050494
Received: 7 February 2019 / Revised: 6 April 2019 / Accepted: 26 April 2019 / Published: 28 April 2019
(This article belongs to the Special Issue High-Strength Low-Alloy Steels)
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Abstract

Thermomechanically processed high-strength steels feature specific fracture behavior. One of the decisive criteria for their application is their stability against internal defects during impact loads, especially in connection with the welding. The work is focused on experimental analyses of the influence of welding on static and dynamic fracture toughness of Strenx 700MC steel. The fracture toughness was determined using the circumferentially notched round bar specimens during static loads and two dynamic load levels. To achieve a homogeneous zone for the requirements of fracture toughness tests, simulation of the welding influence was performed. Fractographic and metallographic analyses described a specific fracture behavior controlled by the internal structural heterogeneity. A limiting degradation process due to welding was identified by the microstructural analysis. View Full-Text
Keywords: dynamic fracture toughness; high strength steels; fracture behavior; welding influence; heat-affected zone; simulation of welding; heterogeneous carbide precipitation dynamic fracture toughness; high strength steels; fracture behavior; welding influence; heat-affected zone; simulation of welding; heterogeneous carbide precipitation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Schmidová, E.; Bozkurt, F.; Culek, B.; Kumar, S.; Kuchariková, L.; Uhríčik, M. Influence of Welding on Dynamic Fracture Toughness of Strenx 700MC Steel. Metals 2019, 9, 494.

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